Material safety data sheet PDF: what it is, where to find it, and how to use it

Last updated 2026-07-09

What is a material safety data sheet PDF, and is that term still correct?

"Material safety data sheet" was the official OSHA label for decades. It got retired in 2012, when OSHA aligned its Hazard Communication Standard with the United Nations Globally Harmonized System of Classification and Labelling of Chemicals (GHS). The document is now a Safety Data Sheet, or SDS. Employers had until June 1, 2016 to finish the full transition ^[1].

The old abbreviation still shows up everywhere: old binders, vendor websites, legacy chemical inventories, and plenty of Google searches. If you download a file labeled "MSDS PDF" from a supplier's site today, it's almost certainly formatted to the newer 16-section GHS standard, just under the old name. The content is what matters, not the label on the file.

The change is more than cosmetic. The old OSHA MSDS format required only 8 categories of information and gave manufacturers wide latitude on how to organize them. Two MSDSs for the same chemical from different suppliers could look completely different. The current 16-section SDS format is standardized worldwide, so a worker or a first responder in any country finds the emergency information in the same place every time.

One more thing worth knowing. "Safety data sheet PDF" and "SDS PDF" both point to the same document. You'll see all three abbreviations in this article because they're all still in wide use, and you'll run into every one of them in your day-to-day chemical management.

What does OSHA actually require for safety data sheets?

OSHA's hazard communication standard, 29 CFR 1910.1200, is the governing rule. Section (g) covers SDSs specifically. The core requirements are ^[1]:

• Chemical manufacturers and importers must prepare an SDS for each hazardous chemical they produce or import.
• Distributors must pass the SDS along to their customers.
• Employers must have an SDS for every hazardous chemical in the workplace and keep them accessible to employees during every work shift.
• The SDS must follow the 16-section GHS format.
• Employees must be trained to read and use the SDS (29 CFR 1910.1200(h)).

The accessibility requirement is the one that trips up small businesses. OSHA says "readily accessible" and means it. A PDF locked in a manager's laptop is not accessible. A binder in a locked storage room is borderline at best. The agency has accepted electronic SDS systems, but only if every employee can get to them without barriers during their shift, including night shift and weekends, and only if there's a reliable backup when the system goes down ^[2].

OSHA doesn't set a retention period for SDSs in most industries. The exception is 29 CFR 1910.1020, which covers employee exposure records. When an SDS is used as a record of hazardous substance exposure, it has to be kept for 30 years ^[3]. When in doubt, keep SDSs for at least 30 years for any substance that could create a latent health claim.

The penalty for not having SDSs on file can reach $16,131 per serious violation as of 2024 ^[4]. OSHA inspectors check SDS binders routinely. It's one of the faster things to verify during a walkthrough, and it generates a lot of citations for small employers.

What are the 16 sections of a GHS safety data sheet?

Every SDS in the GHS format must include these 16 sections, in this order. OSHA's own guidance describes them as follows ^[1]:

Section	Title	What you actually find there
1	Identification	Product name, manufacturer contact, recommended uses, emergency phone number
2	Hazard(s) identification	GHS classification, signal word (Danger or Warning), hazard and precautionary statements
3	Composition/ingredients	Chemical identity, CAS numbers, concentration or concentration range for mixtures
4	First-aid measures	Symptoms and treatment by exposure route (inhalation, skin, eye, ingestion)
5	Fire-fighting measures	Suitable extinguishing media, special hazards from combustion, PPE for firefighters
6	Accidental release measures	Spill cleanup procedures, containment, environmental precautions
7	Handling and storage	Safe handling practices, storage conditions, incompatibilities
8	Exposure controls/PPE	OSHA PELs, ACGIH TLVs, required engineering controls, recommended PPE
9	Physical and chemical properties	Appearance, odor, pH, boiling point, flash point, vapor pressure, etc.
10	Stability and reactivity	Chemical stability, conditions to avoid, incompatible materials, hazardous decomposition products
11	Toxicological information	Routes of exposure, acute and chronic health effects, LD50/LC50 data
12	Ecological information	Aquatic toxicity, persistence, bioaccumulation (not enforced by OSHA but required by GHS)
13	Disposal considerations	Waste disposal methods (not enforced by OSHA; governed by EPA)
14	Transport information	DOT, IATA, IMDG classifications
15	Regulatory information	SARA 302/311/312/313, TSCA, state right-to-know laws
16	Other information	Revision date, preparation date, key changes from last version

Sections 12 through 15 are required by the GHS, but OSHA has stated it doesn't enforce those sections under 29 CFR 1910.1200 ^[1]. That doesn't make them useless. Section 14 is the first thing your shipping team should check before putting a chemical in a box.

How do you read an SDS PDF for a specific chemical like calcium chloride?

Calcium chloride is a good example because it's everywhere: ice melt products, food processing, concrete acceleration, oil drilling. It looks benign next to something like hydrochloric acid. The SDS still carries real hazard information you have to act on.

Section 2 of a typical material safety data sheet for calcium chloride PDF shows a GHS classification of "Serious eye damage, Category 1" and often "Skin irritation, Category 2." The signal word is "Danger" because of the eye hazard. That alone tells you safety glasses aren't enough. You need goggles rated for liquid splash if workers are handling bulk calcium chloride or concentrated solutions.

Section 8 is where the exposure limits live. OSHA hasn't set a specific PEL for calcium chloride, but most SDS documents reference the ACGIH TLV for inert or nuisance dust: 10 mg/m3 for total dust and 3 mg/m3 for respirable fraction ^[12]. If you're using a respirator, that section tells you the minimum type required.

Section 7 notes that calcium chloride is hygroscopic, meaning it pulls moisture from the air aggressively. That affects storage (keep containers sealed) and handling (bags clump and get heavy). Section 10 flags that it reacts with zinc, producing flammable hydrogen gas, and with strong bases. Small detail. Exactly the kind of incompatibility information that prevents a serious incident.

The key habit is to read sections 2, 4, 7, 8, and 10 before you start using a new chemical. The other sections matter for emergencies, shipping, and long-term exposure tracking. Those five tell you what to do today.

What does the safety data sheet for calcium carbonate look like, and how does it compare?

Calcium carbonate (limestone, chalk, calcite) is one of the most common industrial minerals in the country, used in paper manufacturing, food additives, and construction. Its material safety data sheet PDF is instructive because it shows how a substance with low acute toxicity still carries real hazards workers need to know about.

A typical SDS for calcium carbonate shows no GHS hazard classification for the pure substance under most classification schemes. The signal word may be absent entirely, which is itself information: it tells you this substance doesn't meet the GHS threshold for a classified hazard. The SDS will still note that calcium carbonate dust can cause respiratory irritation, and that prolonged inhalation of high dust concentrations risks lung damage (occupational pneumoconiosis).

Section 8 is where you spend your time. OSHA's PEL for calcium carbonate as a particulate not otherwise regulated (PNOR) is 15 mg/m3 for total dust and 5 mg/m3 for respirable dust ^[5]. The ACGIH TLV for inhalable particulate matter is 10 mg/m3 ^[12]. If your operation kicks up airborne dust from cutting, grinding, or bulk handling, those thresholds are the trigger for respiratory protection decisions.

Put the two side by side. Calcium chloride's SDS carries a more serious eye hazard (Category 1 serious damage versus calcium carbonate's possible irritation), while calcium carbonate's dust hazard is the primary concern for long-term respiratory health. Neither is especially dangerous in typical small-business applications, but each one points you toward specific PPE. That's exactly what the SDS format is built to do.

Comparing SDSs for chemicals you use is one of the most practical things a safety-conscious small business can do. It helps you spot patterns in your PPE requirements instead of treating each chemical as a fresh mystery.

Where can you download free material safety data sheet PDFs?

The best source is always the manufacturer or distributor of the specific product you're using. OSHA requires them to provide the SDS, and the product-specific SDS is the only one that reflects the actual formulation, including concentration and proprietary ingredients disclosed to the extent required by law. Most large chemical suppliers run SDS portals where you can search by product name or CAS number.

For pure substances (single-ingredient chemicals), several free databases are genuinely useful:

• OSHA's Hazard Communication page links to SDS resources and guidance ^[1].
• NIOSH's International Chemical Safety Cards (ICSCs) cover several hundred common substances and are public domain ^[6].
• The CDC's NIOSH Pocket Guide to Chemical Hazards is online and covers exposure limits for over 600 chemicals ^[7].
• Sigma-Aldrich / MilliporeSigma keeps one of the largest public SDS libraries, with PDFs downloadable by product name or CAS number.
• Fisher Scientific and VWR have similar public search tools.
• ChemIDplus (a National Library of Medicine database) provides toxicological data that often supplements an SDS.

One warning. Third-party SDS aggregator sites (sites that collect and re-host SDS PDFs from many manufacturers) can carry outdated versions. If you're pulling an SDS from an aggregator, confirm the revision date in Section 16 and compare it against the manufacturer's current version. A 2015 SDS for a product reformulated in 2021 hands you the wrong hazard classification and the wrong exposure limits.

For common chemicals you use, download the SDS straight from your supplier's site, save it to your SDS binder (physical or electronic), and note the revision date so you know when to check for updates.

How do you set up an SDS binder that passes an OSHA inspection?

OSHA doesn't dictate the format of your SDS binder, but it does require that the binder is accessible, organized well enough that employees can find what they need fast in an emergency, and complete (one SDS for every hazardous chemical on your chemical inventory list) ^[1].

Here's a practical approach that works for most small businesses:

Step 1: Build a chemical inventory first. Walk every area of your facility and list every chemical product on hand. Include cleaning products, lubricants, adhesives, paints, solvents, and any process chemicals. This list is the backbone of your hazard communication program and tells you exactly which SDSs you need.

Step 2: Organize the binder by work area or alphabetically. Both work. By work area is usually better for larger facilities, because the binder in the paint room only holds SDSs for that room. Alphabetical is easier to maintain for smaller operations.

Step 3: Print a table of contents and put it in the front. This is the thing that impresses an OSHA inspector and, more to the point, helps a panicked employee find the right SDS in 30 seconds during a spill.

Step 4: Date each SDS. Note when you downloaded it. Set a calendar reminder to verify the manufacturer's current version once a year.

Step 5: Train employees on where the binder is and how to use it. Training is required under 29 CFR 1910.1200(h), and the SDS binder is only useful if workers actually know where it is and can read the relevant sections.

If you use an electronic system, make sure the terminal or device is in the work area (not only in the office), that employees know the login, and that you have a documented backup plan for power or internet outages. OSHA has approved electronic systems but will expect to see the backup procedure in writing ^[2].

Building your full written hazard communication program, beyond the binder, takes longer than most small business owners expect. If you want to speed that up, SafetyFolio's safety program generator walks you through the whole HazCom written program in about 15 minutes.

What should employees be trained to find on an SDS PDF?

Training under 29 CFR 1910.1200(h) must cover how to read an SDS, beyond just where the binder is ^[1]. In practice, employees need to open any SDS and quickly locate a handful of things.

For day-to-day work, the sections that matter most are:

• Section 2 for the hazard summary. The signal word (Danger vs. Warning) and hazard statements tell workers what they're dealing with in plain language.
• Section 4 for first aid. If someone gets a chemical in their eye, they need to know right away whether to flush with water, for how long, and whether the exposure needs emergency medical evaluation.
• Section 7 for safe handling. This is where storage incompatibilities and special handling procedures live.
• Section 8 for PPE. This section tells workers which gloves, goggles, or respirator type is required for the task at hand.

For emergency response, add:

• Section 5 (fire response) and Section 6 (spill response).

A useful training exercise: pick three chemicals from your inventory, open the SDSs, and walk employees through finding the same pieces of information in each one. The 16-section structure keeps the information in the same place every time, and that muscle memory matters when someone is stressed.

Employees who handle hazardous chemicals should also understand the GHS pictograms, which appear in Section 2. There are nine GHS pictograms, each representing a specific hazard category (flame, skull and crossbones, health hazard, corrosion, and so on). OSHA provides a free pictogram reference card you can post near your SDS binder ^[1]. For a wider look at what your employees should know before working with chemicals, the osha training foundation matters as much as the SDS itself.

What is the difference between an MSDS and an SDS, and does it matter legally?

Legally, yes. OSHA's revised Hazard Communication Standard (29 CFR 1910.1200), effective 2012 with full compliance required by June 1, 2016, replaced the MSDS requirement with the SDS requirement ^[1]. A document formatted to the old OSHA MSDS standard (8 categories, variable format) doesn't satisfy the current requirement, even if the hazard information is accurate.

In practice, almost every supplier producing chemicals in the U.S. market has already converted to the GHS 16-section format. If you're finding true old-format MSDSs in your binder, they're probably for products you haven't bought in years. Check the product, check whether you still use it, and either get a current SDS from the supplier or pull the chemical from your inventory.

The "MSDS PDF" search term persists because people don't update their language as fast as OSHA updates its regulations. That's fine. The search term still leads you to the right documents. Just confirm that what you download has all 16 sections.

For newer employees and for osha training programs, spend a minute explaining the name change and why it happened. The GHS alignment isn't a paperwork exercise. It means an employee who worked in Mexico or Germany and now works for you already knows how to read an SDS, because the format is identical everywhere.

How do SDS requirements connect to your broader written hazard communication program?

The SDS binder is one piece of a three-part hazard communication program. The other two are container labeling and employee training. OSHA requires all three under 29 CFR 1910.1200, and an SDS binder alone doesn't satisfy the standard ^[1].

The written hazard communication program is the document that ties everything together. It describes how your facility manages each of the three elements, who's responsible for maintaining the SDS binder, how new chemicals get added to the inventory, how labels stay current on secondary containers, and how new employees get trained. OSHA requires this written program to be available to employees and OSHA inspectors on request.

For small businesses, the written program is often the missing piece. Plenty of employers have some SDSs on file and have given workers some informal chemical training, but they don't have a written document describing the system. That's the citation. Not the missing SDS, but the absence of the written program the SDS fits into.

The Hazard Communication Standard also connects to other OSHA programs. If your workplace has chemicals that require respiratory protection, you'll need a written respiratory protection program under 29 CFR 1910.134 too. If you work with acutely hazardous chemicals in threshold quantities, you may have Process Safety Management obligations under 29 CFR 1910.119. The SDS is often the document that decides whether those thresholds apply.

Your hazard communication program needs to be living documentation. Every time you add a chemical, buy a new cleaning product, or switch suppliers, the program needs updating. The SDS binder, the chemical inventory, and the written program should all match each other. When they don't, that mismatch is exactly what an OSHA inspector will find.

What are the most common SDS violations OSHA cites, and how do you avoid them?

Hazard Communication is perennially one of OSHA's top 10 most cited standards ^[8]. In fiscal year 2023, it ranked second overall with 3,213 violations. The SDS-related violations that show up most often are:

No SDS for a chemical on the inventory. This is usually a gap in the intake process. New chemicals arrive, someone forgets to request the SDS from the supplier, and the binder is incomplete. Fix: build a procurement checklist that requires an SDS on file before a new chemical enters the facility.

SDS not accessible to employees during all shifts. The binder is in the office, which is locked at night. Or the electronic system requires a login that night shift workers don't have. Fix: post the binder in the work area, or make sure the electronic terminal is unlocked and in the work area at all times.

Outdated SDS on file. The product has been reformulated, but the employer is still using the 2008 version. Fix: review Section 16 of each SDS annually and check the manufacturer's website for newer versions.

SDS not in the 16-section GHS format. Old-format MSDSs still in the binder. Fix: do a full audit, check for the 16-section structure, and replace any that don't have it.

No written hazard communication program. The SDS binder exists but there's no written program describing how HazCom is managed. Fix: write the program. OSHA provides a free template on OSHA.gov ^[1].

Employee training not documented. Training happened but there are no records. Fix: document every training session with a sign-in sheet noting the date, topics covered, and trainer name.

The incident report process is often where SDS gaps first surface. An employee gets hurt or sick from a chemical exposure, you investigate, and you find the SDS was missing or the worker didn't know where to look. Fixing the SDS program before an incident is always cheaper than fixing it after.

How does the SDS connect to other safety programs, like lockout/tagout and PPE?

The SDS is a data source that feeds multiple other OSHA programs. It's not a standalone document.

For lockout tagout (29 CFR 1910.147), the SDS doesn't apply directly, but if maintenance workers are servicing equipment that holds hazardous chemicals (cleaning tanks, chemical feed systems, and the like), the SDS for the chemicals in that equipment tells them what PPE is required for the specific task of releasing residual chemical energy.

For the PPE program (29 CFR 1910.132), Section 8 of the SDS is directly referenced. The written PPE program must include a hazard assessment, and Section 8 of each chemical's SDS gives you the manufacturer's recommended minimum PPE. If the SDS says "chemical splash goggles and neoprene gloves," that's the starting point for your PPE specification. Your own workplace conditions may require more.

For respiratory protection (29 CFR 1910.134), Section 8 tells you whether an air-purifying respirator is adequate or whether the substance requires supplied air. It also gives you the cartridge type. That's the information that goes into your written respiratory protection program.

For the incident report process, the SDS is the reference document for chemical exposure incidents. When someone reports exposure to a chemical, Section 4 (first aid) and Section 11 (toxicological information) guide the immediate response and help the treating physician understand what happened.

All of this is why OSHA calls the hazard communication standard a "right to know" law. The SDS is how workers gain the specific knowledge they need to work safely with each chemical they touch. The program fails when the SDS is on file but nobody knows how to find it or use it.

Frequently asked questions

Is an MSDS the same as an SDS?

Yes, they refer to the same document type. OSHA replaced the term "material safety data sheet" (MSDS) with "safety data sheet" (SDS) when it revised 29 CFR 1910.1200 to align with the GHS in 2012, with full compliance required by June 1, 2016. The new SDS uses a standardized 16-section format where the old MSDS had only 8 required categories. If a document labeled MSDS has all 16 GHS sections, it satisfies the current OSHA requirement.

Where can I find a free material safety data sheet PDF for a specific chemical?

Start with your product's manufacturer or distributor, who is legally required to provide it under 29 CFR 1910.1200. For pure substances, free SDS libraries from MilliporeSigma, Fisher Scientific, and VWR are reliable. NIOSH's International Chemical Safety Cards and the NIOSH Pocket Guide cover hundreds of common industrial chemicals. Avoid aggregator sites with unknown update dates; always check the revision date in Section 16 against the manufacturer's current version.

How long do I have to keep safety data sheets?

OSHA doesn't set a retention period for SDSs in most general industry applications. But under 29 CFR 1910.1020, when an SDS is used as an employee exposure record for a hazardous substance, it must be retained for 30 years. The practical advice most safety professionals give is to keep all SDSs for at least 30 years, especially for substances with potential long-latency health effects like silica, solvents, or heavy metals.

Does OSHA require SDSs to be in English?

Yes. OSHA requires SDSs to be in English, per 29 CFR 1910.1200(g)(8). But if you have employees who aren't proficient in English, the hazard communication standard's training requirement effectively requires you to communicate the SDS information in a language workers understand. Many suppliers offer SDS PDFs in Spanish and other languages. You can use translated versions as supplements to the required English version.

Can I store my SDS files electronically instead of in a paper binder?

Yes. OSHA has confirmed in multiple letters of interpretation that electronic SDS systems satisfy the accessibility requirement, provided employees can access the system immediately during their shift without barriers, the system is available in the work area (not only in an office), and there's a documented backup procedure for system outages. A printed backup binder kept on-site is the simplest backup plan for most small businesses.

What is on the material safety data sheet for calcium chloride?

A calcium chloride SDS typically carries a GHS "Danger" signal word due to a Serious Eye Damage Category 1 classification. Section 8 references ACGIH TLV thresholds for dust (10 mg/m3 inhalable). Section 10 notes incompatibility with zinc and strong bases. Section 7 addresses its hygroscopic nature and storage requirements. Workers handling bulk calcium chloride need chemical splash goggles, more than safety glasses, based on the eye hazard classification.

What hazards does the calcium carbonate safety data sheet list?

Calcium carbonate in its pure form typically carries no GHS hazard classification, meaning it doesn't meet the threshold for a classified chemical hazard. But the SDS will document respiratory irritation from dust exposure and reference OSHA's PNOR PEL of 15 mg/m3 total dust and 5 mg/m3 respirable dust under 29 CFR 1910.1000. Operations that generate significant airborne calcium carbonate dust, like cutting limestone or handling bulk powder, may require dust masks or half-face respirators.

What happens if OSHA inspects and I'm missing an SDS for a chemical I use?

A missing SDS is typically cited as a serious violation of 29 CFR 1910.1200(g). OSHA's maximum penalty for a serious violation is $16,131 per violation as of 2024, and each missing SDS can be a separate violation. In practice, inspectors often group related violations, but a systematic SDS gap (multiple missing sheets, no binder at all) can result in willful or repeat classification with penalties up to $161,323 per violation.

How often do I need to update my SDS files?

OSHA requires manufacturers to revise an SDS within three months of discovering significant new hazard information. As an employer, you should request updated SDSs from suppliers whenever they notify you of a reformulation or reclassification. As a practical matter, auditing your entire SDS binder once a year is good practice: check Section 16 of each document for the revision date, then verify it against the manufacturer's current version on their website.

Does a safety data sheet tell me what PPE to wear?

Yes. Section 8 (Exposure Controls/Personal Protective Equipment) is where PPE recommendations appear. It lists the type of gloves, eye and face protection, respiratory protection, and skin protection required or recommended for the chemical. These are minimum recommendations from the manufacturer. Your own workplace conditions (higher temperatures, splashing, confined spaces) may require you to specify more protective equipment than Section 8 recommends.

Do I need an SDS for consumer products like cleaning sprays or WD-40?

Generally, yes, if those products are used in the workplace and employees are exposed to them. OSHA's hazard communication standard exempts consumer products only when they're used "in the same manner, duration, and frequency as a normal consumer would use them" (29 CFR 1910.1200(b)(6)(ix)). If a cleaning product is used in larger quantities, more frequently, or in enclosed spaces compared to typical household use, the exemption may not apply and an SDS is required.

How do I read a safety data sheet quickly in an emergency?

Go to Section 4 (first aid) for exposure treatment, Section 5 (firefighting) if there's a fire, and Section 6 (accidental release) for spill response. Those three sections have the immediate action information. Section 1 has the manufacturer's 24-hour emergency phone number; many SDSs list CHEMTREC (1-800-424-9300) as the emergency contact. Train your team on this navigation pattern before an emergency, not during one.

What is a GHS pictogram, and how does it relate to the SDS?

GHS pictograms are nine standardized symbols that appear on chemical labels and in Section 2 of the SDS. Each represents a hazard category: a flame for flammables, a skull for acutely toxic substances, an exclamation mark for irritants, a health hazard symbol for carcinogens and respiratory sensitizers, and others. They give an immediate visual cue that supplements the written hazard statements. OSHA requires employees to be trained on all GHS pictograms under 29 CFR 1910.1200(h).

Can I create my own SDS for a product I manufacture in-house?

Yes, and you're legally required to do so if you manufacture or import a hazardous chemical, even if only for internal use. Under 29 CFR 1910.1200(g)(1), chemical manufacturers and importers must prepare an SDS. If your business blends, reformulates, or produces a hazardous substance, you're the manufacturer of record for that product and must prepare a compliant 16-section GHS SDS. OSHA's guidance documents on preparing SDSs are available on OSHA.gov.

Sources

1. OSHA, Hazard Communication Standard 29 CFR 1910.1200: OSHA requires an SDS for each hazardous chemical in the 16-section GHS format, accessible to employees during every shift, with full compliance required by June 1, 2016
2. OSHA, Hazard Communication page: OSHA accepts electronic SDS systems if employees can access them without barriers during their shift and a reliable backup exists for outages
3. OSHA, 29 CFR 1910.1020 Access to Employee Exposure and Medical Records: SDSs used as employee exposure records must be retained for 30 years
4. OSHA, OSHA Civil Penalties page: Maximum OSHA penalty for a serious violation is $16,131 per violation as of 2024; willful or repeat violations up to $161,323 per violation
5. OSHA, 29 CFR 1910.1000 Table Z-1 Air Contaminants: OSHA PEL for particulates not otherwise regulated (PNOR) is 15 mg/m3 total dust and 5 mg/m3 respirable dust, applicable to calcium carbonate
6. NIOSH, International Chemical Safety Cards (ICSCs): NIOSH hosts public-domain International Chemical Safety Cards covering hundreds of common industrial substances
7. NIOSH, Pocket Guide to Chemical Hazards: The NIOSH Pocket Guide covers exposure limits and hazard information for over 600 chemicals and is available free online
8. OSHA, Top 10 Most Cited Standards FY2023: Hazard Communication (29 CFR 1910.1200) was the second most cited OSHA standard in fiscal year 2023 with 3,213 violations
9. OSHA, 29 CFR 1910.1200(b)(6)(ix) Scope and Application: Consumer products are exempt from HazCom requirements only when used in the same manner, duration, and frequency as normal consumer use
10. ACGIH, 2024 TLVs and BEIs Documentation: ACGIH TLV for inhalable particulate matter not otherwise specified is 10 mg/m3; for respirable particulate matter 3 mg/m3, referenced in SDS Section 8 for calcium chloride and calcium carbonate