Food safety and quality: details

Flavouring	Mixture of 3,5- and 3,6-Dimethyl-2-isobutylpyrazine
Synonym(s)	2-iso Butyl-3,(5 and 6)-dimethylpyrazine;3,5 and 3,6-Dimethyl-2-isobutyl pyrazine
Latest JECFA evaluation	2012 (Session 76)
Status of specification	Full
Information required
Chemical name	3,5-Dimethyl-2-(2-methylpropyl)pyrazine and 3,6-Dimethyl-3-(2-methylpropyl)pyrazine
JECFA number	2130
CAS number	38888-81-2;70303-42-3
FEMA number	4100
COE number
FLAVIS number
Molecular weight	164.25
Chemical formula	C10H16N2
Physical form/odour	Colourless transparent liquid; Roasted woody, meaty aroma with nutty cocoa notes
Solubility	Practically insoluble to insoluble in water
Solubility in ethanol	Soluble
Boiling point (°C)	73-75° (2 mm Hg)
Assay min %	95%
Acid value max
Refractive index	1.491-1.494
Specific gravity	0.924-0.929
Other requirements	3,5-isomer (48-50%); 3,6-isomer (48-50%)
ID Test	HNMR
Spectrum