C4H10O4S
154.19 g/mol
Industrial ChemicalDanger
Diethyl sulfate
CAS64-67-5EC200-589-6
Category
Industrial Chemical
Compound Class
Ester
Primary Use
Ethylating agent in chemical synthesis
Diethyl sulfate is an organosulfur compound that appears as a colorless, oily liquid with a faint peppermint odor. It is toxic, combustible, and likely carcinogenic, and is primarily used as an ethylating agent in chemical synthesis.
Ethylating agent in laboratory and industrial chemical synthesis
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
Relevant lists:California Proposition 65
CAS 64-67-5
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Safety Reference
Danger
H302Harmful if swallowed
H312Harmful in contact with skin
H314Causes severe skin burns and eye damage
H332Harmful if inhaled
H340May cause genetic defects
H350May cause cancer
H311Toxic in contact with skin
H318Causes serious eye damage
H331Toxic if inhaled
H412Harmful to aquatic life with long lasting effects
H371May cause damage to organs
Customs Tariff Classification
The international HS code for Diethyl sulfate (CAS 64-67-5) is 2920.90.
HS code (international, 6-digit)
2920.90
EU CN code (8-digit)
2920 90 10
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
diethyl sulfate
InChIKey
DENRZWYUOJLTMF-UHFFFAOYSA-N
SMILES
CCOS(=O)(=O)OCC
Synonyms (18)
- DES (VAN)
- Diaethylsulfat
- Diaethylsulfat [German]
- Diethyl Monosulfate
- Diethyl sulfate
- Diethyl sulphate
- Diethyl tetraoxosulfate
- Diethylester kyseliny sirove
- Ethyl sulfate (Et2SO4)
- Montelukast Impurity 15
- Sufuric Acid Diethyl Ester
- Sulfuric acid, diethyl ester
- Sulphuric acid diethyl ester
- diethylsulfuric acid
- ethyl ethoxysulfonate