Monododecyl sulfate, isopropylamine salt (1:1)
Time: 2013-10-20 11:59:55
Monododecyl sulfate, isopropylamine salt (1:1)
Synonyms
Sulfuric acid, monododecyl ester, compd. with 2-propanamine (1:1);
Isopropylamine lauryl sulfate;
Category
Anionic Surfactant
>> Sulfate
>> Chain Alcohol Sulfate
>> Alkanol Sulfate
>> Linear Alkanol Sulfate
Chemical Numbering System
CASRN: 3032-58-4
EINECS: 221-215-8
Molecular Formula & Molecular Weight
Molecular Formula: C15H35NO4S; C12H26O4S.C3H9N (SciFinder Hill Rules)
Molecular Weight: 325.51
Structure
Properties
Appearance    (1), liquid.
Solubility    soluble in water.
Stability    stable in alkali, weak acid and hard water; unstable in strong acid, hydrolyzed, reduced to alcohol.
Risk    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. Resistant to hard water.
Note    (1), Do not use in children products, such as: shampoos, skin care products.
(2), Avoid using in personal care products.
(3), Do not use in nitrosating environment. Reaction of isopropylamine and nitrous acid can not produce nitrosamines, however, reaction of contained secondary amine of isopropylamine and nitrous acid can produce nitrosamines. Nitrosamine is a carcinogen.
Synthesis
Currently, sulfated reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfates.
Generally, lauryl alcohol and sulfur trioxide react through reactor, then isopropylamine 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.
Quality Standards & Test Methods
1. Physical and chemical indexes
Item
Physical and chemical indexes
Liquid
Actives, %, ≥
30.0
pH (25°C, 10% solution)
6.0 - 9.5
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), 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
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 foaming agent.
2. Household detergents
Use as cleansing agent, foaming agent.
3. Industrial cleaning agents
Use as cleansing agent, foaming agent.
Manufacturers
 
Update: 20161114(1);