Arsenic acid
[CAS# 7778-39-4]

Identification

• Name: Arsenic acid
• Synonyms: Arsenic acid; Orthoarsenic acid
• Molecular Formula: H₃AsO₄
• Molecular Weight: 141.94
• CAS Registry Number: 7778-39-4
• EC Number: 231-901-9

Properties

• Solubility: Freely soluble (271 g/L) (25 °C), Calc.^*
• Density: 2.2 g/cm^3**
• Melting point: >250 °C^***

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2017 ACD/Labs)

^** "Hazardous Substances Data Bank" data were obtained from the National Library of Medicine (US)

^*** Roche, Andre

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute toxicity	Acute Tox.	3	H331
Acute toxicity	Acute Tox.	3	H301
Carcinogenicity	Carc.	1A	H350
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Acute toxicity	Acute Tox.	4	H312
Skin corrosion	Skin Corr.	1C	H314
Reproductive toxicity	Repr.	2	H361
Serious eye damage	Eye Dam.	1	H318