Methylseleninic acid
[CAS# 28274-57-9]

Identification

• Classification: Chemical reagent >> Organic reagent >> Selenium compound
• Name: Methylseleninic acid
• Synonyms: NSC 243621; NSC 244776
• Molecular Formula: CH₄O₂Se
• Molecular Weight: 127.00
• CAS Registry Number: 28274-57-9
• EC Number: 608-183-4

Properties

• Melting point: 131 °C^*
• Boiling point: -41.9±23.0 °C (760 Torr), Calc.^**
• Flash point: -71.5±22.6 °C, Calc.^**

^* Bird, Marjorie L.

^** Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2014 ACD/Labs)

Safety Data

• Hazard Symbols: T;N
• Risk Statements: R23/25;R33;R34;R50/53
• Safety Statements: S20/21;S26;S28;S36/37/39;S45;S60;S61

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin corrosion	Skin Corr.	1B	H314
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410
Specific target organ toxicity - repeated exposure	STOT RE	2	H373
Acute toxicity	Acute Tox.	3	H331
Acute toxicity	Acute Tox.	3	H301
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Serious eye damage	Eye Dam.	1	H318

• Transport Information: UN 2928 6.1/PG 2