Butanethiol
[CAS# 109-79-5]

Identification

• Classification: Flavors and spices >> Synthetic spice >> Thiol perfume
• Name: Butanethiol
• Synonyms: 1-Mercaptobutane; Butyl mercaptan; n-Butyl thioalcohol; Butane-1-thiol
• Molecular Formula: C₄H₁₀S
• Molecular Weight: 90.18
• CAS Registry Number: 109-79-5
• EC Number: 203-705-3
• FEMA: 3478

Properties

• Density: 0.84
• Melting point: -116 ºC
• Boiling point: 98 ºC
• Refractive index: 1.442-1.444
• Flash point: 12 ºC
• Water solubility: 0.60 g/100 mL. Slightly soluble

Safety Data

• Hazard Symbols: F;Xn
• Risk Codes: R11;R21/22
• Safety Description: S16;S33;S36/37;S9

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Flammable liquids	Flam. Liq.	2	H225
Acute toxicity	Acute Tox.	4	H302
Acute toxicity	Acute Tox.	4	H332
Eye irritation	Eye Irrit.	2	H319
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Skin sensitization	Skin Sens.	1B	H317
Skin irritation	Skin Irrit.	2	H315
Specific target organ toxicity - single exposure	STOT SE	3	H335
Skin sensitization	Skin Sens.	1	H317
Acute toxicity	Acute Tox.	2	H310
Acute toxicity	Acute Tox.	2	H300
Acute toxicity	Acute Tox.	2	H330
Specific target organ toxicity - single exposure	STOT SE	2	H371
Reproductive toxicity	Repr.	2	H361

• Transport Information: UN 2347