Agent Name

Disodium arsenate heptahydrate

CAS Number

10048-95-0

Formula

As-H-O4.2Na.7H2-O

Major Category

Metals

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.

Exposure Assessment
BEI

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

TLV (ACGIH)

0.01 mg/m3, as As

PEL (OSHA)

0.01 mg/m3, as As

IDLH (NIOSH)

5 mg/m3, as As

Explanatory Notes

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

Adverse Effects
Anemia

Anemia, Aplastic

Neurotoxin

Sensorimotor Neuropathy

Hepatotoxin

Hepatotoxin, Secondary

Reproductive Toxin

Yes

IARC Carcinogen

Known Carcinogen

NTP Carcinogen

Human Carcinogen

ACGIH Carcinogen

Confirmed Human

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Biomedical References

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: