This section is from the book "Alcohol, Its Production, Properties, Chemistry, And Industrial Applications", by Charles Simmonds. Also available from Amazon: Alcohol: Its Production, Properties, Chemistry, And Industrial Applications.
The most important of these industrially are the dimethyl sulphate and the salts of monoethyl sulphate. The former is much used as a methylating agent, especially for phenols and for amines of the aromatic series. The reaction in the latter case is expressed by the equation: - (CH3)2SO4 + 2RNH1 = RNH1CH3HSO4 + RNH(CH3).
These alkyl sulphates serve as a cheap raw material for use in
1 Millon, Ann. Chim. Phys., 1843, [iii], 8, 233.
2 Lossen: Annalen, 18G8, Suppl. 0, 220.
A A such operations as the foregoing. The dimethyl compound especially has been of signal service in the synthetic dye industry.