Disodium oxybis(dodecylbenzenesulfonate)
Synonyms
Benzenesulfonic acid, oxybis(dodecyl-, disodium salt;
Disodium 2,2'-oxybis(4-dodecylbenzenesulfonate);
Category
Anionic Surfactant
> Sulfonate
>> Aryl Sulfonate
>>> Phenyl Ether Sulfonate
>>>> Linear Alkyl Phenyl Ether Sulfonate
Chemical Numbering System
CAS: 25167-32-2
EINECS: 246-688-8
Molecular Formula & Molecular Weight
Molecular Formula: C36H56Na2O7S2; C36H58O7S2.Na2
Molecular Weight: 710.94
Structure
Schematic formula:
Properties
Appearance (1), solid; (2), liquid.
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: 
Liquid form: irritation, moderate irritation to skin, eye.
GHS label:
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent emulsifying, dispersing, cleansing, wetting, foaming abilities.
Synthesis
Currently, sulfonation reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfonates.
Generally, oxybis(dodecylbenzene) and fuming sulfuric acid or sulfur trioxide react through reactor, then sodium hydroxide or sodium carbonate neutralizes, finally obtain product.
Refer to: US patent 8,921,588 Process for preparing sulfates and/or sulfonates in a micro-reaction system.
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
90.0 |
|
pH (25°C, 1%) |
7.0 - 10.5 |
Test Methods
(1), Actives
(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.
Major Uses
1, Typical applications
Use as emulsifying agent, dispersing agent.
Use as wetting agent.
Use as cleansing agent.
2, Emulsion polymerization
Emulsifying agent, particle size controlling agent, dispersing agent in emulsion polymerization.
3, Textile, printing and dyeing
Leveling agent in textile, printing and dyeing.
4, Industrial cleaning agents
Use as emulsifying agent, cleansing agent.
Manufacturers
Update: 20170530(1);