4-Mercaptobutyric acid methyl ester
[CAS# 39257-91-5]

Identification

• Name: 4-Mercaptobutyric acid methyl ester
• Synonyms: Methyl 4-mercaptobutanoate; Methyl 4-mercaptobutyrate; Methyl gamma-mercaptobutyrate
• Molecular Formula: C₅H₁₀O₂S
• Molecular Weight: 134.20
• CAS Registry Number: 39257-91-5
• EC Number: 821-602-7

Properties

• Solubility: Slightly soluble (7.9 g/L) (25 °C), Calc.^*
• Density: 1.043±0.06 g/cm³ (20 °C 760 Torr), Calc.^*
• Boiling point: 59 °C (5 Torr)^**
• Refractive index: 1.4674 (589.3 nm 30 °C)^**
• Flash point: 71.1±10.5 °C, Calc.^*

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2019 ACD/Labs)

^** La Combe, Edward M.

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin irritation	Skin Irrit.	2	H315
Specific target organ toxicity - single exposure	STOT SE	3	H335
Eye irritation	Eye Irrit.	2A	H319
Acute toxicity	Acute Tox.	4	H302