OSHA Occupational Chemical Database

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.
839
OSHA Chemical Data Table
Chemical Name CAS # Analyte code (IMIS #) Synonyms
MESTRANOL 72-33-3
  • M305

3-methoxy-17-⍺-19-norpregna-1,3,5(10)-trien-20-yn-17-ol; Compound 33355; 𝛿-MVE

METHACRYLIC ACID 79-41-4
  • M339

methacrylic acid (glacial); methacrylic acid (inhibited); α-methacrylic acid; 2-methylacrylic acid; 2-methylpropenoic acid

METHIDATHION 950-37-8
  • M105

Ultracide (TM); Supracide (TM); somonil; Fisons NC 2964; DMTP; ENT 27193

METHOMYL 16752-77-5
  • 1644
 

Lannate; methyl N-((methylamino)carbonyl)oxy)ethanimidothioate; S-methyl-N-(methylcarbamoyloxy)thioacetimidate

METHOTREXATE 59-05-2
  • M106

amethopterin; 4-amino-l0-methylfolic acid; 1-glutamic acid, N-(4-(((2,4-diamino-6-pteridinyl)methyl)methylamino))benzoyl; glutamic acid, N-(p-(((2,4-diamino-6-pteridinyl)methyl)methylamino)benzoyl)-, L; methopterin; amethopterine; HDMTX; MTX; L-N-(p-(((2,4-diamino-6-pteridinyl)methyl)methylamino)benzoyl) glutamic acid

72-43-5
  • 1646
 

p,p'-dimethoxydiphenylftrichloroethane; DMDT; methoxy-DDT; 2,2-bis(p-methoxyphenyl)-1,1,1-trichloroethane; 1,1,1-trichloro-2,2-bis-(p-methoxyphenyl)ethane

110-43-0
  • 1675

amyl methyl ketone; n-amyl methyl ketone; 2-heptanone

METHYL 2-CYANOACRYLATE 137-05-3
  • 1735
 

mecrylate; methyl cyanoacrylate; methyl ⍺-cyanoacrylate; methyl ester of 2-cyanoacrylic acid; 2-propenoic acid-2-cyano-methyl ester; methyl ester

79-20-9
  • 1650
 

methyl ester of acetic acid; methyl ethanoate; methyl acetic ester

74-99-7
 

allylene; propine; propyne; 1-propyne

59355-75-8
  • 1652

MAPP gas; methyl acetylene-allene mixture; propadiene-methyl acetylene; propyne-allene mixture; propyne-propadiene mixture

96-33-3
  • 1653

methoxycarbonylethylene; methyl acrylate, inhibited; methyl ester of acrylic acid; methyl propenoate

METHYL ACRYLONITRILE 126-98-7
 

2-cyanopropene-1, 2-cyano-1-propene; isoprene cyanide; isopropenylnitrile; methacrylonitrile; à-methylacrylonitrile; 2-methylpropenenitrile

67-56-1
  • 1660

carbinol; columbian spirits; methanol; pyroligneous spirit; wood alcohol; wood naphtha; wood spirit

74-83-9
  • 1680

bromomethane; monobromomethane

74-87-3
  • 1710

chloromethane; monochloromethane

71-55-6
  • 1720

chlorothene; 1,1,1-trichloroethane; 1,1,1-trichloroethane (stabilized)

METHYL DEMETON 8022-00-2
 
 

demeton methyl; O,O-dimethyl 2-ethylmercaptoethyl thiophosphate; metasystox; methyl mercaptophos; methyl systox

METHYL ETHYL KETONE PEROXIDE 1338-23-4
  • 1750

2-butanone peroxide, MEKP, MEK peroxide

107-31-3
  • 1770
 

methyl ester of formic acid; methyl methanoate

60-34-4
  • 1794
 

MMH; monomethylhydrazine

74-88-4
  • 1772
 

iodomethane; monoiodomethane

110-12-3
  • 1776
 

isoamyl methyl ketone; isopentyl methyl ketone; 2-methyl-5-hexanone; 5-methyl-2-hexanone; MIAK; 5-methylhexan-2-one

108-11-2
  • 1670
 

isobutylmethylcarbinol; methyl amyl alcohol; 4-methyl-2-pentanol; MIBC

624-83-9
  • 1773

methyl ester of isocyanic acid; MIC; isocyanatomethane

METHYL ISOPROPYL KETONE 563-80-4
 

2-acetyl propane; isopropyl methyl ketone; 3-methyl-2-butanone; 3-methyl butan-2-one; MIPK

74-93-1
  • 1643
 

mercaptomethane; methanethiol; methyl sulfhydrate

80-62-6
  • 1774
 

methacrylate monomer; methyl ester of methacrylic acid; methyl methacrylate monomer; uninhibited; methyl-2-methyl-2-propenoate

METHYL PARATHION 298-00-0
  • 1775
 

azophos; O,O-dimethyl-O-p-nitrophenylphosphorothioate; parathion methyl; phosphorothioic acid O,O-dimethyl O-(p-nitrophenyl) ester

681-84-5
 

methyl orthosilicate; tetramethoxysilane; tetramethyl ester of silicic acid; tetramethyl silicate

METHYL VINYL KETONE 78-94-4
 

3-butene-2-one; acetyl ethylene; butenone; MVK; methylene acetone

109-87-5
  • 1655
 

dimethoxymethane; formaldehyde dimethylacetal; methoxymethyl methyl ether; methylene dimethyl ether

74-89-5
  • 1665
 

aminomethane; methylamine (anhydrous); methylamine (aqueous); monomethylamine

108-87-2
  • 1740
 
 

cyclohexylmethane; hexahydrotoluene

25639-42-3
  • 1760
 

hexahydrocresol; hexahydromethylphenol

METHYLENE BIS(4-CYCLOHEXYLISOCYANATE) 5124-30-1
  • 2651
 

dicyclohexylmethane 4,4'-diisocyanate; DMDI; bis(4-isocyanatocyclohexyl)methane; HMDI; hydrogenated MDI; reduced MDI; saturated MDI; 1,1-methylene bis(4-isocyanatocyclohexane)

101-68-8
  • 1073
 

4,4-diphenylmethane diisocyanate; MDI; 4,4-diisocyanadiphenyl-methane; methylenebis(4-phenylisocyanate); methylene bis(phenyl isocyanate); methylene di-p-phenylene ester of isocyanic acid

75-09-2
  • 1730
 

dichloromethane; methylene dichloride

101-77-9
  • 1732

4,4'-diaminodiphenylmethane; para, para'-diaminodiphenyl-methane; dianilinomethane; 4,4'-diphenylmethanediamine

METRIBUZIN 21087-64-9
  • A175
 

4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one

MICA
12001-26-2
  • 9075 (resp); request using analyte code 9130

biotite; lepidolite; margarite; muscovite; phlogopite; roscoelite

NO CAS
  • 9130 (respirable - not recommended), 9135 (total)
  • 1300

manmade mineral fibers; rock wool; slag wool; synthetic vitreous fibers

7439-98-7
  • 1790
 

molybdenum metal

7439-98-7
  • 1791

molybdenum metal

MONOCHLOROACETIC ACID 79-11-8
  • M145

Chloroacetic acid

MONOCROTOPHOS 6923-22-4
  • 2690
 

3-hydroxy-N-methylcrotonamide dimethylphosphate; Monocron

100-61-8
  • 1972

MA; (methylamino)benzene; N-methyl aniline; methylphenylamine; N-phenylmethylamine

110-91-8
  • 1797
 

diethylene imidoxide; diethylene oximide; tetrahydro-1,4-oxazine; tetrahydro-p-oxazine

121-69-7
  • 0931
 

N,N-dimethylbenzeneamine; N,N-dimethylphenylamine [Note: Also known as dimethylaniline which is a correct synonym for xylidine.]

N-(TRICHLOROMETHYLTHIO)PHTHALIMIDE (FOLPET) 133-07-3
  • F119
 

Faltan; orthopjaltan; phthaltan