Calcium dodecylbenzene sulfonate
Time: 2012-09-28 16:25:43
Calcium dodecylbenzene sulfonate
Synonyms
Benzenesulfonic acid, dodecyl-, calcium salt (2:1);
Dodecylbenzenesulfonic acid, calcium salt;
Calcium lauryl benzene sulfonate;
Category
Anionic Surfactant
>> Sulfonate
>> Aryl Sulfonate
>> Phenyl Sulfonate
>> Linear Alkylphenyl Sulfonate
Chemical Numbering System
CASRN26264-06-2
EINECS247-557-8
Molecular Formula & Molecular Weight
Molecular Formula: C36H58CaO6S2; C36H60O6S2.Ca
Molecular Weight: 691.05
Structure
Properties
Appearance    (1), transparent or slightly hazy amber liquid; (2), solid.
Solubility    slightly soluble in water; soluble in kerosene, xylene; dispersible or soluble in methanol.
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 (Rev.6) label:  
Liquid 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 (Rev.6) label:  
Animal Toxicity
Table 1 Animal toxicity values
rat oral LD50
4000mg/kg[1]
mouse oral LD50
3680mg/kg[1]
Ecology    may be hazardous to environment. Water body should be given special attention.
Biodegradability    biodegradable.
Characteristics    excellent emulsifying, dispersing, lubricating, adsorbing abilities.
Note    (1), Avoid using in children cleaning products, such as shower gels, shampoo.
Synthesis
Currently, sulfonation reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfonates.
Generally, dodecylbenzene and sulfur trioxide react through reactor, then calcium oxide 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
Liquid
Actives, %, ≥
60.0 - 70.0
pH (25°C, 5%, 50% isopropanol solution)
5.0 - 7.5
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), pH
GB/T 6368 Surface active agents - Determination of pH of aqueous solution - Potentiometric method
ISO 4316 Surface active agents -- Determination of pH of aqueous solutions -- Potentiometric method
2. Hazardous substances indexes
Item
Hazardous substances indexes
Liquid
Solid
Heavy metals (as Pb), mg/Kg, ≤
20
20
As, mg/Kg, ≤
3
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 emulsifying agent, dispersing agent.
2. Pesticide
Use as emulsifying agent.
3. Personal care products
Use as cleansing agent, emulsifying agent.
Manufacturers
 
References
[1]: ChemIDplus. 26264-06-2, Calcium dodecylbenzenesulfonate
Update: 20131025(1); 20170310(2);