Ammonium coco-sulfate
Time: 2012-09-27 17:21:07
Ammonium coco-sulfate
Synonyms
Coconut oil, sulfate, ammonium salt;
Sulfuric acid, monococoyl ester, ammonium salt;
Category
Anionic Surfactant
>> Sulfate
>> Chain Alcohol Sulfate
>> Natural Substance Derivatives Sulfate
>> Vegetable Oil and Fat Derivatives Sulfate
Chemical Numbering System
CAS RN: 90989-98-3
EINECS: 292-758-6
Molecular Formula & Molecular Weight
Molecular Formula: N/A;
Molecular Weight: N/A.
Structure
R: coco-alkyl.
Properties
Appearance    (1), white to pale yellow gelatinous colloid; (2), white to pale yellow liquid; (3), solid.
Solubility    soluble in water.
Stability    stable in weak acid and hard water; unstable in strong acid, hydrolyzed, reduced to alcohol. At strong alkali, release ammonia.
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.6) label:  
Liquid (or paste) 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 foaming, cleansing, emulsifying, wetting, permeating, dispersing, solubilizing abilities. Resistant to hard water. Particularly suitable for preparation of a low pH value (neutral to weakly acidic) products. Can be used instead of ammonium dodecyl sulfate.
Ammonium coco-sulfate and ammonium coceth sulfate complexes can produce excellent synergies, such as: rich foam, very mild, excellent thickening properties.
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, coconut 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.
Quality Standards & Test Methods
1. Physical and chemical indexes
Item
Physical and chemical indexes
68 type
28 type
25 type
Actives, %, ≥
66.0 - 70.0
27.0 - 29.0
24.0 - 26.0
Unsulfated materials, %, ≤
4.0
1.5
1.5
(NH4)2SO4, %, ≤
2.0
1.0
1.0
NH4Cl, %, ≤
0.5
0.3
0.3
pH (25°C, 10% solution)
5.5 - 7.0
5.5 - 7.0
5.5 - 7.0
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), Unsulfated materials
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), (NH4)2SO4
GB/T 6366 Surface active agents - Determination of mineral sulfate content - Titrimetric method
ISO 6844 Surface active agents -- Determination of mineral sulfate content -- Titrimetric method
ISO 894 Surface active agents -- Technical sodium primary alkylsulphates -- Methods of analysis
(4), NH4Cl
GB/T 15963 Sodium lauryl sulfate, ammonium chloride calculated.
ISO 894 Surface active agents -- Technical sodium primary alkylsulphates -- Methods of analysis
(5), 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
Paste
Liquid
Heavy metals (as Pb), mg/Kg, ≤
20
20
20
As, mg/Kg, ≤
3
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 foaming agent.
Use as cleansing agent.
2. Personal care products
Cleansing agent, emulsifying agent, foaming agent in personal care products.
For example, main ingredient or auxiliary ingredient for cleansing agent, foaming agent, emulsifying agent in toothpaste, shampoo, hand sanitizer and other products.
3. Household detergents
Use as cleansing agent, foaming agent.
Particularly, suitable for the preparation of high bubble and light-duty detergents.
4. Industrial cleaning agents
Use as cleansing agent, foaming agent.
5. Emulsion polymerization
Emulsifier, particle size controlling agent in emulsion polymerization.
6. Pets
Main ingredient or auxiliary ingredient for cleansing agent, foaming agent in shampoos and other pet products.
Manufacturers
 
Update: 20131018(1); 20161012(2);