Hydrochloric acid safety data sheet: what every employer must know

Last updated 2026-07-09

What is a hydrochloric acid safety data sheet and why does OSHA require it?

A safety data sheet for hydrochloric acid is a 16-section document that tells workers and emergency responders what HCl is, how it can hurt them, and what to do when something goes wrong. OSHA's Hazard Communication Standard, codified at 29 CFR 1910.1200, requires chemical manufacturers to provide an SDS for every hazardous chemical they sell, and it requires employers to keep those sheets accessible to affected employees during every work shift. ^[1]

The SDS replaced the older MSDS (material safety data sheet) in 2012, when OSHA aligned its HazCom standard with the Globally Harmonized System of Classification and Labelling of Chemicals (GHS). Search "material safety data sheet hydrochloric acid" and you're looking for the same document under its pre-2012 name. The chemical facts didn't change. GHS just forced everyone into one predictable structure so a worker at 2 a.m. doesn't have to hunt for the first-aid steps.

HCl shows up in small business more than almost any other corrosive. Metal shops use it to pickle steel. Restaurants and food processors use food-grade HCl for pH control. Pool service companies use it to adjust water chemistry. Janitorial suppliers sell diluted hydrochloric acid as toilet bowl cleaner. OSHA estimated in its HazCom 2012 rulemaking that roughly 43 million U.S. workers are potentially exposed to hazardous chemicals on the job, and HCl is one of the usual suspects. ^[2]

The hazard communication standard is the legal backbone here. If your facility uses HCl in any form and you can't produce the SDS when an inspector walks in, that's a serious-violation citation. As of 2024, a serious violation costs up to $16,550. ^[12]

What are the 16 sections of an HCl safety data sheet?

GHS fixes what goes in each of the 16 sections. Here's what each one actually holds for hydrochloric acid, not the generic textbook definition.

Section 1: Identification. Product name, manufacturer contact, recommended use, and an emergency phone number. For HCl this lists CAS number 7647-01-0 and UN number 1789.

Section 2: Hazard identification. The most-read section. HCl is a GHS Category 1 flammable gas in anhydrous form, and in aqueous solution it's a Category 1 skin corrosive, eye damager, and respiratory sensitizer. The signal word is DANGER. ^[3]

Section 3: Composition/information on ingredients. Chemical identity and concentration. Concentrated hydrochloric acid runs 36 to 38% HCl by weight; diluted forms run 10 to 20%. Impurities like arsenic can appear here for technical-grade acid.

Section 4: First-aid measures. Skin contact: remove contaminated clothing, flush with large amounts of water for at least 15 to 20 minutes. Eye contact: flush immediately for at least 15 to 20 minutes, then get medical attention fast. Inhalation: move to fresh air, apply artificial respiration if the person isn't breathing, call emergency services.

Section 5: Fire-fighting measures. Aqueous HCl isn't flammable, but it reacts with many metals to make flammable hydrogen gas. Use water fog, foam, or dry chemical. Never put water directly on pressurized anhydrous HCl containers.

Section 6: Accidental release measures. Evacuate, wear full PPE, neutralize small spills with dry sodium bicarbonate or lime, collect in labeled containers for disposal. Large spills need emergency responders.

Section 7: Handling and storage. Store cool and ventilated, away from bases (ammonia, sodium hydroxide), oxidizers, and reactive metals. Keep containers tightly closed. Use only where exhaust ventilation is adequate.

Section 8: Exposure controls/personal protection. Where PPE requirements and exposure limits live. Full breakdown in its own section below.

Section 9: Physical and chemical properties. Concentrated aqueous HCl is a colorless to slightly yellow fuming liquid with a sharp, suffocating odor. Boiling point around 50 degrees C (122 degrees F) for a 37% solution. Specific gravity 1.18.

Section 10: Stability and reactivity. Stable under normal conditions. Reacts violently with strong bases, oxidizers (bleach, permanganates), and most common metals. Mixed with bleach it produces toxic chlorine gas, an accident pattern OSHA has documented over and over. ^[4]

Section 11: Toxicological information. Acute oral LD50 in rats is around 900 mg/kg for 37% HCl (Sigma-Aldrich SDS). Chronic exposure links to dental erosion, chronic bronchitis, and dermatitis.

Section 12: Ecological information. HCl is highly water-soluble and acidifies aquatic environments fast. It isn't bioaccumulative.

Section 13: Disposal considerations. Neutralize before disposal. Follow local, state, and federal rules, including EPA Resource Conservation and Recovery Act (RCRA) requirements. ^[5]

Section 14: Transport information. UN 1789, Packing Group II, Hazard Class 8 (corrosive). Proper shipping name: Hydrochloric acid solution.

Section 15: Regulatory information. All applicable U.S. rules: OSHA 29 CFR 1910.1000 Table Z-1 (PEL), CERCLA reportable quantity (5,000 lbs for HCl), SARA Title III Section 302 and 313 thresholds, California Proposition 65 status. ^[6]

Section 16: Other information. Revision date, version number, and any other manufacturer notes.

What are the exposure limits for hydrochloric acid, and how do they compare?

The OSHA PEL for hydrochloric acid is a ceiling of 5 ppm, meaning it can't be exceeded at any moment during a shift. ACGIH sets a more protective ceiling of 2 ppm. NIOSH puts the IDLH at 50 ppm. These are the numbers that actually protect workers, and they split apart depending on which agency set them.

Exposure Limit	Value	Authority	Notes
PEL (ceiling)	5 ppm	OSHA (29 CFR 1910.1000, Table Z-1)	Ceiling, not 8-hr TWA; cannot be exceeded at any time [6]
TLV-C (ceiling)	2 ppm	ACGIH	More protective than OSHA PEL
REL (ceiling)	5 ppm	NIOSH	Matches OSHA PEL
IDLH	50 ppm	NIOSH	Immediately dangerous to life or health [7]
ERPG-2	3 ppm (1-hr)	AIHA	Serious irreversible health effects threshold

Two things stand out. The OSHA PEL is a ceiling, not a time-weighted average, so 5 ppm is the hard maximum at any instant, not an average you can spike above for a few minutes. And ACGIH's 2 ppm is meaningfully tighter. Plenty of industrial hygienists use it as the operational target, because the OSHA PEL dates to 1971 and the toxicology has moved a long way since.

NIOSH sets the IDLH at 50 ppm. At that concentration you need supplied-air or self-contained breathing apparatus. Ten minutes at 50 ppm can cause severe pulmonary edema. ^[7]

Compare that to acetic acid (common in food processing and labs), which carries a PEL of 10 ppm as an 8-hour TWA, a much looser leash. A benzoic acid SDS usually shows no established OSHA PEL in vapor form because it barely evaporates at room temperature, and salicylic acid is the same story. HCl sits in a more serious regulatory tier than any of them.

What PPE does the hydrochloric acid SDS require?

Section 8 of every HCl SDS covers personal protective equipment, but the right gear depends on your task and concentration. The floor for any HCl handling is chemical splash goggles, chemically resistant gloves (butyl or neoprene), and a chemical-resistant apron. Here's how to read those requirements without guessing. ^[8]

Eyes and face: Chemical splash goggles rated to ANSI Z87.1 are the minimum. Add a full face shield for concentrated acid or high-splash work. Safety glasses alone don't cut it.

Hands: Butyl rubber or neoprene gloves for concentrated HCl. Skip latex. HCl permeates it fast. Check the manufacturer's chemical resistance chart for your exact glove material and thickness, and toss any glove showing degradation.

Body: Chemical-resistant apron or full suit, scaled to concentration and task. A lab coat handles incidental exposure to low concentrations. Bulk handling of concentrated acid calls for a full splash suit.

Respiratory: Below the 5 ppm ceiling with good engineering controls, you may need no respirator at all. Above the PEL, or where controls can't reliably hold exposure down, use a NIOSH-approved air-purifying respirator with an acid gas cartridge (OV/P100 combination). Near the 50 ppm IDLH, supplied-air or SCBA is mandatory.

Here's the trap: the moment you require respirator use, even voluntary use in some cases, you're pulled into 29 CFR 1910.134. That means a written respiratory protection program, fit testing, medical evaluation, and annual training. ^[8]

Small shops running diluted HCl (say 10% pool acid) have an easier calculus, but not a trivial one. Splash goggles, nitrile or neoprene gloves, and a face shield for pouring cover most jobs. Document what you picked and why in your written hazard communication program.

How do you read the GHS hazard and precautionary statements on an HCl SDS?

GHS standardized the hazard language, so once you know the code system you can decode any HCl SDS. Section 2 uses H-codes for hazards and P-codes for precautions. The difference between two codes can decide whether a worker keeps their skin.

For hydrochloric acid, common H-codes include:

• H290: May be corrosive to metals
• H314: Causes severe skin burns and eye damage
• H335: May cause respiratory irritation
• H331: Toxic if inhaled (for concentrated solutions)

Common P-codes include:

• P260: Do not breathe fumes or vapors
• P280: Wear protective gloves, eye protection, and face protection
• P301+P330+P331: If swallowed, rinse mouth, do not induce vomiting
• P303+P361+P353: If on skin (or hair), remove contaminated clothing immediately, rinse skin with water
• P304+P340: If inhaled, remove person to fresh air and keep comfortable for breathing
• P305+P351+P338: If in eyes, rinse cautiously with water for several minutes, remove contact lenses if possible

These codes show up on the container label too, not only the SDS. Train your workers to spot the DANGER signal word and to read H314 as severe corrosion rather than mild irritation. That's real first-aid knowledge. H315 means skin irritation, so wash it off. H314 means severe burns, so flush 15 to 20 minutes and head to the ER. Confuse the two and someone loses skin.

The GHS pictograms on the label track the classifications. For HCl you'll see the corrosion pictogram (liquid eating through a surface and a hand) and the exclamation mark for respiratory irritation. If you spot a skull-and-crossbones on an HCl product, that product is classified acutely toxic and deserves an even more conservative approach.

What do you do in an HCl spill or exposure emergency?

For skin or eye contact, flush with large amounts of water for at least 15 to 20 minutes, immediately, and then get medical attention even if the burn looks minor. In a real emergency nobody stops to read the SDS, which is exactly why Section 6 (accidental release) and Section 4 (first aid) need to become plain written steps posted before an incident ever happens.

For skin contact, the decontamination research is consistent: copious water flushing for 15 to 20 minutes is the first move. Do not put neutralizing agents like baking soda on skin. The neutralization reaction throws off heat and can deepen the burn. Water only, right away. Then get medical attention, because HCl burns can worsen over hours. ^[4]

For eye contact, the same 15 to 20 minute flush applies. An eyewash station must sit within 10 seconds of travel (per ANSI Z358.1) from any area where HCl is handled, and 29 CFR 1910.151(c) requires "suitable facilities for quick drenching or flushing of the eyes and body" wherever employees may be exposed to corrosive materials. That's an OSHA requirement, not a suggestion. ^[9]

For inhalation, move the person to fresh air. If they're not breathing, call 911. Pulmonary edema from HCl inhalation can lag by hours, so any significant inhalation exposure warrants emergency medical evaluation even when the worker says they feel fine.

For spills, small ones (under about a liter of dilute acid) can often be neutralized with dry sodium bicarbonate or lime, swept up, and disposed of properly. Large spills, or any spill of concentrated acid in an enclosed space, mean evacuate and call emergency services. Pre-position your spill kit, label it clearly, and train at least two people on it.

An incident report is required any time a worker gets medical treatment beyond first aid for an HCl exposure. If the injury causes days away from work or restricted duty, it goes on your OSHA 300 log.

How do employer responsibilities differ for HCl versus other acids like acetic acid or benzoic acid?

The SDS format is identical for every hazardous chemical, but the regulatory tier and the day-to-day controls diverge based on hazard classification. Hydrochloric acid sits near the top of the list for common acids because of its volatility, its ceiling PEL (not a TWA), and its low 50 ppm IDLH. That's where you concentrate your safety budget.

Acetic acid tells a gentler story. Its SDS shows a PEL of 10 ppm as an 8-hour TWA, more forgiving than a ceiling. Dilute acetic acid (vinegar) irritates skin and eyes but isn't a severe corrosive at typical working concentrations. The PPE looks similar to HCl, but the respiratory triggers sit higher.

Benzoic acid is a solid at room temperature with very low vapor pressure. The main exposure route is dust inhalation or skin and eye contact, not vapor. There's no established OSHA PEL because vapor isn't the hazard. A benzoic acid SDS or a salicylic acid SDS reads very differently in Sections 8 and 9 because the physical form and primary hazard pathway are nothing like HCl's.

The practical takeaway: if you handle HCl alongside weaker acids, don't let familiarity with the weak ones dull your respect for the strong one. A worker who pours acetic acid all day without a scratch will underestimate concentrated hydrochloric acid. Twenty minutes of cross-training on the SDS differences is cheap insurance.

Acid | OSHA PEL | Primary Form | Corrosivity Classification ---|---|---|--- Hydrochloric acid | 5 ppm ceiling | Liquid/gas | GHS Category 1 (severe) Acetic acid | 10 ppm TWA | Liquid/vapor | GHS Category 1 (concentrated), lower risk dilute Benzoic acid | None established | Solid/dust | Irritant, not corrosive at typical use Salicylic acid | None established | Solid/dust | Irritant

Where can you find a legitimate HCl safety data sheet?

Get your SDS from a credible source, not a random PDF off a search result. The manufacturer of the exact product you use is legally required to provide one, and that's your first stop. Pull the SDS that matches your brand and concentration, not a generic one.

Reliable free sources:

Manufacturer websites. Sigma-Aldrich (Merck), Fisher Scientific, VWR, and Univar all post their SDS documents on the product pages. If you buy pool acid from a supply company, that company must hand you the SDS for the specific concentration and brand you purchased.

OSHA HazCom guidance. OSHA doesn't host SDS documents, but its HazCom pages explain what to do if a manufacturer stonewalls you. ^[1]

CDC/NIOSH chemical hazard data. NIOSH publishes IDLH values and hazard documentation for hundreds of chemicals, HCl among them. ^[7]

CAMEO Chemicals (NOAA/EPA). This free tool at cameo.noaa.gov gives response information for HCl and hundreds of other chemicals, including incompatibilities and reactive hazard data. ^[4]

One thing to watch: SDS documents are version-controlled. When the manufacturer revises the sheet, you update your file. Check the SDS date annually and whenever a new shipment arrives. Running a five-year-old SDS after the classification changed is a compliance gap waiting for an inspector.

A binder works fine for smaller operations. Bigger ones lean on SDS management software. The rule doesn't care which you pick: employees must be able to reach the SDS for any chemical they work with during their shift, without asking a supervisor first.

What written programs and training does OSHA require when you use HCl?

The HazCom standard (29 CFR 1910.1200) requires three things: a written hazard communication program, a current chemical inventory list, and training for employees on the hazards of the chemicals they work with. ^[1] Using HCl doesn't add a separate OSHA standard on top of HazCom, but depending on concentration and use, it can trip other standards.

Your written HazCom program has to document how you handle labeling, how SDS files are kept and accessed, and how you train people. It doesn't need to be long. A two-page program that accurately describes what you actually do beats a 20-page program collecting dust on a shelf.

Training has to cover the requirements of the HazCom standard, where the chemical inventory and SDS files live, how to read a GHS label and SDS, the specific hazards of the chemicals employees handle (yes, HCl by name if they use it), and the protective measures available. Training happens before the employee works with a hazardous chemical, not after. ^[1]

If HCl concentrations could approach or exceed the 5 ppm ceiling, you likely also need:

• A written respiratory protection program (29 CFR 1910.134) ^[8]
• An emergency action plan (29 CFR 1910.38) covering chemical spill scenarios
• Eyewash and emergency shower facilities (29 CFR 1910.151) ^[9]

For small businesses that want a complete, OSHA-aligned safety program without hiring a consultant, SafetyFolio's safety program generator walks you through building a written HazCom program (and the other required written programs) in about 15 minutes. You answer questions about your workplace, the tool builds the document. Worth a look if you're starting from zero.

To see the broader OSHA compliance framework your HazCom program fits into, that context helps you spot which other standards apply to you.

What are the most common OSHA citations related to hydrochloric acid and HazCom?

HazCom (29 CFR 1910.1200) is one of OSHA's most-cited standards year after year. In fiscal year 2023 it ranked second on OSHA's top ten most frequently cited standards list, with over 3,000 violations. ^[10] For HCl users specifically, the citations cluster into a handful of predictable failures.

Missing or inaccessible SDS. The HCl sheet can't be locked in the manager's office or available only on day shift. If your night crew handles pool acid or industrial cleaner, they need that SDS at 2 a.m.

Inadequate container labeling. Pour HCl from its original container into a spray bottle or secondary container and that container needs a GHS-compliant label. The one exception is a portable container used only by the person who filled it. ^[1]

Missing written program. Plenty of small businesses train verbally and write nothing down. Inspectors ask for the written program. No document, automatic citation.

Incomplete or missing training records. You have to show training happened before employees handled the chemical. A sign-in sheet with dates and the topic covered is the minimum.

Stale chemical inventory. Add a new chemical, including a new HCl product from a different supplier, and the inventory list has to be updated and the SDS obtained.

For what an OSHA inspection actually looks like and how to prepare, the hazard communication compliance checklist is a practical place to start.

Does the HCl SDS change for different concentrations or forms?

Yes, and it matters in practice. HCl at 37% (concentrated, technical or reagent grade) carries different hazard classifications than 10 to 15% pool acid or roughly 0.5% stomach acid. Manufacturers must provide an SDS specific to their product as sold, concentration included.

What shifts across concentrations:

Volatility and inhalation hazard. Concentrated HCl fumes heavily at room temperature. You can see the white mist rising off it. Dilute 10% HCl barely fumes under normal conditions. Section 11 and the engineering controls in Section 8 change accordingly.

GHS classification. Concentrated HCl typically carries Category 1 acute inhalation toxicity. Dilute forms may drop to Category 3 or 4, or carry no inhalation toxicity classification at all.

PPE requirements. The concentrated-acid SDS specifies heavier respiratory protection and more resistant PPE than a 10% solution's SDS. Don't assume the gear from one applies to another.

Anhydrous HCl (gas). HCl also exists as a compressed gas (UN 1050). That SDS looks nothing like the aqueous solution sheets, because the hazard profile, physical properties, and emergency response all differ. Anhydrous HCl needs a compressed gas program under 29 CFR 1910.101 on top of HazCom.

The CAS number (7647-01-0) stays the same across forms. The UN number and GHS classification change with physical state. Keep the SDS that matches the exact product you bought.

How should small businesses store and organize SDS documents for HCl and other chemicals?

OSHA doesn't mandate a format for SDS storage. The rule is simply that employees can reach the SDS for any chemical they work with during their shift. ^[1] That flexibility is real, but it also means you have to design a system that actually holds up.

With fewer than 20 chemicals, a three-ring binder at each work location is still the most reliable setup. It's offline, needs no password, and works during a power outage or an internet drop. Tab it alphabetically, put the chemical inventory list up front, and date every entry so you know when it was last checked.

With 50 or more chemicals, or multiple locations, electronic SDS management makes more sense. If you go electronic, OSHA requires a backup system in case the primary one fails. A printed backup binder or an offline copy on a local machine covers it.

Each SDS file should hold the current version-dated sheet, the date you received it, and a note of when you last verified it's current. A simple log at the front of the binder tracking review dates does the job.

One thing small businesses miss: the chemical inventory list is a separate required document from the SDS file. It's a list of every hazardous chemical in the workplace. It doesn't have to be fancy, but it has to exist and stay current. Add a new HCl product from a different supplier, add it to the list, and get the new SDS before that product hits your shelf.

Frequently asked questions

What is the IDLH for hydrochloric acid?

NIOSH sets the Immediately Dangerous to Life or Health (IDLH) concentration for hydrochloric acid at 50 ppm. At that level you need a supplied-air respirator or SCBA. The OSHA ceiling PEL is 5 ppm, the maximum allowable concentration at any moment during a shift. Even brief exposures above 50 ppm can cause severe pulmonary damage.

Do I need a written hazard communication program if I only use one hazardous chemical like HCl?

Yes. OSHA's HazCom standard (29 CFR 1910.1200) requires a written hazard communication program in any workplace where employees are exposed to hazardous chemicals, no matter how few chemicals are involved. The program must address how your facility handles labels, SDS access, and employee training. Even a one-chemical workplace needs it in writing.

What's the difference between an SDS and a material safety data sheet (MSDS) for hydrochloric acid?

They hold the same chemical hazard information, but the format differs. Before 2012, OSHA allowed MSDS documents in various formats with no standard section order. After the 2012 GHS alignment, OSHA requires the 16-section SDS format. An old MSDS for HCl may still be factually accurate, but the format no longer meets OSHA requirements. Get a current SDS from your supplier.

What PPE is required when handling hydrochloric acid?

At minimum: chemical splash goggles (not safety glasses), butyl rubber or neoprene gloves, and a chemical-resistant apron. For concentrated acid or high-splash operations, add a full face shield. Respiratory protection (acid gas cartridge respirator) is required if engineering controls can't hold airborne HCl below the 5 ppm OSHA ceiling PEL. Respirator use triggers a full written respiratory protection program under 29 CFR 1910.134.

How long do I need to flush skin or eyes after hydrochloric acid exposure?

Flush with large amounts of water for at least 15 to 20 minutes for both skin and eye contact. Do not apply neutralizing agents like baking soda directly to skin. For eye contact, an ANSI Z358.1-compliant eyewash station must sit within 10 seconds of travel from the work area. Always get medical attention after any significant HCl exposure, even if the injury looks minor at first.

Can I transfer hydrochloric acid to a different container without relabeling it?

If you transfer HCl from its original container to a secondary container, that new container needs a GHS-compliant label showing the product name, hazard pictograms, signal word, and hazard statements. The only exception OSHA allows is a portable container filled for the immediate use of the person who filled it. If anyone else might use it, or it might sit on a shelf, it needs a label.

What's the OSHA citation risk for not having an SDS for hydrochloric acid?

Failure to maintain an accessible SDS violates 29 CFR 1910.1200, typically cited as a serious violation. OSHA serious violation fines run up to $16,550 per violation as of 2024. Willful or repeat violations can reach $165,514 per violation. HazCom has been one of OSHA's top two most-cited standards for over a decade, which makes it a reliable inspection focus.

How often should I review or update the SDS for hydrochloric acid?

There's no specific OSHA-mandated review interval, but you should update your SDS whenever you receive a revised version from the manufacturer, change suppliers, or find the version you have is out of date. A practical approach is to verify SDS currency annually and every time you reorder. GHS requires manufacturers to revise SDS documents within three months of learning of significant new hazard information.

Does an employee need training every time the HCl SDS is updated?

OSHA requires additional training when a new physical or health hazard enters the workplace. If an SDS update reveals a new hazard classification or significantly changes exposure controls, training is required. Minor administrative revisions (a contact change, formatting) don't independently trigger retraining. Document your decision either way in case an inspector asks why you did or didn't retrain after an SDS revision.

What's the difference between HCl's PEL and TLV, and which should I use?

OSHA's PEL for HCl is a ceiling of 5 ppm, the legal maximum. ACGIH's TLV-C is 2 ppm, a more protective recommendation built on newer science. The TLV isn't legally enforceable but reflects more current toxicology. Industrial hygienists often recommend designing engineering controls to hold HCl exposure below the ACGIH TLV-C of 2 ppm, giving workers a real safety margin above the legal limit.

What happens when hydrochloric acid mixes with bleach?

Mixing hydrochloric acid with sodium hypochlorite (bleach) produces chlorine gas, which is acutely toxic and was used as a chemical weapon in World War I. This reaction has caused multiple workplace fatalities and hospitalizations documented by OSHA. It occurs even at dilute concentrations. Never mix HCl-based cleaners with bleach-based cleaners. Section 10 of every HCl SDS lists bleach as an incompatible substance.

Do state-plan OSHA states have stricter requirements for HCl SDSs?

Twenty-nine states and territories run their own OSHA-approved state plans, which must be at least as protective as federal OSHA. Some, like California's Cal/OSHA, add requirements or set lower permissible exposure limits for certain chemicals. California's Prop 65 also requires specific warnings for HCl because it's listed as a chemical known to cause cancer. Check your state plan agency for anything beyond the federal standard.

Is pool acid the same as industrial hydrochloric acid?

Pool acid (muriatic acid) is typically 10 to 15% hydrochloric acid in water. Industrial or reagent-grade HCl runs 36 to 38%. Both are the same chemical (HCl) at different concentrations. The pool acid SDS shows lower hazard severity in some categories and may specify different PPE than the concentrated HCl SDS. Never assume the PPE from one product's SDS applies to a product at a different concentration.

Where can I find a free SDS for hydrochloric acid online?

Reliable free sources include manufacturer websites (Sigma-Aldrich, Fisher Scientific, Univar), NOAA's CAMEO Chemicals database (cameo.noaa.gov), and NIOSH's chemical hazard documentation. Always use the SDS from your actual supplier, because the hazard classification can differ by concentration and formulation. OSHA doesn't host SDS documents but provides guidance on obtaining them from manufacturers.

Sources

1. OSHA, Hazard Communication Standard (29 CFR 1910.1200): OSHA requires an SDS for every hazardous chemical, kept accessible to employees during every work shift, plus a written HazCom program, chemical inventory, and employee training
2. OSHA, Hazard Communication rulemaking (HazCom 2012 GHS alignment): OSHA estimated roughly 43 million U.S. workers are potentially exposed to hazardous chemicals in the workplace
3. OSHA, GHS Hazard Classification guidance under HazCom: HCl is classified under GHS as a Category 1 skin corrosive and eye damager in aqueous solution, with the signal word DANGER
4. NOAA, CAMEO Chemicals database: Hydrochloric Acid: Hydrochloric acid reacts with sodium hypochlorite (bleach) to produce toxic chlorine gas; documented incompatibility listed in Section 10
5. EPA, Resource Conservation and Recovery Act (RCRA) overview: HCl waste disposal must comply with RCRA regulations; corrosive wastes are listed as hazardous under RCRA
6. OSHA, 29 CFR 1910.1000 Table Z-1, Air Contaminants: OSHA PEL for hydrochloric acid is 5 ppm as a ceiling value, meaning it cannot be exceeded at any point during the work shift
7. NIOSH, Documentation for Immediately Dangerous to Life or Health (IDLH) Values: Hydrogen Chloride: NIOSH sets the IDLH for hydrochloric acid (hydrogen chloride) at 50 ppm; NIOSH REL is a ceiling of 5 ppm
8. OSHA, Respiratory Protection Standard (29 CFR 1910.134): When respirator use is required (including voluntary use in some cases), employers must implement a written respiratory protection program including fit testing and medical evaluation
9. OSHA, Medical Services and First Aid (29 CFR 1910.151): OSHA requires suitable facilities for quick drenching or flushing of eyes and body in workplaces where employees may be exposed to corrosive materials
10. OSHA, Top 10 Most Frequently Cited Standards FY2023: Hazard Communication (29 CFR 1910.1200) ranked second on OSHA's most-cited standards list in fiscal year 2023, with over 3,000 violations
11. OSHA, Penalties page (penalty amounts effective Jan 2024): OSHA serious violation fines are up to $16,550 per violation; willful or repeat violations up to $165,514 per violation as of 2024