Online Edition: "Specifications for Flavourings"


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Flavouring L-Histidine
Synonym(s) 2-Amino-3(4-imidasyl)propionic acid
L-alpha-Amino-4(or 5)-imidazolepropionic 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
Spectrum http://www.fao.org/ag/agn/jecfa-flav/img/img/1431.gif