Benzophenone-9
Synonyms
2,2'-Dihydroxy-4,4'-dimethoxy-5,5'-disulfobenzophenone, disodium salt;
Benzenesulfonic acid, 3,3'-carbonylbis(4-hydroxy-6-methoxy-, disodium salt;
Disodium 3,3'-carbonylbis(4-hydroxy-6-methoxybenzenesulphonate);
Category
Anionic Surfactant
> Sulfonate
>> Aryl Sulfonate
>>> Benzophenone Group Sulfonate
>>>> Hydroxybenzophenone Group Sulfonate
Chemical Numbering System
CAS: 76656-36-5
EINECS: 278-520-4
Molecular Formula & Molecular Weight
Molecular Formula: C15H12Na2O11S2; C15H14O11S2.Na2
Molecular Weight: 478.36
Structure
Properties
Appearance (1), powder.
Solubility soluble in water.
Stability stable.
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 UV absorbing, anti-photoaging, dispersing abilities.
Note (1), Avoid using in children products, such as makeup.
Synthesis
2,2'-Dihydroxy-4,4'-dimethoxybenzophenone and chlorosulfonic acid react, 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, %, ≥ |
95.0 |
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, 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 UV absorbing agent.
Use as photosensitizer.
2, Personal care products
Use as UV absorbing agent.
3, Coatings, paint
Use as UV absorbing agent.
Can improve anti-photoaging effect of film.
4, Polymers, resins, plastics, leather, fiber
Use as UV absorbing agent.
Manufacturers
Update: 20131025(1); 20170418(2);