Online Edition: "Specifications for Flavourings"

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Flavouring Methylsulfinylmethane
Synonym(s) Dimethyl sulfoxide (DMSO)
Methyl sulfoxide
Latest JECFA evaluation 2000 (Session 55)
Status of specification Full
Chemical name Methylsulfinylmethane
JECFA number 507
CAS number 67-68-5  
FEMA number 3875
COE number -
FLAVIS number -
Molecular weight 78.13 
Chemical formula C2H6OS  
Physical form/odour colourless liquid with mild cabbage or garlic odour 
Solubility soluble in oil and alcohol; miscible with water 
Solubility in ethanol -
Boiling point (°C) 189°
Assay min % 99%
Acid value max -
Refractive index 1.414-1.420
Specific gravity 1.087-1.092
Other requirements -
ID Test IR, MS