Safety Data Sheets (SDS) — formerly called Material Safety Data Sheets (MSDS) — are standardized documents that provide comprehensive hazard and safety information about chemical substances and mixtures. Under the GHS and OSHA’s Hazard Communication Standard, SDS must follow a standardized 16-section format. Knowing how to read and use an SDS is an essential skill for anyone who works with chemicals.
Sections 1–4: Identification and Hazard Overview
Section 1 (Identification) provides the product name, manufacturer contact information, recommended uses, and uses that are advised against. Section 2 (Hazard Identification) is one of the most critical sections, listing all GHS hazard classifications, signal words, hazard and precautionary statements, and pictograms. Section 3 (Composition/Information on Ingredients) identifies chemical ingredients and their concentration ranges. Section 4 (First-Aid Measures) describes emergency first aid procedures for each exposure route.
Sections 5–8: Fire, Accidental Release, Handling, and Exposure Controls
Section 5 (Fire-Fighting Measures) covers suitable extinguishing media, specific hazards during fires, and special protective equipment for firefighters. Section 6 (Accidental Release Measures) provides spill response procedures. Section 7 (Handling and Storage) gives precautions for safe handling and storage conditions. Section 8 (Exposure Controls/Personal Protection) is especially important for occupational health — it lists occupational exposure limits (OELs) such as PELs and TLVs, and specifies required personal protective equipment (PPE) including respiratory protection, gloves, and eye protection.
Sections 9–16: Physical Properties, Toxicology, and Regulatory Info
Section 9 (Physical and Chemical Properties) lists key physical properties like boiling point, vapor pressure, and flash point. Section 11 (Toxicological Information) provides data on acute toxicity (LD50/LC50), skin and eye irritation, sensitization, carcinogenicity, and reproductive toxicity. Section 12 (Ecological Information) covers environmental hazards. Section 15 (Regulatory Information) lists applicable regulations such as OSHA, EPA, REACH, and state right-to-know laws. Always consult the SDS before working with any chemical, and ensure all workers have access to and training on relevant SDS.
