Disodium arsenate heptahydrate

Synonyms

Disodium arsenate; Dibasic sodium arsenate (Na2HAsO4.7H2O); Dibasic sodium arsenate heptahydrate; Disodium acid arsenate heptahydrate (Na2HAsO4.7H2O); Disodium arsenate, heptahydrate; Disodium hydrogen arsenate (Na2HAsO4) heptahydrate; Disodium monohydrogen arsenate heptahydrate; Hydrogen disodium arsenate (HNa2AsO4) heptahydrate; Sodium acid arsenate, heptahydrate; Sodium arsenate, dibasic, heptahydrate; Sodium hydrogen arsenate (Na2HAsO4) heptahydrate; Sodium orthoarsenate heptahydrate; [ChemIDplus] UN1685

Category

Arsenic Compounds, Inorganic

Description

Odorless solid; Effloresces in warm air; [Merck Index] Colorless solid; [ICSC] White odorless solid; [CAMEO] White crystalline solid; [MSDSonline]

Sources/Uses

Used in dyeing and printing with Turkey-red oil, formerly as an anthelmintic and dermatologic, and as a veterinary drug (anti-parasitic, skin diseases, blood diseases, rheumatism, and asthma); [HSDB]

Comments

A skin, eye, and respiratory tract irritant; May cause arsenic poisoning; [ICSC] Dibasic sodium arsenate contains 40% arsenic in the anhydrous form and 24% arsenic in the more common hydrate form; [HSDB] Intraperitoneal TDLo (mouse) = 43 mg/kg; [Ullmann] See "Sodium arsenate, dibasic." See "Arsenic" and the linked occupational diseases.

Biomedical References

Inorganic arsenic plus methylated metabolites in urine = 35 ug As/L; end of workweek;

0.01 mg/m3, as As

0.01 mg/m3, as As

5 mg/m3, as As

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Sodium arsenate."

Aplastic anemia

Sensorimotor

Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion

Yes

Established

Human carcinogen

Confirmed Human

Diseases

Occupational diseases associated with exposure to this agent:

• Arsenic, chronic toxic effect

Processes

Industrial Processes with risk of exposure:

• Textiles (Printing, Dyeing, or Finishing)