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Online Edition: "Specifications for Flavourings"

Flavouring 2-Hydroxyethanethiol
Synonym(s) 2-Hydroxyethyl mercaptan;beta-Mercaptoethanol;1-Hydroxy-2-mercaptoethane;1-Mercapto-2-hydroxyethane;Ethanol, 2-mercapto-
Latest JECFA evaluation 2010 (Session 73)
Status of specification Full
Chemical name 2-mercaptoethanol
JECFA number 1925
CAS number 60-24-2
FEMA number 4582
COE number
FLAVIS number
Molecular weight 78.13
Chemical formula C2H6OS
Physical form/odour Clear colourless liquid; Very unpleasant odour
Solubility Practically insoluble or insoluble in water
Solubility in ethanol Soluble
Boiling point (°C) 156-158°
Assay min % 97%
Acid value max
Refractive index 1.499-1.505
Specific gravity 1.114-1.120 (20°)
Other requirements
ID Test MS