Agent Name

Gilsonite

CAS Number

12002-43-6

Major Category

Mineral Dusts

Synonyms

Uintahite; Uintaite; [ChemIDplus] Asphaltite; Glossy pitch; [Ullmann]

Category

Other Mineral Dusts

Description

Black lustrous solid; [Merck Index] Dark brown resinous solid; [MSDSonline]

Sources/Uses

A highly pure natural bitumen found exclusively in Utah and Colorado; [Hawley] Used to make asphalt floor tiles, storage battery boxes, paints, black varnishes, lacquers, and baking enamels; Also used in hot underground piping, waterproof coatings, wire insulation, linoleum and floor tiles, paving, low grade rubber compounds, dark photogravure inks, solvent-free seam sealers in automobiles, and other applications in the oil-drilling, foundry, explosive, and nuclear graphite industries; [HSDB] A hard natural asphalt and fossil resin that is assumed to be formed by the evaporation of crude petroleum followed by chemical reactions such as oxidation and polymerization; Found in Utah/Colorado, Virginia, and Syria; The Utah variety was discovered by Samuel Gilson in 1860. It consists of about 85% carbon, 10% hydrogen, and 2.5% nitrogen. It contains about 60% asphaltenes and 40% resins; [Ullmann]

Comments

An irritant and skin sensitizer; [Hawley] An eye and respiratory tract irritant; [HSDB] A skin irritant; May cause skin sensitization; [CAMEO] May cause skin photosensitization; [NTP] High concentrations of dust can be explosive; A mild irritant; [MSDSonline] See "Asphalt fumes."

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Health Studies

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Processes

Industrial Processes with risk of exposure: