Erythrosine

from Wikipedia, the free encyclopedia
Structural formula
Structure of erythrosine
General
Surname Erythrosine
other names
  • Erythrosine B
  • Disodium 2,4,5,7-tetraiodofluoresceinate
  • Disodium 2- (2,4,5,7-tetraiodo-6-oxido-3-oxo-xanthen-9-yl) benzoate
  • CI 45430
  • Acid Red 51
  • Pyrosine B
  • Tetraiodofluorescein
  • Eosin J.
  • Iodeosine
  • E  127
Molecular formula C 20 H 6 I 4 Na 2 O 5
Brief description

brown powder

External identifiers / databases
CAS number
  • 15905-32-5 (free acid)
  • 568-63-8 (sodium salt)
  • 16423-68-0 (sodium anhydrate)
EC number 240-046-0
ECHA InfoCard 100.036.390
PubChem 3259
ChemSpider 3144
Wikidata Q420101
properties
Molar mass 879.86 g mol −1
Physical state

firmly

solubility

soluble in water

safety instructions
GHS labeling of hazardous substances
07 - Warning

Caution

H and P phrases H: 302
P: 264-270-301 + 312-330-501
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Erythrosin is a pink- red food coloring (E 127), chemically the bis- sodium salt of 2,4,5,7-tetraiodine fluorescein . The compound can be classified both in the group of triphenylmethane dyes and of xanthene dyes .

Erythrosine contains a lot of iodine (57.7% iodine). The dye has recently fallen into the twilight due to possible allergy triggering and possible influencing of the thyroid functions (see also iodine intolerance ). The intervention in the thyroid function should z. B. can trigger uncontrolled impulsiveness in hyperactive children.

The use is currently only permitted to a limited extent: in cocktail cherries , emperor cherries , cosmetics (often in lipsticks ), in pet food, for coloring Easter eggs and as a drug additive, e.g. B. in alprazolam and certain methylphenidate preparations. Erythrosine is also occasionally used in dental plaque coloring tablets.

Web links

Individual evidence

  1. ↑ Entry on E 127: Erythrosine in the European database for food additives, accessed on June 16, 2020.
  2. ↑ a b c d data sheet Erythrosin B at AlfaAesar, accessed on June 2, 2018 ( PDF )(JavaScript required) .
  3. ↑ External identifiers or database links for erythrosine sodium : CAS number: 568-63-8, EC number: 629-600-6, ECHA InfoCard: 100.157.768 , PubChem : 27872 , ChemSpider : 25933 , Wikidata : Q72436325 .
  4. ↑ External identifiers or database links for erythrosine sodium anhydrate : CAS number: 16423-68-0, EC number: 240-474-8, ECHA InfoCard: 100.036.779 , GESTIS substance database : 129689 , PubChem : 27872 , ChemSpider : 25933 , Wikidata : Q27888290 .
  5. ↑ Roth, K. (2010): Chemical delicacies . 1st edition, Weinheim: Wiley-VCH. P. 144.