1-Naphthol-4-sulfonic acid
Time: 2017-05-31 23:27:04

1-Naphthol-4-sulfonic acid

Synonyms

1-Naphthalenesulfonic acid, 4-hydroxy-;

Naphthol sulfonic acid;

Category

Anionic Surfactant

> Sulfonate

>> Aryl Sulfonate

>>> Naphthol Group Sulfonate

>>>> Naphthol Sulfonate

Chemical Numbering System

CASRN84-87-7

EINECS201-568-4

Molecular Formula & Molecular Weight

Molecular Formula: C10H8O4S

Molecular Weight: 224.23

Structure

Properties

Appearance    (1), solid.

Solubility    soluble in water.

Stability    stable.

Risk    Solid form: flammable material; irritation, moderate irritation to skin, eye, respiratory. Harmful products of combustion are CO, CO2 and so on. Contact with strong oxidants, can cause to burn.

GHS (Rev.7) label:  

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

Biodegradability    biodegradable.

Characteristics    excellent dispersing, emulsifying, cleansing, wetting, hydrotropic abilities.

Synthesis

Naphthol and chlorosulfonic acid or concentrated sulfuric acid or fuming sulfuric acid react through reactor, then obtain product.

Quality Standards & Test Methods

1, Physical and chemical indexes

Item

Physical and chemical indexes

Solid

Actives, %, ≥

90.0

pH (25°C, 1%)

< 5.0

Test Methods

(1), Actives

GB/T 5173 Surface active agents and detergents-Determination of anionic-active matter by direct two-phase titration procedure

ISO 2271 Surface active agents -- Detergents -- Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure

(2), pH

GB/T 6368 Surface active agents - Determination of pH of aqueous solution - Potentiometric method

ISO 4316 Surface active agents -- Determination of pH of aqueous solutions -- Potentiometric method

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.

Major Uses

1, Typical applications

Use as dispersing agent, emulsifying agent.

Use as cleansing agent.

2, Organic synthesis

Use as intermediates in organic synthesis.

Manufacturers