Sodium n-Tridecyl Sulfate
Synonyms
1-Tridecanol,1-(hydrogen sulfate), sodium salt (1:1);
n-Tridecyl sulfate, sodium salt;
1-Tridecanol,hydrogensulfate,sodium salt;
Tridecyl Sodium Sulfate;
Sodium tridecyl Sulfate;
n-Tridecyl sulphate sodium salt;
Category
Anionic Surfactant
> Sulfate
>> Chain Alcohol Sulfate
>>> Alkanol Sulfate
>>>> Linear Alkanol Sulfate
Chemical Numbering System
CASRN: 3026-63-9
EINECS: 221-188-2
Molecular Formula & Molecular Weight
Molecular Formula: C13H27NaO4S; C13H28O4S.Na
Molecular Weight: 302.41
Structure
Properties
Appearance (1), solid; (2), liquid.
Odor faint characteristic odor.
Solubility soluble in water.
Physical - chemical properties
|
Flash point, °C |
> 93 |
Stability stable in alkali, weak acid and hard water; unstable in strong acid, hydrolyzed, reduced to alcohol.
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: 
Liquid form: irritation, moderate irritation to skin, eye.
GHS (Rev.10) label:
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent cleansing, emulsifying, foaming, wetting, permeating, dispersing, solubilizing abilities. Resistant to hard water. Cleaning ability is better than that of sodium dodecyl sulfate.
Note (1), Avoid using in children cleaning products, such as shower gels, shampoo, skin care products.
Synthesis
Currently, sulfated reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfates.
Generally, tridecyl alcohol and sulfur trioxide react through reactor, then sodium hydroxide 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 alcohols or other raw materials: 1:1; temperature: 30-60°C; reactor: falling film reactor.
US patent 6,455,488 (Process of making alkyl sulfate granulates) describes the preparation of a particulate alkyl sulfate, but does not involve the synthesis process.
US patent US 6,331,645 (Process for preparing powdery alkyl sulfates) describes the preparation of a powdery alkyl sulfate, but does not involve the synthesis process.
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Actives, %, ≥ |
85 - 90 (solid) / 25 – 35 (liquid) |
|
Soluble materials in petroleum ether, %, ≤ |
1.0 |
|
pH (25°C, 10% solution) |
7.5-10.5 |
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), Soluble materials in petroleum ether
GB/T 11989 Anionic surface active agents - Determination of soluble matter content in light petroleum
ISO 894 Surface active agents -- Technical sodium primary alkylsulphates -- Methods of analysis
(3), 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 |
|
|
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 foaming agent.
Use as emulsifying agent, dispersing agent.
2, Household detergents
Main ingredient or auxiliary ingredient for cleansing agent, foaming agent in laundry detergent and other household products.
3, Industrial cleaning agents
Main ingredient or auxiliary ingredient for cleansing agent, foaming agent in car cleaning products, metal cleaning products and other industrial cleaning products.
4, Personal care products
Use as emulsifier, cleansing agent, foaming agent.
5, Emulsion polymerization
Emulsifier, particle size controlling agent in emulsion polymerization.
6, Textile
Use as emulsifier, wetting agent, cleansing agent.
7, Pets
Main ingredient or auxiliary ingredient for cleansing agent, foaming agent in shampoos and other pet products.
8, Hydrocarbon transportation
Emulsifying agent in hydrocarbon transportation.
See also U.S. patent: United States Patent 4,162,989 Oil-in-water emulsion; United States Patent 4,152,290 Solution for transporting hydrocarbons in a pipeline; United States Patent 4,108,193 Pipeline method for transporting viscous hydrocarbons; United States Patent 3,943,954 Pipeline transportation of viscous hydrocarbons, etc.
Manufacturers
Update: 20131018(1); 20160816(2);