Benzenesulfonic acid, mono- and di-C15-30-alkyl derivs., sodium salts
Time: 2013-10-31 16:11:51
Benzenesulfonic acid, mono- and di-C15-30-alkyl derivs., sodium salts
Synonyms
Sodium C15-30 alkylbenzenesulfonate;
Benzenesulfonic acid, C15-30 alkyl-, sodium salt;
Sodium C15-30 alkylbenzene sulfonate;
Sodium C15-30 alkylbenzenesulphonate;
Benzenesulfonic acid, C15-30-alkyl derivatives, sodium salts;
Category
Anionic Surfactant
>> Sulfonate
>> Aryl Sulfonate
>> Phenyl Sulfonate
>> Linear Alkylphenyl Sulfonate
Chemical Numbering System
CASRN78330-12-8
EINECSN/A
Molecular Formula & Molecular Weight
Molecular Formula: C21H35NaO3S - C66H125NaO3S; C21H36O3S.Na - C66H126O3S.Na
Molecular Weight: 390.56 - 1021.75
Structure
R: C15-30.
Properties
Appearance    (1), solid.
Solubility    slightly 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 (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.
Synthesis
Currently, sulfonation reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfonates.
Generally, C15-30 alkylbenzene and sulfur trioxide react through reactor, then sodium hydroxide or sodium carbonate 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 cleansing agent.
Use as emulsifying agent, dispersing agent.
2. Household detergents
Use as cleansing agent, emulsifying agent.
3. Industrial cleaning agents
Use as cleansing agent, emulsifying agent.
4. Emulsion polymerization
Emulsifier, particle size controlling agent in emulsion polymerization.
Manufacturers
 
Update: 20170521(1);