Benzophenone-5
Synonyms
2-Hydroxy-4-methoxybenzophenone-5-sodium sulfonate;
Benzenesulfonic acid, 5-benzoyl-4-hydroxy-2-methoxy-, monosodium salt;
Sulibenzone;
Category
Anionic Surfactant
> Sulfonate
>> Aryl Sulfonate
>>> Benzophenone Group Sulfonate
>>>> Hydroxybenzophenone Group Sulfonate
Chemical Numbering System
CAS: 6628-37-1
EINECS: N/A
Molecular Formula & Molecular Weight
Molecular Formula: C14H11NaO6S; C14H12O6S.Na
Molecular Weight: 330.29
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-Hydroxy-4-methoxybenzophenone and chlorosulfonic acid react, then sodium hydroxide or sodium carbonate neutralizes, finally obtain product.
Refer to:
US patent 5,849,955 Process for the synthesis of 2-hydroxy-4-alkyloxy benzophenone, etc.
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, UV filter.
* * * * * *
Further information:
(1), In accordance with EU regulations (EC) No 1223/2009, directive 2000/6/EC, benzophenone-4 is included in Annex VI/22.
Maximum concentration is 5% (as acid).
(2), In China, in accordance with Safety and Technical Standards for Cosmetics (2015 edition), maximum concentration is 5% (as acid).
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);