2-Amino-1-naphthalenesulfonic acid
Synonyms
Tobias acid;
1-Naphthalenesulfonic acid, 2-amino-;
Category
Zwitterionic Surfactant
> Sulfonate Type
>> Aromatic Amine Sulfonate
Chemical Numbering System
CAS: 81-16-3
EINECS: 201-331-5
Molecular Formula & Molecular Weight
Molecular Formula: C10H9NO3S; C10H9N1O3S
Molecular Weight: 223.25
Structure
Properties
Appearance (1), solid.
Solubility soluble in water.
Physical - chemical properties
|
Water solubility, g/L |
4.1 (20°C)[1] |
Stability stable.
Risk Solid form: flammable material; irritation, irritation to skin, eye, respiratory system. Harmful products of combustion are CO, CO2, nitrogen oxides and so on. Contact with strong oxidants, can cause to burn.
GHS label: 
Animal Toxicity
Table 1 Animal toxicity values
|
rat oral LD50 |
19400mg/kg[2] |
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent dispersing, antistatic abilities.
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
95.0 |
Test Methods
(1), Actives
GB/T 13173 Surface active agents -- Detergents -- Testing methods
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 antistatic agent.
Use as intermediate in organic synthesis. For example, used in synthesis of dyes.
Manufacturers
References
[1]: HSDB. 81-16-3, 2-Amino-1-naphthalenesulfonic acid
[2]: ChemIDplus. 81-16-3, 2-Amino-1-naphthalenesulfonic acid
Update: 20190714(1);