Calcium p-toluenesulphonate
Synonyms
Calcium di(toluene-4-sulphonate);
Benzenesulfonic acid, 4-methyl-, calcium salt (2:1);
Benzenesulfonic acid, p-methyl-, calcium salt;
Calcium p-toluenesulfonate;
Category
Anionic Surfactant
> Sulfonate
>> Aryl Sulfonate
>>> Phenyl Sulfonate
>>>> Linear Alkylphenyl Sulfonate
Chemical Numbering System
CAS: 36747-44-1
EINECS: 253-183-6
Molecular Formula & Molecular Weight
Molecular Formula: C14H14CaO6S2; C14H16O6S2.Ca
Molecular Weight: 382.47
Structure
Properties
Appearance (1), solid.
Solubility soluble in water.
Stability stable.
Risk Solid form: flammable material; irritation, moderate irritation to skin, eye. 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 dispersing, emulsifying, lubricating abilities.
Synthesis
Currently, sulfonation reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfonates.
Generally, p-toluene and sulfur trioxide react through reactor, then calcium oxide or calcium hydroxide neutralizes, finally obtain product.
US patent 8,921,588 (Process for preparing sulfates and/or sulfonates in a micro-reaction system) presents a synthetic process. Conditions: mole ratio of sulfur trioxide and alkyl benzenes or other raw materials: 1:1; temperature: 30-60°C; reactor: falling film reactor.
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
90.0 |
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.
Major Uses
1, Typical applications
Use as emulsifying agent, dispersing agent.
Use as lubricant.
Manufacturers
Update: 20170507(1);