Диметиламин гидрохлорид

Описание

Dimethylamine hydrochloride is the raw material of organic synthesis, the catalyzer of analysis as an acetylize, and the preparation of azoviolet and dimethylamine aqueous solution. Dimethylamine hydrochloride deoxidation is very capable, and corrodibility is vital, so be usually used in cleaning-type soldering flux. Preparation technology is for slowly splashing into hydrochloric acid in dimethylamine for tradition, and the speed that splashes into is no more than 15 ℃ with temperature, and pH=7-8 is limited. After the reaction finishes, activated carbon decolorizing is added, the filtrate is adjusted to pH=3-4 with hydrochloric acid, decompression is steamed water to the greatest extent, obtaining dimethylamine hydrochloride.

Химические свойства

White, foliage-like crystals with a melting point of 171°C. Highly soluble in water, soluble in alcohol and chloroform, and insoluble in ether. Exhibits deliquescence.

Использование

Dimethylamine hydrochloride is a precursor to several industrially significant compounds.

прикладной

Dimethylamine hydrochloride serves as a foundational material for organic synthesis and is utilized as a catalyst and magnesium reagent in acetylation analysis. It has been used in producing hexamethylmelamine-methyl-14C and in preparing standard solutions of methylamine (MA), dimethylamine (DMA), trimethylamine (TMA), and trimethylamine-N-oxide (TMAO) to assess the presence of methylamines and trimethylamine-N-oxide in particulate matter.

Подготовка

Dimethylamine hydrochloride is obtained from the salt formation of dimethylamine and hydrochloric acid.

Методы очистки

Crystallise the salt from hot CHCl3 or absolute EtOH. It also recrystallises from MeOH/ether solution. Dry it in a vacuum desiccator over H2SO4, then P2O5. Hygroscopic. [Beilstein 4 IV 132.]