Carthamin

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Carthamin[1]
IUPAC name (2Z,6S)-6-β-D-Glucopyranosyl -2-[ [(3S) -3-β-D-glucopyranosyl-2,3,4-trihydroxy -5-[(2E)-3-(4-hydroxyphenyl) -1-oxo-2-propenyl] -6-oxo-1,4-cyclohexadien-1-yl]methylene] -5,6-dihydroxy -4-[(2E)-3-(4-hydroxyphenyl) -1-oxo-2-propenyl] -4-cyclohexene-1,3-dione
Other names Carthamin
Carthamic acid
C.I. Natural Red 26
Safflower red
Identifiers
CAS number [36338-96-2]
SMILES O=C(/C=C/C3=C C=C(O)C=C3) C (C(/C1=C/C2=C(O) [C@]([C@@]6([H])[C@H](O) [C@@H](O)[C@H](O)[C@@H](CO)O6)(O) C (O)= C (C(/C=C/C5=CC=C(O)C=C5) =O)C2=O)=O)= C(O)[C@]([C@]4([H]) O [C@H](CO)[C@@H](O)[C@H] (O)[C@H]4O)(O)C1=O
Properties
Molecular formula C43H42O22
Molar mass 910.78
Appearance Red powder
Solubility in water Slightly soluble
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Carthamin is a natural red pigment derived from safflower (Carthamus tinctorius). It is used as a dye and a food coloring. As a food additive it is known as Natural Red 26.

It was used extensively in the past for dyeing wool for the carpet industry in European countries.[2]

[edit] References

  1. ^ Merck Index, 11th Edition, 1876.
  2. ^ Carthamus tinctorius (Safflower), a commercially viable dye for textiles. Vankar, Padma S.; Tiwari, Vandana; Shanker, Rakhi; Shivani. Asian Dyer (2004), 1(4), 25-27.