Online Edition: "Specifications for Flavourings"

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Flavouring Butyric acid
Synonym(s) -
Latest JECFA evaluation 1997 (Session 49)
Status of specification Full
Chemical name Butanoic acid
JECFA number 87
CAS number 107-92-6  
FEMA number 2221
COE number 5
FLAVIS number -
Molecular weight 88.11 
Chemical formula C4H8O2  
Physical form/odour colourless liquid/strong, rancid, butterlike odour 
Solubility miscible with alcohol, most fixed oils, propylene glycol, water 
Solubility in ethanol -
Boiling point (°C) 164°
Assay min % 99.0%
Acid value max -
Refractive index 1.397-1.399
Specific gravity 0.952-0.956
Other requirements Heavy Metals: <0.004%; Lead: <10 mg/kg; Reducing Subs.: passes test
ID Test IR