Strontium bis(2-mercaptopropionate)
Synonyms
Propanoic acid, 2-mercapto-, strontium salt (2:1);
Category
Anionic Surfactant
> Carboxylate
>> Chain Carboxylate
>>> Mercapto Alkyl Carboxylate
>>>> Mercapto Linear Alkyl Carboxylate
Chemical Numbering System
CAS: 35440-77-8
EINECS: 252-561-8
Molecular Formula & Molecular Weight
Molecular Formula: C6H10O4S2Sr; C3H6O2S.1/2Sr
Molecular Weight: 297.89
Structure
Properties
Appearance (1), solid.
Solubility soluble in water.
Stability stable. Easily oxidized.
Risk Solid form: flammable material; irritation, irritation to skin, eye, respiratory system. 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 anti-oxidizing, dispersing, depilatory 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 antioxidant.
Manufacturers
Update: 20140309(1); 20180917(2);