Sodium C13-18 sec-alkyl sulphonate
Synonyms
Sodium C13-18 sec-alkyl sulfonate;
Sulfonic acids, C13-18-sec-alkane, sodium salts;
SAS;
Category
Anionic Surfactant
> Sulfonate
>> Chain Sulfonate
>>> Alkyl Sulfonate
>>>> Linear Alkyl Sulfonate
Chemical Numbering System
CASRN：75534-59-7
EINECS：N/A
Molecular Formula & Molecular Weight
Molecular Formula: C13H27NaO3S - C18H37NaO3S; C13H28O3S.Na - C18H38O3S.Na
Molecular Weight: 286.41 - 356.54
Structure
R1+R2=C12-17.
Properties
Appearance (1), pale yellow liquid; (2), yellow paste; (3), yellow granule.
Solubility soluble in water.
Hygroscopicity hygroscopic.
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.10) label: 
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent permeating, wetting, dispersing, cleansing, emulsifying, solubilizing, foaming abilities. Resistant to oxidation. Tolerance to high temperature.
Synthesis
Sulfoxidation method is the typical method for preparing linear alkyl sulfonate.
C13-18 alkane reacts with sulfur dioxide and oxygen, then refine and obtain finished product.
For further information, see:
United States Patent 4,643,813 Process for producing alkanesulfonic acids,
United States Patent 4,680,147 Process for the isolation under mild conditions of paraffinsulfonate and sulfuric acid from reaction mixtures from paraffin sulfoxidation,
United States Patent 4,798,915 Process for the extraction of paraffins from mixtures thereof with alkane-sulfonic acids,
United States Patent 4,808,343 Process for isolating paraffinsulfonates with a low alkali metal sulfate content and sulfuric acid from paraffin-sulfoxidation reaction mixtures without obligatory production of sodium sulfate,
United States Patent 4,827,078 Process for extracting paraffins from their mixtures with alkanesulfonic acids,
United States Patent 4,843,184 Process for extracting paraffins from their mixtures with paraffinsulfonic acids,
United States Patent 8,426,642 Method for isolating concentrated paraffin sulfonic acids,
United States Patent 4,454,075 Process for removing sulfuric acid from the reaction mixture obtained in the sulfoxidation of paraffins,
United States Patent 4,310,473 Process for separating sulfuric acid from sulfoxidation output,
United States Patent 3,960,938 Extraction of sulfuric acid from sulfuric acid-sulfonic acid mixtures, and so on.
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
|
Liquid or Paste |
Solid |
|
|
Actives, %, ≥ |
30.0 - 70.0 |
90.0 |
|
pH (25°C, 1% solution) |
7.5 - 10.0 |
7.5 - 10.0 |
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 |
|
|
Solid |
Liquid or Paste |
|
|
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 permeating agent, wetting agent.
Use as emulsifying agent, dispersing agent.
2, Household detergents
Use as cleansing agent, wetting agent, foaming agent. Such as washing powder, laundry detergent and other products.
3, Food industry
Use as cleansing agent, wetting agent, foaming agent. Such as dishwasher cleaning agent, tableware cleaning agent and other products.
4, Industrial cleaning agents
Cleansing agent, permeating agent, wetting agent in metal cleaning products and other industrial cleaning products.
5, Textile, printing and dyeing
Use as permeating agent, cleansing agent, emulsifying agent, dispersing agent.
6, Pets
Main ingredient or auxiliary ingredient for cleansing agent, foaming agent in shampoos and other pet products.
Manufacturers
Update: 20170716(1);