Alphabetic Index of Sampling and Analytical Methods - M

This chemical inventory is OSHA's premier one-stop shop for occupational chemical information. It compiles information from several government agencies and organizations. Information available on the pages includes:

  • Chemical identification and physical properties
  • Exposure limits
  • Sampling information, and
  • Additional resources.

OSHA Standards and Exposure Limits

Employers must comply with a number of standards where employees are potentially exposed to chemical hazards. These include OSHA's Permissible Exposure Limits PELs for about 400 substances, which can be found as follows:

  • General Industry: 29 CFR 1910.1000, Toxic and Hazardous Substances
    • Air contaminants and Z1, Z2, Z3 tables
    • 29 CFR 1910.1001 - 29 CFR 1910.1018
    • 29 CFR 1910.1025- 29 CFR 1910.1053
  • Construction: 29 CFR 1926.1101, Toxic and Hazardous Substances
    • 29 CFR 1926.1101 – 29 CFR 1926.1153
  • Maritime: 29 CFR 1915.1000, Toxic and Hazardous Substances
    • Substance-specific standards

OSHA's PELs are included in the "Exposure Limits" table for individual chemicals in the database. In addition, OSHA has separate substance-specific standards, which can be found in the "Notes" section of the "Exposure Limits" table.

Other OSHA standards that generally apply to hazardous substances include the Hazard Communication standard (1910.1200) and the Respiratory Protection standard (1910.134). Employers may also need to provide personal protective clothing (1910.132) where there is a potential hazard from skin contact with chemicals, or eye and face protection to guard against chemical splashes (1910.133).

 

The results below may be sorted by the chemical name, CAS # or analyte code by clicking on the column heading.
Substance
METHYL FORMATE [PV2041] Partially Validated
MALEIC ANHYDRIDE [86] Fully Validated
M-TOLUIDINE [73] Fully Validated
METHYL ISOAMYL KETONE [PV2042] Partially Validated
MORPHOLINE [PV2123] Partially Validated
MALATHION [62] Fully Validated
METHYL ETHYL KETONE PEROXIDE [77] Fully Validated
METHYL 2-CYANOACRYLATE [55] Fully Validated
M-XYLENE-⍺,⍺'-DIAMINE [105] Fully Validated
METHOMYL [PV2114] Partially Validated
METRIBUZIN [PV2044] Partially Validated
METHYL PARATHION [PV2112] Partially Validated
METHYLENE BIS(4-CYCLOHEXYLISOCYANATE) [PV2092] Partially Validated
METHYL ISOCYANATE [54] Fully Validated
METHYL ALCOHOL (METHANOL) [5001] Fully Validated
MONOCROTOPHOS [PV2045] Partially Validated
METHOXYCHLOR [PV2038] Partially Validated
MERCURY (ARYL & INORGANIC COMPOUNDS) [ID-145] Fully Validated
MERCURY (VAPOR) [ID-140] Fully Validated
MERCURY (VAPOR) [ID-140] Backup
MOLYBDENUM, SOLUBLE COMPOUNDS [ID-125G] Fully Validated
METHYL BROMIDE [PV2040] Partially Validated
METHYLAMINE [40] Fully Validated
METHYL MERCAPTAN (METHANETHIOL) [26] Fully Validated
METHACRYLIC ACID [PV2005] Partially Validated
METHYL METHACRYLATE [94] Fully Validated
METHYL ACRYLATE [92] Fully Validated
MANEB [107] Fully Validated
MESTRANOL [PV2068] Partially Validated
METHIDATHION [PV2074] Partially Validated
METHOTREXATE [PV2146] Partially Validated
MAXIMUM NORMALIZED DP/DT (EXPLOSIBILITY) (Kst) [ID-201SG] Partially Validated