Food safety and quality
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Flavouring |
Propyleneglycol mono-2-methylbutyrate (mixture of isomers) |
Synonym(s) |
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Latest JECFA evaluation |
2010 (Session 73) |
Status of specification |
Full |
Information required |
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Chemical name |
Mixture of 2-hydroxypropyl 2-methylbutanoate and 1-hydroxypropan-2-yl 2-methylbutanoate |
JECFA number |
1981 |
CAS number |
923593-56-0;923593-57-1 |
FEMA number |
4467 |
COE number |
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FLAVIS number |
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Molecular weight |
160.21 |
Chemical formula |
C8H16O3 |
Physical form/odour |
Clear colourless liquid; Mild fruity ethereal aroma |
Solubility |
Practically insoluble or insoluble in water |
Solubility in ethanol |
Soluble |
Boiling point (°C) |
238-240° |
Assay min % |
96% |
Acid value max |
1 |
Refractive index |
1.422-1.432 |
Specific gravity |
0.968-0.978 (20°) |
Other requirements |
Mixture of isomers: 60% 2-Hydroxypropyl 2-methylbutanoate; 29% 1-Hydroxypropan-2-yl 2-methylbutanoate; SC: 7-8% Di-2-methylbutyrate propyleneglycol ester |
ID Test |
MS |
Spectrum |
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