White Arsenic, or Arsenous Acid, is a sublimation product obtained by roasting arsenical ores.

Properties:

Appearance................................................................................................

Solubility:

Color....................................................................

H2O.................................................................................

Odor ...........................................................

C2H5OH................................................................................

Do not taste...........................................................................................

C3H5(OH)3.................................................................................

HC1 .................................................................................

FeCl3, T. S...........................................................................................

AgN03 , T. S.........................................,........................................

KI, T. S......................................................................................................

Ac. Tannic ....................................................................................

MgS04, T. S...........................................................................................

What is the Marsh test for the identification of Arsenic?........................................................................

Incompatibilities: To Arsenous Acid, T. S., add

The principal utility of Arsenous Acid is for chorea. Dose, 0.0006 Gm. An unofficial salt, arsenobenzol or salvarsan, containing about 35% arsenic, is extensively used in the treatment of syphilis, relapsing fever, and frambesia or yaws. The dose is about 0.4 Gm., intramuscularly.

Official preparations made from White Arsenic:

Liquor Acidi Arsenosi. Dose, 0.2 mil.

Liquor Potassii Arsenitis (Fowler's Solution). Dose, 0.2 mil.

Other official preparations of Arsenic are: Sodii Arsenas; dose, 0.005 Gm. Sodii Arsenas Exsiccatus; dose, 0.003 Gm. Liquor Sodii Arsenatis; dose, 0.2 mil. Arseni Iodidum; dose, 0.005 Gm. This last salt combines the action of Arsenic and Iodine. The others have the characteristic action of Arsenic.