Curcumin extract
Curcumin is obtained by solvent extraction of turmeric i.e. the ground rhizomes of natural strains of Curcuma longa L. In order to obtain a concentrated curcumin powder, the extract is purified by crystallization . The product consists essentially of curcumins; i.e. the colouring principle ( l,7-bis(4-hydroxy-3-methoxyphenyl)hepta-l,6-dien-3,5-dione) and its two desmethoxy derivatives in varying proportions. Minor amounts of oils and resins naturally occuring in turmeric may be present.
Basic Info.:
Class: Dicinnamoylmethane
Color Index No.: 75300
Einecs: 207-280-5
Chemical names:
I l,7-Bis(4-hydroxy-3-methoxyphenyl)hepta-l,6-diene-3,5-dione
II l-(4-Hydroxyphenyl)-7-(4-hydroxy-3-methoxy-phenyl-)hepta-l,6-diene3,5-
dione
III l,7-Bis(4-hydroxyphenyl)hepta-l,6-diene-3,5-dione
Chemical formula
I C2iH2o06
II C2oH 18 05
III C19H16O4
Molecular weight: I. 368,39 II . 338,39 III. 308,39
Assay: Content not less than 95 % total colouring matters
Melting point: 179-182 °C
Physical & Chemical Control
| Item | Specification |
| Appearance | Orange-yellow crystalline powder |
| Odor & Taste | Characteristic |
| Particle size | 80Mesh |
| Sulphated Ash | ≤2% |
| Pesticides | Negative |
| Loss on drying | ≤5.0% |
Heavy Metals Control
| Item | Company Standard (EU Standard) |
| Arsenic | NMT 3 ppm |
| Lead | NMT 10 ppm |
| Mercury | NMT 1 ppm |
| Cadmium | NMT 1 ppm |
| Heavy Metals (as Pb ) | NMT 40 ppm |
Microbiological Control
| Item | Specification |
| Total Plate Count | ≤1000cfu/g |
| Yeast&Mold | ≤100cfu/g |
| Salmonella | Negative |
| E.Coli | Negative |
| Conclusion | Conform with specification. |
| Storage | Store in a cool and dry place, keep away from direct strong and heat. |
| Shelf life | 2 years if sealed and store away from direct sun light. |
Application: for food colorant
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