Allyl mercaptan

Synonym(s):2-Propene-1-thiol;Allyl mercaptan

CAS NO.：870-23-5
Empirical Formula: C3H6S
Molecular Weight: 74.14
MDL number: MFCD00004894
EINECS: 212-792-7
SAFETY DATA SHEET (SDS)
Update Date: 2025-09-25 17:15:13

What is Allyl mercaptan?

Chemical properties

colourless to faintly yellow-brown liquid

Chemical properties

A colorless liquid with strong garlic odor. Used as a flavor enhancer, flavoring agent or adjuvant

Occurrence

Reported found in onion, garlic and caucas (Allium victoralis L.).

The Uses of Allyl mercaptan

Allyl Mercaptan is a synthetic flavoring agent that is a stable, color- less liquid of garlic-like odor. it should be stored in glass or tin con- tainers. it is used in artificial garlic flavors for application in condiments at 3 ppm, and in baked goods at 2 ppm. it is also termed 2 propylene-1 thiol.

The Uses of Allyl mercaptan

Allyl mercaptan is an important raw material and intermediate used in organic synthesis, pharmaceuticals agrochemicals and dyestuff fields.

Definition

ChEBI: 2-Propene-1-thiol is an alkanethiol.

Preparation

Produced from Ally] bromide and Potassium hydrosulfide.

Aroma threshold values

Detection: 0.005 ppb

Safety Profile

Poison by inhalation and ingestion. Strong irritant to skin and mucous membranes. When heated to decomposition it emits highly toxic fumes of SO,. Very dangerous fire hazard. To fight fire, use water mist or spray, alcohol foam, Con, or dry chemical. See also ALLYL COMPOUNDS and MERCAPTANS

Properties of Allyl mercaptan

Melting point:	175-176 °C(Solv: benzene (71-43-2))
Boiling point:	67-68 °C (lit.)
Density	0.898 g/mL at 25 °C (lit.)
refractive index	n20/D 1.4765(lit.)
FEMA	2035 \| ALLYL MERCAPTAN
Flash point:	18 °C
storage temp.	-20°C
solubility	Not miscible or difficult to mix.
pka	9.83±0.10(Predicted)
form	Liquid
color	Clear colorless to light yellow
Odor	at 0.10 % in propylene glycol. alliaceous sulfurous garlic onion roasted
Sensitive	Air Sensitive
JECFA Number	521
BRN	1697523
Stability:	Stable, but highly flammable. Incompatible with strong bases, strong oxidizing agents, reactive metals.
CAS DataBase Reference	870-23-5(CAS DataBase Reference)
NIST Chemistry Reference	Allyl mercaptan(870-23-5)
EPA Substance Registry System	2-Propene-1-thiol (870-23-5)

Safety information for Allyl mercaptan

Signal word	Danger
Pictogram(s)	Flame Flammables GHS02 Exclamation Mark Irritant GHS07
GHS Hazard Statements	H225:Flammable liquids H319:Serious eye damage/eye irritation
Precautionary Statement Codes	P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233:Keep container tightly closed. P240:Ground/bond container and receiving equipment. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.