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Diethyl sulfate (DES) is an organosulfur compound with the formula (C 2 H 5) 2 SO 4. [ 1 ] [ 2 ] It occurs as a colorless, oily liquid with a faint peppermint odor. It is toxic , combustible , and likely carcinogenic chemical compound .
A less common family of organosulfates have the formula RO-SO 2-OR'. They are prepared from sulfuric acid and the alcohol. The main examples are diethyl sulfate and dimethyl sulfate, colourless liquids that are used as reagents in organic synthesis. These compounds are potentially dangerous alkylating agents. Dialkylsulfates do not occur in nature.
Dimethyl sulfate (DMS) is a chemical compound with formula (CH 3 O) 2 SO 2. As the diester of methanol and sulfuric acid, its formula is often written as (CH 3) 2 SO 4 or Me 2 SO 4, where CH 3 or Me is methyl. Me 2 SO 4 is mainly used as a methylating agent in organic synthesis. Me 2 SO 4 is a colourless oily liquid with a slight onion-like odour.
Diethyl sulfide (British English: diethyl sulphide) is an organosulfur compound with the chemical formula (CH 3 CH 2) 2 S. It is a colorless, malodorous liquid. It is a colorless, malodorous liquid. Although a common thioether , it has few applications.
The sulfate ion carries an overall charge of −2 and it is the conjugate base of the bisulfate (or hydrogensulfate) ion, HSO − 4, which is in turn the conjugate base of H 2 SO 4, sulfuric acid. Organic sulfate esters, such as dimethyl sulfate, are covalent compounds and esters of sulfuric acid.
DIPEA is commercially available. It is traditionally prepared by the alkylation of diisopropylamine with diethyl sulfate. [1] Pure DIPEA exists as a colorless liquid, although commercial samples can be slightly yellow. If necessary, the compound can be purified by distillation from potassium hydroxide [2] or calcium hydride. [3]
DEPARTMENT OF HEALTH AND HUMAN SERVICES OBSERVATION 2 There are no written procedures for production and process controls designed to assure that the drug products ...
If the temperature exceeds 140 °C, the ethyl sulfate product tends to react with residual ethanol starting material, producing diethyl ether. If the temperature exceeds 170 °C in a considerable excess of sulfuric acid, the ethyl sulfate breaks down into ethylene and sulfuric acid. [12] [13]