2-butanethiol

Structural formula
	Simplified structural formula without stereochemistry
General
Surname	2-butanethiol
other names	Butane-2-thiol; sec -butyl mercaptan; 2-butyl mercaptan; 1-methyl-1-propanethiol;
Molecular formula	C 4 H 1 0 S
Brief description	colorless, malodorous liquid
External identifiers / databases
ECHA InfoCard	100.007.424
PubChem	10560
ChemSpider	10120
Wikidata	Q27294175
properties
Molar mass	90.18 g mol −1
Physical state	liquid
density	0.83 g cm −3 (20 ° C)
Melting point	-165 ° C
boiling point	82–88 ° C (1013 hPa)
Vapor pressure	108 hPa (25 ° C)
solubility	sparingly soluble in water (1.32 g l −1 at 20 ° C); soluble in diethyl ether , ethanol and hydrogen sulfide ;
Refractive index	1.436 (20 ° C)
safety instructions
GHS labeling of hazardous substances danger
H and P phrases	H: 225
	P: 210-223
Toxicological data	5176 mg kg −1 ( LD 50 , rat , oral ) ; > 2000 mg kg −1 ( LD 50 , rabbit , transdermal ) ;
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

2-Butanethiol is a chemical compound from the group of thiols .

Extraction and presentation

2-Butanethiol can be obtained by reacting 2-butene with hydrogen sulfide in the presence of a catalyst (usually a halide) or from 2-iodobutane or 2-bromobutane using an alcoholic potassium hydrogen sulfide solution.

This reaction produces a 1: 1 mixture of ( R ) -2-butanethiol and ( S ) -2-butanethiol, that is, racemic 2-butanethiol [synonym: ( RS ) -2-butanethiol]. If “2-butanethiol” is mentioned in the scientific literature or in this article without further details, the racemate is meant.

properties

2-Butanethiol is a colorless, malodorous liquid that is sparingly soluble in water.

use

2-Butanethiol is used as an odor additive for natural gas or as an intermediate in the manufacture of other chemical compounds (such as cadusafos ).

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Data sheet 2-butanethiol (PDF) from Merck , accessed on January 27, 2019.
↑ ^a ^b ^c Entry on 2-butanethiol in the Hazardous Substances Data Bank , accessed January 27, 2019.
↑ Data sheet 2-butanethiol, 98% from Sigma-Aldrich , accessed on January 27, 2019 ( PDF ).

[Merck-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Data sheet 2-butanethiol (PDF) from Merck , accessed on January 27, 2019.

[HSDB-2] Entry on 2-butanethiol in the Hazardous Substances Data Bank , accessed January 27, 2019.

[Sigma-3] Data sheet 2-butanethiol, 98% from Sigma-Aldrich , accessed on January 27, 2019 ( PDF ).