Carthamin

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Structural formula
Structure of Carthamin
General
Surname Carthamin
other names
  • CI Natural Red 26
  • Carthamic acid
  • Safflower red
Molecular formula C 43 H 42 O 22
Brief description

red solid

External identifiers / databases
CAS number 36338-96-2
EC number 252-981-1
ECHA InfoCard 100.048.150
PubChem 11968069
ChemSpider 21106423
Wikidata Q419193
properties
Molar mass 910.78 g mol −1
Physical state

firmly

Melting point

228-230 ° C

solubility

Slightly soluble in water, soluble in ethanol and dilute alkali metal carbonate solution

safety instructions
GHS hazard labeling
no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Carthamin is the yellowish-red natural dye from the petals of safflower , which also Saf (f) lor is called.

Extraction

Safflower ( Carthamus tinctorius ), inflorescence

Since the dye is water-soluble, it can be removed by washing it out of the safflower petals, then dried and obtained as safflower red in an alkaline solution .

properties

The dye is only moderately soluble in water and not particularly lightfast .

use

Wool , cotton and silk can be dyed pink, cherry-red, brown-red or brown-yellow, depending on the amount of dye used. Carthamin is also used as the Natural Red 26 food coloring .

Individual evidence

  1. ↑ a b c d Entry on Carthamin. In: Römpp Online . Georg Thieme Verlag, accessed on November 12, 2014.
  2. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
  3. ↑ Carthamin . In: Merck's Warenlexikon . 3rd ed. 1884 ff., P. 73 f.
  4. ↑ Handbook of Chemistry, Volume 7 . 1866, p. 1193 ( limited preview in Google Book Search).

Web links