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Online Edition: "Specifications for Flavourings"

Flavouring L-Histidine
Synonym(s) L-alpha-Amino-4(or 5)-imidazolepropionic acid;2-Amino-3(4-imidasyl)propionic acid
Latest JECFA evaluation 2004 (Session 63)
Status of specification Full
Chemical name L-Histidine
JECFA number 1431
CAS number 71-00-1
FEMA number 3694
COE number
FLAVIS number 17.008
Molecular weight 155.16
Chemical formula C6H9O2N3
Physical form/odour White crystals or crystalline powder; odourless
Solubility Soluble in water; Insoluble in ether
Solubility in ethanol Slightly soluble
Boiling point (°C)
Assay min % 98%
Acid value max
Refractive index
Specific gravity
Other requirements mp: 282°; Sp.rotation = +37.5 to +39.5° (25°)
ID Test MS