Ammonium p-dodecylbenzene sulfonate
Time: 2014-12-23 15:25:51
Ammonium p-dodecylbenzene sulfonate
Synonyms
4-Dodecylbenzenesulfonic acid, ammonium salt;
Benzenesulfonic acid, 4-dodecyl-, ammonium salt (1:1);
Ammonium 4-dodecylbenzene sulfonate;
Category
Anionic Surfactant
>> Sulfonate
>> Aryl Sulfonate
>> Phenyl Sulfonate
>> Linear Alkylphenyl Sulfonate
Chemical Numbering System
CASRN14356-33-3
EINECSN/A
Molecular Formula & Molecular Weight
Molecular Formula: C18H33NO3S;C18H30O3S.H3N
Molecular Weight: 343.52
Structure
Properties
Appearance    (1), solid; (2), liquid.
Solubility    soluble in water.
Stability    unstable in alkali, release ammonia.
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: irritation, moderate irritation to skin, eye.
GHS (Rev.6) label:
Ecology    may be hazardous to environment. Water body should be given special attention.
Biodegradability    biodegradable.
Characteristics    excellent cleansing, foaming, emulsifying, wetting, dispersing, solubilizing abilities. Weak resistance to hard water, used in conjunction with chelating agent. Good compatibility. Under sodium chloride, non-foaming or low foaming.
Synthesis
Currently, sulfonation reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfonates.
Generally, 4-dodecylbenzene and sulfur trioxide react through reactor, then ammonia water 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, %, ≥
30.0 - 50.0
pH (25°C, 1%)
4.0 - 7.0
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), 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 cleansing agent.
Use as emulsifying agent, dispersing agent.
Use as foaming agent.
2. Household detergents
Use as cleansing agent, foaming agent.
3. Industrial cleaning agents
Use as cleansing agent.
4. Emulsion polymerization
Emulsifier, particle size controlling agent in emulsion polymerization.
5. Pets
Use as cleansing agent, foaming agent.
Manufacturers
 
Update: 20170522(1);