Sodium methylnaphthalenesulfonate
Time: 2013-05-31 02:03:26
Sodium methylnaphthalenesulfonate
Synonyms
Naphthalenesulfonic acid, methyl-, sodium salt (1:1);
Sodium methylnaphthalenesulphonate;
Category
Anionic Surfactant
>> Sulfonate
>> Aryl Sulfonate
>> Naphthyl Sulfonate
>> Linear Alkylnaphthyl Sulfonate
Chemical Numbering System
CASRN26264-58-4
EINECS247-564-6
Molecular Formula & Molecular Weight
Molecular Formula: C11H9NaO3S; C11H10O3S.Na
Molecular Weight: 244.24
Structure
Properties
Appearance    (1), solid; (2), liquid.
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.6) label:  
Liquid form: irritation, moderate irritation to skin, eye.
GHS (Rev.6) label:
Ecology    may be hazardous to environment. Water body should be given special attention.
Biodegradability    biodegradable.
Characteristics    excellent permeating, wetting, dispersing, emulsifying, hydrotropic abilities.
Synthesis
Methylnaphthalene and concentrated sulfuric acid react through sulfonation reaction, then sodium hydroxide or sodium carbonate neutralizes, finally obtain product.
Quality Standards & Test Methods
1. Physical and chemical indexes
Item
Physical and chemical indexes
Liquid
Solid
Actives, %, ≥
25.0 - 50.0
90.0
pH (25°C, 1%)
7.0 - 9.5
7.0 - 9.5
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
Liquid
Solid
Heavy metals (as Pb), mg/Kg, ≤
20
20
As, mg/Kg, ≤
3
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 penetrating agent, wetting agent.
Use as dispersing agent.
Use as hydrotrope.
2. Dyes
Use as dispersing agent.
3. Personal care products
Hydrotrope, gel forming agent in personal care products.
Manufacturers
 
Update: 20131025(1); 20170503(2);