POTASSIUM ARSENATE

Synonym(s):Arsenic acid potassium salt;Potassium dihydrogen arsenate

CAS NO.：7784-41-0
Empirical Formula: AsH2KO4
Molecular Weight: 180.03
MDL number: MFCD00036296
EINECS: 232-065-8
SAFETY DATA SHEET (SDS)
Update Date: 2023-04-23 13:52:06

What is POTASSIUM ARSENATE?

Chemical properties

Colorless crystals. Soluble in water; insoluble in alcohol.

Chemical properties

Potassium arsenate is a colorless to white crystalline solid.

The Uses of POTASSIUM ARSENATE

In the textile, tanning, and paper industries. In insecticidal formulations (especially fly paper).

Preparation

Monopotassium arsenate(V) is prepared by calcining a mixture of equal parts of arsenic oxide and potassium nitrate in cast-iron cylinders, leach ing the melt with water, and concentrating the solution with arsenic acid. It forms white crystal crusts.

Hazard

Toxic by ingestion and inhalation, strong irritant.

Safety Profile

Confirmed human carcinogen. Mutation data reported. When heated to decomposition it emits toxic fumes of arsenic. See also ARSENIC COMPOUNDS.

Potential Exposure

Potassium arsenate is used in the textile, tanning, preserving hides; in the textile printing and paper industries; and as an insecticide in fly baits, especially for fly paper; as laboratory reagent.

Shipping

UN1677 Potassium arsenate, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.

Incompatibilities

A weak base. Reacts with strong oxidizers, bromine azide, acids and decomposes on contact with strong acids producing acetic acid fumes. Arsine, a very deadly gas, can be released in the presence of acid, acid mists, or hydrogen gas.

Properties of POTASSIUM ARSENATE

Melting point:	277-283 °C(lit.)
Density	2.867
solubility	: clear to very slightly hazy, colorless to faintly yellow
form	powder
Specific Gravity	2.8
color	white to off-white
Water Solubility	g/100g solution H2O: 15.7 (0°C), 23.6 (25°C), 48.0 (100°C); solid phase, KH2AsO4 ·H2O (0°C, 25°C), KH2AsO4 (100°C) [KRU93]; slowly soluble in 1.6 parts glycerol; insoluble alcohol [MER06]
Merck	13,7689
EPA Substance Registry System	Potassium arsenate (7784-41-0)

Safety information for POTASSIUM ARSENATE

Signal word	Danger
Pictogram(s)	Skull and Crossbones Acute Toxicity GHS06 Health Hazard GHS08 Environment GHS09
GHS Hazard Statements	H301:Acute toxicity,oral H331:Acute toxicity,inhalation H350:Carcinogenicity H410:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes	P201:Obtain special instructions before use. P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P273:Avoid release to the environment. P311:Call a POISON CENTER or doctor/physician. P301+P310:IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P501:Dispose of contents/container to..…