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Online Edition: "Specifications for Flavourings"

Flavouring Ethyl maltol
Synonym(s) INS No. 637;2-Ethyl-3-hydroxy-4H-pyran-4-one;2-Ethylpyromeconic acid
Latest JECFA evaluation 2007 (Session 68)
Status of specification Full
Chemical name 2-Ethyl-3-hydroxy-4-pyrone
JECFA number 1481
CAS number 1110651
FEMA number 3487
COE number
FLAVIS number 07.047
Molecular weight 140.14
Chemical formula C7H8O3
Physical form/odour White crystalline powder; Sweet fruit-like aroma
Solubility Sparingly soluble in water, soluble in propylene glycol
Solubility in ethanol Soluble
Boiling point (°C)
Assay min % 99% (anhydrous basis)
Acid value max
Refractive index
Specific gravity
Other requirements m.p. = 89-93°