Diarsenic trisulfide
[CAS# 1303-33-9]

Identification

• Classification: Dyes and pigments >> Pigment
• Name: Diarsenic trisulfide
• Synonyms: Arsenic yellow; Arsenic(III) sulfide; Arsenious sulfide; Arsenous sulfide; Auripigment; Auripigmentum; C.I. 77086; C.I. Pigment Yellow 39; Diarsenic trisulfide; Pigment Yellow 39; Sekio; Shio
• Molecular Formula: As₂S₃
• Molecular Weight: 246.04
• CAS Registry Number: 1303-33-9
• EC Number: 215-117-4

Properties

• Density: 3.46 g/cm^3*
• Melting point: 310 °C^*
• Boiling point: 707 °C^*
• Refractive index: 2.81^*

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

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410
Acute toxicity	Acute Tox.	3	H331
Acute toxicity	Acute Tox.	3	H301
Acute toxicity	Acute Tox.	3	H311