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Registry of Toxic Effects of Chemical Substances (RTECS)

Styrene, o-methyl-

RTECS #

WL5075900

CAS #

611-15-4

Updated

July 2013

Molecular Weight

118.19

Molecular Formula

C9H10

Synonyms

1-Ethenyl-2-methylbenzene
1-Methyl-2-vinylbenzene
2-Methylstyrene
2-Vinyltoluene
Benzene, 1-ethenyl-2-methyl- (9CI)
o-Methylstyrene
o-Vinyltoluene

Mutation Data and Reference

System TestRoute/Organism/TissueDoseReference
sister chromatid exchangelymphocyte/human1 mmol/LMUREAV 116,379,1983

Reviews

OrganizationStandardReference
International Agency for Research on Cancer (IARC)Cancer Review:Human Inadequate EvidenceIMEMDT 60,373,1994
International Agency for Research on Cancer (IARC)Cancer Review:Animal LACK CARCINOGENICITYIMEMDT 60,373,1994
International Agency for Research on Cancer (IARC)Cancer Review:Group 3IMEMDT 60,373,1994

Standards and Regulations

OrganizationStandardReference
Occupational Exposure Limit-BELGIUMtime-weighted average 50 ppm (246 mg/m3), short term exposure limit 100 ppm(490 mg/m3), MAR2002
Occupational Exposure Limit-DENMARKtime-weighted average 25 ppm (120 mg/m3), MAY2011
Occupational Exposure Limit-ICELANDtime-weighted average 25 ppm (120 mg/m3), skin, NOV2011
Occupational Exposure Limit-MEXICOtime-weighted average 50 ppm (240 mg/m3);short term exposure limit 100 ppm (485 mg/m3), 2004
Occupational Exposure Limit-SWITZERLANDMAK-week 50 ppm (240 mg/m3), KZG-week 100 ppm (480 mg/m3), JAN2011
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