Selenium
[CAS 7782-49-2]

Identification

• Classification: Inorganic chemical industry >> Simple substance
• Name: Selenium
• Molecular Formula: Se
• Molecular Weight: 78.96
• CAS Registry Number: 7782-49-2
• EC Number: 231-957-4

Properties

• Density: 4.81
• Melting point: 217 °C
• Boiling point: 685 °C
• Water solubility: insoluble

Safety Data

• Hazard Symbols: GHS06;GHS08 Danger
• Risk Statements: H331-H301-H373-H413
• Safety Statements: S20/21;S28A;S45;S61

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute toxicity	Acute Tox.	3	H301
Acute toxicity	Acute Tox.	3	H331
Specific target organ toxicity - repeated exposure	STOT RE	2	H373
Chronic hazardous to the aquatic environment	Aquatic Chronic	4	H413
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Carcinogenicity	Carc.	1A	H350
Skin sensitization	Skin Sens.	1B	H317
Reproductive toxicity	Repr.	1A	H360
Reproductive toxicity	Lact.	-	H362
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Specific target organ toxicity - repeated exposure	STOT RE	1	H372
Specific target organ toxicity - single exposure	STOT SE	1	H370
Reproductive toxicity	Repr.	2	H361

• Transport Information: UN 3077