Poly(oxy-1,2-ethanediyl), alpha-butyl-omega-carboxymethoxy-
Synonyms
Buteth carboxylic acid;
PEG butyl ether carboxylic acid;
Category
Anionic Surfactant
> Carboxylate
>> Polyether Carboxylate
>>> Alkyl Polyether Carboxylate
>>>> Linear Alkyl Polyoxyethylene Ether Carboxylate
Chemical Numbering System
CAS: 75427-76-8 / 107600-34-0
EINECS: N/A / N/A
Molecular Formula & Molecular Weight
Molecular Formula: (C2H4O)nC6H12O3
Molecular Weight: N/A
Structure
Properties
Appearance (1), slightly yellow to yellow liquid; or solid; or paste.
Solubility soluble in water.
Stability stable. Stable to acid, alkali, hard water.
Risk Liquid form: irritation, irritation to skin, eye.
GHS label: 
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent cleansing, emulsifying, dispersing, wetting, permeating, solubilizing, lubricating, hydrotropic abilities. Low foaming. Resistance to high concentrations of alkali. Resistance to oxidants. Resistance to high temperature. Good compatibility. Can be compounded with cationic surfactants without affecting each other. Mild surfactant. Can reduce irritation of other surfactants. Performance varies with EO number.
Note (1), 1,4-dioxane generated during polyether preparation: probable carcinogen. However, can be acceptable when concentration of 1,4-dioxane is less than 30ppm or less.
(2), Can be used in children products.
Synthesis
(1), Chloroacetic acid process (Discontinuous process)
PEG butyl ether react with chloroacetic acid, sodium hydroxide, and neutralized by hydrochloric acid, then obtained.
The residual amount of sodium chloroacetate should be controlled in this process.
(2), Direct oxidation process (Continuous process)
Under the action of catalyst, PEG butyl ether is directly oxidized, then obtained.
The advantage of this process is that the final product does not contain sodium chloroacetate and sodium chloride.
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
#1 |
|
|
Actives, %, ≥ |
85.0 |
|
Solid content, %, ≥ |
88.0 |
|
NaCl*, %, ≤ |
0.5 |
|
Sodium chloroacetate*, ppm, ≤ |
20 |
|
pH (25°C, 1% solution) |
2.0 - 3.0 |
|
*: Only applicable to products using chloroacetic acid process. |
|
Test Methods
(1), Actives
GB/T 13173 Surface active agents -- Detergents -- Testing methods
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), Solid content
QB/T 2950 Alkylpolyethoxy Carboxylate
(3), NaCl
QB/T 2950 Alkylpolyethoxy Carboxylate
(4), Sodium chloroacetate
QB/T 2950 Alkylpolyethoxy Carboxylate
(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 / liquid / paste |
|
|
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.
(b), Used in cosmetics, should be test for harmful substances or furtherly test for microorganisms, according to local regulations and standards.
Major Uses
1, Typical applications
Use as cleansing agent.
Use as emulsifying agent, dispersing agent.
Use as solubilizing agent.
Use as wetting agent, permeating agent.
2, Personal care products
Cleansing agent, emulsifying agent in personal care products.
3, Household detergents
Cleansing agent in household cleaning products.
4, Machinery
Emulsifying agent, cleansing agent in water-based metalworking fluids.
5, Industrial cleaning
Cleansing agent in industrial cleaning.
Product members
Buteth-3 carboxylic acid;
Manufacturers
Update: 20131111(1); 20181126(2);