Agent Name

Dowtherm Q

CAS Number

68987-42-8

Major Category

Other Classes

Synonyms

1,1-Diphenylethane (50-60%); Ethylated benzenes (30-50%); [AIHA] Dowtherm Q Heat Transfer Fluid; [MSDSonline]

Category

Other Organic Compounds

Description

Colorless to pale yellow liquid with an aromatic odor; [MSDSonline]

Sources/Uses

Used as a heat transfer liquid in closed loop heating or cooling systems; [AIHA]

Comments

A mixture of 50-60% 1,1-Diphenylethane (612-00-0) and 30-50% ethylated benzenes (68987-42-8); [AIHA] Ethylated benzenes are also called ethylenated benzene residues and polyethylbenzene residues; Ethylated benzenes are produced from the distillation of ethylbenzene and consist primarily of polyethylbenzenes, ethyldiphenyl ethanes and small amounts of diethylbenzenes and butylbenzenes. [ChemIDplus] Causes pneumonitis if aspirated; A skin irritant; [MSDSonline] No adverse effects in a 2-week inhalation study of rats at 11.25 ppm; A mild eye irritant; In workers were exposed at levels of 0.02 to 0.03 ppm, no health effects were noted. [AIHA]

Exposure Assessment
WEEL

1 ppm

Vapor Pressure

0.01 mm Hg

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Other Information

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