Solvent Red 23
Synonyms
CI 26100;
1-(4-(Phenylazo)phenylazo)-2-naphthol;
Sudan III;
Sudan Red III;
Category
Non-ionic surfactant
> Azo
Chemical Numbering System
CASRN: 85-86-9
EINECS: 201-638-4
Molecular Formula & Molecular Weight
Molecular Formula: C22H16N4O
Molecular Weight: 352.39
Structure
Properties
Appearance (1), reddish brown solid.
Solubility insoluble in water.
Stability stable.
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 (Rev.10) label: 
Animal Toxicity
Table 1 Animal toxicity values
|
rabbit intraperitoneal LDLo |
250mg/kg[1] |
|
rabbit intrapleural LDLo |
500mg/kg[1] |
|
rabbit subcutaneous LDLo |
1000mg/kg[1] |
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent dyeing, masking, dispersing, antistatic abilities. Azo dyes.
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, 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
Colorant in personal care products.
Further information:
(1), In accordance with Safety and Technical Standards for Cosmetics (2015 Edition) of China, be included in the prohibited colorants.
(2), In accordance with EU regulations (EC) 2009/1223, directive 92/86/EEC, be included in Annex IV/51.
Not to be used in products applied on mucous membranes.
In raw materials: aniline <= 0.2%, 2-naphthol <= 0.2%, 4-aminoazobenzene < 0.1%, 1-(phenylazo)-2-naphthol <= 3%, 1-(2-(phenylazo)phenylazo)-2-naphthalenol <= 2%.
(3), In accordance with EU regulations (EC) 2013/344, be included in Annex II/1353.
Prohibited to use in hair dyeing products.
Manufacturers
References
[1]: ChemIDplus. 85-86-9, C.I. Solvent Red 23