Encyclopedia

Arsenic compounds


1. Arsenic trioxide (sesquioxide of arsenic, arsenious oxide, white arsenic) (As2O3). Sometimes incorrectly referred to as "arsenious acid." It is obtained by roasting nickel or silver arsenic ores or arsenopyrites. May contain impurities (arsenic sulfide, sulfur, antimony oxide, etc.).

Technical trivalent arsenic oxide is usually a crystalline white powder without odor, highly toxic (arsenical color). Glassy oxide appears as transparent amorphous mass; porcelain-like oxide appears as opaque, interlocked octahedral crystals.

Used for preserving skins or zoological specimens (sometimes used in mixture with soap), for rodent control, in the production of flypaper, for obtaining certain glass opacifiers, glass enamels or mineral green, such as Scheele's green (copper arsenite) or Schweinfurth's green (acetarsenite of copper), in small doses it is used as a medicinal agent (in treatment of dermatitis, malaria or asthma).

2. Arsenic pentoxide (As2O5). It is obtained by oxidizing arsenic trioxide or by dehydration of arsenic acid, and appears as a very toxic white powder; it slowly dissolves in water forming arsenic acid. It is used for the production of arsenic acid, as an oxidizer, etc.

3. Arsenic acids. "Arsenic acid" refers to orthoarsenic acid (H3AsO4.1/2H2O) and other hydrates of arsenic pentoxide (pyro- or meta-arsenic acid, etc.). They crystallize in the form of colorless needle-like crystals and are highly toxic.

Arsenic acid is used for the production of synthetic dyes (fuchsine, etc.), arsenates, and organic derivatives of arsenic used as medicinal drugs or insecticides

Source: "Explanations to the Harmonized System of the Russian Federation for Foreign Economic Activity (HS of Russia)" (prepared by the Customs Authority of the Russian Federation) (volume 1, sections I - VI, groups 1 - 29)

Морфология

Род

Понятие «соединения мышьяка» среднего рода.

Склонение и число

Падеж Единственное число Множественное число
Р соединения мышьяка соединения мышьяка
Д соединению мышьяка соединению мышьяка
В соединение мышьяка соединение мышьяка
Т соединением мышьяка соединением мышьяка
П соединении мышьяка соединении мышьяка
Laws with commentary

Codes and federal laws