Terephthalylidene dicamphor sulfonic acid
Synonyms
Bicyclo(2.2.1)heptane-1-methanesulfonic acid, 3,3'-(1,4-phenylenedimethylidyne)bis(7,7-dimethyl-2-oxo-, (1S-(1alpha(1R*,4R*),4beta))-;
Ecamsule;
Category
Anionic Surfactant
> Sulfonate
>> Chain Sulfonate
>>> Bridge-ring Group Sulfonate
>>>> Camphor Group Sulfonate
Chemical Numbering System
CAS: 92761-26-7
EINECS: 410-960-6
Molecular Formula & Molecular Weight
Molecular Formula: C28H34O8S2
Molecular Weight: 562.69
Structure
Properties
Appearance (1), solid.
Solubility soluble in water.
Stability stable.
Risk Solid form: flammable material; irritation, moderate 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, dispersing, emulsifying, wetting abilities. UVA band.
Note (1), Carefully use in children products, such as sunscreen products, and so on.
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
90.0 |
Test Methods
(1), Actives
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 radiation protective agent.
Use as emulsifying agent, dispersing agent.
2, Personal care products
UV absorbing agent in personal care products.
* * * * * *
Further informations:
(1), In accordance with EU regulations (EC) No 1223/2009, directive 94/32/EC, terephthalylidene dicamphor sulfonic acid and its salts are included in Annex VI/7.
Maximum concentration is 10% (as acid).
(2), China “Safety and Technical Standards for Cosmetics (2015)”: allowable sunscreen, maximum concentration is 10% (as acid).
Manufacturers
Update: 20131027(1); 20170807(2);