CAS Number: 64-67-5. A colorless, oily liquid used as an
ethylating agent and as a chemical intermediate. Chemical
formula = C4H10O4S. Molecular weight = 154.19 g/mol.
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Diethyl sulfate is used as an ethylating agent and as a chemical
intermediate. No information is available on the acute
(short-term), chronic (long-term), reproductive, or developmental
effects of diethyl sulfate in humans. In an epidemiological
study, an excess mortality rate from laryngeal cancer was
associated with occupational exposure to high concentrations of
diethyl sulfate. In one study, rats orally exposed to diethyl
sulfate developed tumors in the forestomach. EPA has not
classified diethyl sulfate with respect to potential
carcinogenicity. The International Agency for Research on Cancer
(IARC) has classified diethyl sulfate as a Group 2A, probable
human carcinogen.