Methylmercuric chloride
[CAS# 115-09-3]

Identification

• Name: Methylmercuric chloride
• Synonyms: Methylmercury monochloride; Monomethyl mercury chloride; NSC 19998
• Molecular Formula: CH₃ClHg
• Molecular Weight: 251.08
• CAS Registry Number: 115-09-3
• EC Number: 204-064-2

Properties

• Melting point: 175 °C^*

^* Wilde, W. K.

Safety Data

• Hazard Symbols: GHS06;GHS08;GHS09 Danger
• Risk Statements: H351-H360Df-H362-H330-H310-H300-H372
• Safety Statements: S13;S28;S36;S45;S60;S61

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410
Acute toxicity	Acute Tox.	2	H300
Specific target organ toxicity - repeated exposure	STOT RE	2	H373
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Acute toxicity	Acute Tox.	2	H330
Acute toxicity	Acute Tox.	1	H310
Acute toxicity	Acute Tox.	1	H330
Carcinogenicity	Carc.	2	H351
Reproductive toxicity	Lact.	-	H362
Acute toxicity	Acute Tox.	2	H310
Reproductive toxicity	Repr.	1A	H360
Specific target organ toxicity - repeated exposure	STOT RE	1	H372
Reproductive toxicity	Repr.	1A	H360Df

• Transport Information: UN 2025 6.1 / PGII