Sodium 4-hydroxynaphthalene-1-sulphonate
Synonyms
1-Naphthalenesulfonic acid, 4-hydroxy-, monosodium salt;
Sodium naphthol sulfonate;
Category
Anionic Surfactant
> Sulfonate
>> Aryl Sulfonate
>>> Naphthol Group Sulfonate
>>>> Naphthol Sulfonate
Chemical Numbering System
CAS: 6099-57-6
EINECS: 228-050-0
Molecular Formula & Molecular Weight
Molecular Formula: C10H7NaO4S; C10H8O4S.Na
Molecular Weight: 246.21
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 label: 
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent dispersing, emulsifying, wetting, hydrotropic abilities.
Synthesis
Naphthol and chlorosulfonic acid or concentrated sulfuric acid or fuming sulfuric acid react through reactor, then sodium hydroxide or sodium carbonate neutralizes, finally obtain product.
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
90.0 |
|
pH (25°C, 1%) |
4.0 - 10.0 |
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.
(b), Used in cosmetics, should be test for harmful substances; or furtherly test for microorganisms.
Major Uses
1, Typical applications
Use as dispersing agent, emulsifying agent.
2, Personal care products
Absorbent in personal care products.
3, Organic synthesis
Use as intermediates in organic synthesis.
Manufacturers
Update: 20170530(1);