C.I. Food Yellow 3
Synonyms
Sunset yellow;
CI 15985;
2-Naphthalenesulfonic acid, 6-hydroxy-5-((4-sulfophenyl)azo)-, disodium salt;
Category
Zwitterionic Surfactant
> Sulfonate Type
>> Azo Dye
Chemical Numbering System
CAS: 2783-94-0
EINECS: 220-491-7
Molecular Formula & Molecular Weight
Molecular Formula: C16H10N2Na2O7S2; C16H12N2O7S2.2Na
Molecular Weight: 452.37
Structure
Properties
Appearance (1), solid.
Solubility soluble in water.
Stability stable.
Physical - chemical properties
|
Water solubility, g/L |
190 (25°C)[1] |
Risk Solid form: flammable material; irritation, irritation to skin, eye, respiratory system. Harmful products of combustion are CO, CO2 and so on. Contact with strong oxidants, can cause to burn.
GHS label: 
Animal Toxicity
Table 1 Animal toxicity values
|
mouse intraperitoneal LD50 |
4600mg/kg[2] |
|
mouse oral LD50 |
> 6000mg/kg[2] |
|
rat intraperitoneal LD50 |
3800mg/kg[2] |
|
rat oral LD50 |
> 10000mg/kg[2] |
Overall carcinogenic evaluation: Group 3[2].
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent masking, dispersing abilities.
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
85.0 |
Test Methods
(1), Actives
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 6227.1 Food safety national standard - Food additive - Sunset yellow
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.
Major Uses
1, Typical Applications
Use as dye.
2, Personal care products
Dye in personal care products.
* * * * * *
Further information:
(1), In accordance with EU regulations (EC) No 1223/2009, directive 88/667/EEC, be included in Annex IV/31.
Can be used in personal care products.
(2), In accordance with Safety and Technical Standards for Cosmetics (2015 Edition):
Can be used in personal care products.
In raw materials, other material limitations are as follows:
The total contents of 4-aminobenzene-1-sulfonic acid, 3-hydroxynaphthalene- 2,7-disulfonic acid, 6-hydroxynaphthalene-2-sulfonic acid, 7-hydroxynaphthalene-1,3-disulfonic acid and 4,4’-diazoaminodi(benezene sulfonic acid) are not more than 0.5%.
The content of 6,6’-oxydi(2-naphthalene sulfonic acid) disodium salt is not more than 1.0%.
The content of unsulfonated aromatic primary amine is not more than 0.01% (as aniline).
3, Food
Use as colorant.
Manufacturers
References
[1]: HSDB. 2783-94-0, C.I. Food Yellow 3
[2]: ChemIDplus. 2783-94-0, C.I. Food Yellow 3
Update: 20171208(1);