Sulfuric acid, mono-C9-11-alkyl esters
Synonyms
Mono-C9-11-alkyl sulfates;
Category
Anionic Surfactant
> Sulfate
>> Chain Alcohol Sulfate
>>> Alkanol Sulfate
>>>> Linear Alkanol Sulfate
Chemical Numbering System
CAS: 90583-08-7
EINECS: 292-205-9
Molecular Formula & Molecular Weight
Molecular Formula: C9H20O4S - C11H24O4S
Molecular Weight: 224.32 - 252.37
Structure
R: C9-11.
Properties
Appearance (1), liquid.
Solubility slightly soluble in water.
Stability stable in alkali, weak acid and hard water; unstable in strong acid, hydrolyzed, reduced to alcohol.
Risk Liquid form: corrosion; flammable material; irritation, moderate irritation to skin, eye. Harmful products of combustion are CO, CO2 and so on. Contact with strong oxidants, can cause to burn.
GHS label: 
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent cleansing, emulsifying, wetting, permeating, dispersing, solubilizing, foaming abilities. Resistant to hard water.
Synthesis
Currently, sulfated reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfates.
Generally, C9-11 alkyl alcohol and sulfur trioxide react through reactor, then 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.
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Liquid |
|
|
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 |
|
Liquid |
|
|
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.
Use as wetting agent, permeating agent.
Used in preparation of the corresponding salt surfactant, such as: sodium C9-11 alkyl sulfate.
2, Industrial cleaning agents
Use as cleansing agent, wetting agent.
Manufacturers
Update: 20161102(1);