4-(Acetylamino)-5-hydroxy-2,7-naphthalenedisulfonic acid
Synonyms
2,7-Naphthalenedisulfonic acid, 4-(acetylamino)-5-hydroxy-;
Category
Anionic Surfactant
> Sulfonate
>> Amido Sulfonate
>>> Amido Naphthalenesulfonate
>>>> Linear Alkyl Fatty Amido Naphthalenesulfonate
Chemical Numbering System
CAS: 134-34-9
EINECS: 205-139-2
Molecular Formula & Molecular Weight
Molecular Formula: C12H11NO8S2; C12H11N1O8S2
Molecular Weight: 361.35
Structure
Properties
Appearance (1), solid.
Solubility soluble in water.
Stability stable. Under hot strong acid or hot strong alkali, easily hydrolyze.
Risk Solid form: corrosion; 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 cleansing, 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%) |
< 3.0 |
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.
Use as intermediate in organic synthesis.
Use as cleansing agent.
Manufacturers
Update: 20171018(1);