Acid Red 51
Synonyms
Erythrosine;
CI 45430;
Erythrosine sodium;
Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 3',6'-dihydroxy-2',4',5',7'-tetraiodo-, sodium salt (1:2);
Category
Anionic Surfactant
> Phenolate
Chemical Numbering System
CAS: 16423-68-0
EINECS: 240-474-8
Molecular Formula & Molecular Weight
Molecular Formula: C20H6I4Na2O5; C20H8I4O5.2Na
Molecular Weight: 879.86
Structure
Properties
Appearance (1), powder.
Solubility soluble in water.
Stability stable.
Risk Solid form: irritation, irritation to skin, eye, respiratory system.
GHS label: 
Animal Toxicity
Table 1 Animal toxicity values
|
gerbil oral LD50 |
1930mg/kg[1] |
|
mouse intravenous LD50 |
370mg/kg[1] |
|
mouse oral LD50 |
1264mg/kg[1] |
|
rabbit intravenous LD50 |
200mg/kg[1] |
|
rat intraperitoneal LD50 |
300mg/kg[1] |
|
rat intravenous LD50 |
200mg/kg[1] |
|
rat oral LD50 |
1840mg/kg[1] |
Reproductive effect[1].
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent masking, dyeing abilities. Fluorescent dye.
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
95.0 |
Test Methods
(1), Actives
GB/T 13173 Surface active agents -- Detergents -- Testing methods
2, Hazardous substances indexes
|
Item |
Hazardous substances indexes |
|
Solid |
|
|
Heavy metals (as Pb), mg/kg, ≤ |
20 |
|
As, mg/kg, ≤ |
3 |
Test Methods
(1), Heavy metals (as Pb)
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30799 The test method of food detergents -- Determination of heavy metals
(2), As
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30797 The test method of food detergents -- Determination of total arsenic
3, Product standards
(1), Chinese standards
(1a), GB 17512.1 Food additive -- Erythrosine
4, Further explanation
(a), On physical and chemical indexes: firstly, shall be indicated carbon atom distribution; secondly, shall be indicated average molecular weight.
(b), Used in cosmetics, should be test for harmful substances or furtherly test for microorganisms, according to local regulations and standards.
Major Uses
1, Typical applications
Use as dye.
2, Personal care products
Dye in personal care products.
Do not use in hair dyeing products.
3, Food
Use as food additive (coloring agent).
Manufacturers
References
[1]: ChemIDplus. 16423-68-0, Erythrosine sodium
Update: 20190401(1);