Sodium Cocomonoglyceride Sulfate
Time: 2012-09-26 15:59:31
Sodium Cocomonoglyceride Sulfate
Synonyms
Glycerides, coconut oil mono-, sulfated, sodium salts;
Sodium coconut monoglyceride sulfate;
Glycerides, coco mono-, sulfated, sodium salts;
Category
Anionic Surfactant
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Chemical Numbering System
CASRN: 61789-04-6
EINECS: 263-026-3
Molecular Formula & Molecular Weight
Molecular Formula: N/A
Molecular Weight: N/A
Structure
R: coco-alkyl.
Properties
Appearance    (1), white powder.
Odor    faint characteristic odor.
Solubility    soluble in water.
Stability    stable in weak alkali, weak acid and hard water; unstable in strong acid, strong alkali.
Risk    Solid form: flammable material; irritation, low 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, emulsifying, foaming, wetting, permeating, dispersing, solubilizing abilities. Resistant to hard water. Commonly used in children washing products.
Note    (1), can using in children cleaning products, such as shower gels, shampoo, skin care products.
Synthesis
Possible synthetic method A:
(1), Monoglyceride is obtained by esterification of glycerin and coconut acid;
(2), Cocomonoglyceride sulfate is obtained by esterification of monoglyceride and sulfur trioxide;
(3), Sodium cocomonoglyceride sulfate is obtained by neutrallzation of cocomonoglyceride sulfate and sodium hydroxide solution.
(4), Obtain a solid product by spray - drying method.
In the method, monoglyceride purity must reach more than 90 - 96%.
Review and related methods of synthesis, see also reference [1].
Quality Standards & Test Methods
1. Physical and chemical indexes
Item
Physical and chemical indexes
Solid
Actives, %, ≥
85 - 95
pH (25°C, 1% solution)
6.0 - 7.5
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
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 foaming agent.
2. Household detergents
Main ingredient or auxiliary ingredient for cleansing 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 cleansing agent, foaming agent.
5. Pets
Main ingredient or auxiliary ingredient for cleansing agent, foaming agent in shampoos and other pet products.
Manufacturers
 
References
[1]: F.U.Ahmed著王林梅译. 由脂肪酸和脂肪酸甲酯合成甘油脂肪酸单酯硫酸盐. 日用化学工业译丛, 1991年02期
Update: 20131018(1); 20160829(2);