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Online Edition: "Specifications for Flavourings"

Flavouring 2-Methyl-1-propanethiol
Synonym(s) Isobutyl mercaptan
Latest JECFA evaluation 2000 (Session 55)
Status of specification Full
Chemical name 2-Methyl-1-propanethiol
JECFA number 512
CAS number 513-44-0
FEMA number 3874
COE number
FLAVIS number
Molecular weight 90.19
Chemical formula C4H10S
Physical form/odour colourless liquid with cooked vegetable, mustard-like odour
Solubility soluble in oil and alcohol
Solubility in ethanol
Boiling point (°C) 87-89°
Assay min % 97%
Acid value max
Refractive index 1.437-1.444
Specific gravity 0.829-0.836
Other requirements
ID Test IR