Disodium 4-(acetylamino)-5-hydroxynaphthalene-2,7-disulphonate
Synonyms
2,7-Naphthalenedisulfonic acid, 4-(acetylamino)-5-hydroxy-, sodium salt (1:2);
Disodium 4-(acetylamino)-5-hydroxynaphthalene-2,7-disulfonate;
Category
Anionic Surfactant
> Sulfonate
>> Amido Sulfonate
>>> Amido Naphthalenesulfonate
>>>> Linear Alkyl Fatty Amido Naphthalenesulfonate
Chemical Numbering System
CAS: 16698-16-1
EINECS: 240-746-6
Molecular Formula & Molecular Weight
Molecular Formula: C12H9NNa2O8S2; C12H11N1O8S2.2Na
Molecular Weight: 405.31
Structure
Properties
Appearance (1), solid.
Solubility soluble in water.
Stability stable. Under hot strong acid or hot strong alkali, easily hydrolyze.
Risk Solid form: flammable material; irritation, 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 emulsifying, dispersing, wetting, permeating abilities.
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
90.0 |
|
pH (25°C, 1%) |
7.0 - 8.5 |
Test Methods
(1), Actives
(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 emulsion stabilizer, dispersing agent.
Use as wetting agent.
Use as hydrotrope.
Manufacturers
Update: 20171018(1);