Pigment red 7
Time: 2022-06-27 21:31:13; Reading: 0

Pigment red 7


CI 12420;

2-Naphthalenecarboxamide, N-(4-chloro-2-methylphenyl)-4-((4-chloro-2-methylphenyl)azo)-3-hydroxy-;


Non-ionic surfactant

> Azo

Chemical Numbering System

CASRN: 6471-51-8

EINECS: 229-315-3

Molecular Formula & Molecular Weight

Molecular Formula: C25H19Cl3N3O2

Molecular Weight: 464.34



Appearance    (1), solid.

Solubility    insoluble in water.

Stability    stable.

Risk    Solid form: irritation, irritation to skin, eye, respiratory system.

GHS (Rev.9) label: 

Ecology    may be hazardous to environment. Water body should be given special attention.

Biodegradability    biodegradable.

Characteristics    excellent dyeing, masking, dispersing, antistatic abilities. Azo dyes.



Quality Standards & Test Methods

1, Physical and chemical indexes


Physical and chemical indexes


Actives, %, ≥


Test Methods

(1), Actives

GB/T 13173 Surface active agents -- Detergents -- Testing methods

2, Hazardous substances indexes


Hazardous substances indexes


Heavy metals (as Pb), mg/kg, ≤


As, mg/kg, ≤


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, pigment.

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 allowable colorants.

Can be applied to cosmetics for only temporary contact with skin.

In raw materials, maximum concentration of 4-Chloro-o-toluidine is 5mg/kg.

(2), In accordance with EU regulations (EC) 2009/1223, directive 88/667/EEC, be included in Annex IV/12.

Can be applied to rinse-off products.