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Online Edition: "Specifications for Flavourings"
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Analytical Methods (Volume 4)
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Flavouring
2-Oxopentanedioic acid
Synonym(s)
Pentanedioic acid, 2-oxo-;2-Oxopentanedioic acid;2-Oxoglutaric acid;2-Ketoglutaric acid;alpha-Ketoglutaric acid
Latest JECFA evaluation
1999 (Session 53)
Status of specification
Full
Information required
Chemical name
2-Oxopentanedioic acid
JECFA number
634
CAS number
328-50-7
FEMA number
3891
COE number
FLAVIS number
Molecular weight
146.1
Chemical formula
C5H6O5
Physical form/odour
white to pale yellow crystalline powder
Solubility
soluble in water at >1000 g/l at 20�C and petrolatum at <100 g/kg at 20�C
Solubility in ethanol
Boiling point (°C)
323°
Assay min %
99%
Acid value max
Refractive index
Specific gravity
Other requirements
Melting Pt.: 115.3°
ID Test
IR, MS, CNMR
Spectrum