Agent Name

Polyisoprene

CAS Number

9003-31-0

Formula

(C5-H8)x-

Major Category

Plastics & Rubber

Synonyms

1,4-Polyisoprene; 2-Methyl-1,3-butadiene, homopolymer; 1,3-Butadiene, 2-methyl-, homopolymer; Betaprene H; Isoprene D; Isoprene oligomer; Isoprene polymer; Isoprene, polymers; Poly(2-methyl-1,3-butadiene); cis-1,4-Polyisoprene; trans-Polyisoprene; [ChemIDplus]

Category

Polymers

Description

Clear colorless or light yellow liquid or beige to yellow solid; [CHEMINFO] Solid; [MSDSonline]

Sources/Uses

A major component of natural rubber; Also found in over 200 other plant species; Used to make tires, elastomers, foam rubber, shoes, etc.; [HSDB]

Comments

A complex poly(isoprene) polymer mixture of varying chain lengths, branches, isomers, and molecular weights (300-65,000) containing impurities such as catalyst residues (i.e. aluminum alkyls), terpene isomers (e.g. limonene), unsaturated polycyclic and aromatic compounds, and up to 5% additives (i.e., antioxidants); [CHEMINFO] May cause skin and respiratory sensitization after prolonged contact based on latex allergies; [eChemPortal: ERMA] Latex contains cis-1,4-polyisoprene, but the allergens that causes hypersensitivity are probably soluble proteins. [Marks, p. 359] May cause irritation; [MSDSonline]

Exposure Assessment
Skin Designation (ACGIH)

Yes

TLV (ACGIH)

0.0001 mg/m3, inhalable fraction

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