Isoprene

Chemical NameIsoprene
Synonym(s)1,3-Butadiene, 2-methyl- (CA INDEX NAME) | 2-Methyl-1,3-butadiene | 2-Methylbutadiene | 3-Methyl-1,3-butadiene | Isopentadiene | NSC 9237 | b-Methylbivinyl
CASRN78-79-5
De minimis Limit %0.1
M,P/OU Threshold (lb)25,000/10,000
Listing TypeIndividually listed chemical
Effective Date01-JAN-11
Chemical QualifierNo
MetalNo
Chemical of Special ConcernNo
Per- or Polyfluoroalkyl SubstanceNo

Rulemaking Changes Affecting This Chemical

StatusEffective Reporting YearFR Proposed RuleFR Final Rule
Added201175 FR 17333 (4/6/2010)75 FR 72727 (11/26/2010)

Basis of OSHA Carcinogens

IARCNTPOSHA-Z
2BRA–
Structural image
Structural representation of Isoprene