dimethyl sulfate

CAS No. 77-78-1

Formula: C2H6O4S
Basic Info

Dimethyl sulfate is a chemical compound with formula (CH3O)2SO2. As the diester of methanol and sulfuric acid, its formula is often written as (CH3)2SO4 or even Me2SO4, where CH3 or Me is methyl. Me2SO4 is mainly used as a methylating agent in organic synthesis.
Under standard conditions, Me2SO4 is a colourless oily liquid with a slight onion-like odour (although smelling it would represent significant exposure). Like all strong alkylating agents, Me2SO4 is extremely toxic. Its use as a laboratory reagent has been superseded to some extent by methyl triflate, CF3SO3CH3, the methyl ester of trifluoromethanesulfonic acid.

Formula
C2H6O4S
Molecular Weight
126.132
Exact Mass
125.999
LogP
0.6048
PSA
60.98
Synonyms

Sulfuric acid, dimethyl ester

METHYL SULFATE

Dimethylsulfat

dimethyl sulphate

Methanesulfate

Sulfuricacid, dimethyl ester

Dimethylsulfaat

Dimetilsolfato

dimethyl sulafte

DIMETHYL SULFATE

Methylsulphate

sulfuric acid dimethyl ester

Dimethoxysulfone

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Properties
Appearance & Physical State
Clear oily liquid
Density
1.333
Boiling Point
188ºC
Melting Point
-32ºC
Flash Point
83ºC
Refractive Index
1.386-1.388
Stability
Stable; combustible. Incompatible with strong oxidizing agents, strong bases including ammonia. Moisture-sensitive.
Storage Condition
2-8ºC
Safety Info
Safety Statements
S45-S53
Risk Statements
R25; R26; R34; R43; R45; R68
HS Code
2920909090
RIDADR
UN 1595
Hazard Class
6.1(a)
Caution Statement
P201; P260; P280; P301 + P310 + P330; P303 + P361 + P353; P304 + P340 + P310; P305 + P351 + P338; P308 + P313; P403 + P233
Hazard Codes
Spectrum
NMR Spectrum 1H NMR : parameter in CDCl3
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IR Spectrum IR : liquid film
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Mass Spectrum Mass
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