C2H6O4S
126.13 g/mol
Industrial ChemicalDanger
DIMETHYL SULFATE
CAS77-78-1EC201-058-1
Category
Industrial Chemical
Compound Class
Other
Primary Use
Methylating agent in organic synthesis
Dimethyl sulfate is an industrial chemical widely employed as a methylating agent in organic synthesis. It is used in the manufacturing of various organic chemicals, dyes, perfumes, and in the separation of mineral oils.
Methylating agent in organic synthesisManufacture of dyes and perfumesSeparation of mineral oils
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 77-78-1
Related Compounds
StrongForm Family
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CAS553-90-2
Dimethyl ester of oxalic acid intermediate
StrongForm Family
Dimethyl maleate
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Dienophile for Diels-Alder reactions
StrongForm Family
Dimethyl fumarate
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pharmaceutical raw material
ApplicationSame Use
Methyl p-toluenesulfonate
CAS80-48-8
methylating agent in organic synthesis
ReferenceSame Category
Trimethylolethane
CAS77-85-0
manufacture of polyesters and alkyd resins
ReferenceSame Category
Acetyl tributyl citrate
CAS77-90-7
plasticizer for vinyl resins
ReferenceSame Category
Tributyl citrate
CAS77-94-1
plasticizer and solvent for lacquers
ReferenceSame Category
Trimethylolpropane
CAS77-99-6
Building block for polymer industry
Safety Reference
Danger
H301Toxic if swallowed
H314Causes severe skin burns and eye damage
H317May cause an allergic skin reaction
H330Fatal if inhaled
H341Suspected of causing genetic defects
H350May cause cancer
H310Fatal in contact with skin
H318Causes serious eye damage
H319Causes serious eye irritation
H335May cause respiratory irritation
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
H227
H402Harmful to aquatic life
H361Suspected of damaging fertility or the unborn child
H370Causes damage to organs
H373May cause damage to organs through prolonged or repeated exposure
Customs Tariff Classification
The international HS code for DIMETHYL SULFATE (CAS 77-78-1) 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
dimethyl sulfate
InChIKey
VAYGXNSJCAHWJZ-UHFFFAOYSA-N
SMILES
COS(=O)(=O)OC
Synonyms (42)
- DIMETHYL SULFATE
- DIMETHYL SULFATE (13C2)
- DMS (methyl sulfate)
- Dimethoxysulfone
- Dimethyl monosulfate
- Dimethyl sulphate
- Dimethylester kyseliny sirove
- Dimethylsulfaat
- Dimethylsulfaat [Dutch]
- Dimethylsulfat
- Dimethylsulfat [Czech]
- Dimetilsolfato
- Dimetilsolfato [Italian]
- Dwumetylowy siarczan
- Dwumetylowy siarczan [Polish]
- Methyl sulfate (VAN)
- Methyl sulfate, Me2SO4
- Methyle (sulfate de)
- Methyle (sulfate de) [French]
- Sulfate de dimethyle
- Sulfate de dimethyle [French]
- Sulfate de methyle
- Sulfate dimethylique
- Sulfate dimethylique [French]
- Sulfato de dimetilo
- Sulfato de dimetilo [Spanish]
- Sulfuric acid, dimethyl ester
- Sulphuric acid dimethyl ester
- dimethlysulfate
- dimethyl sulfuric acid
- dimethysulfate
- dimetylsulphate
- dirnethyl sulfate