Welan Gum
Synonyms
Gum welan;
Category
Polymer Surfactant
> Polysaccharide and its Derivatives
>> Anionic-type
>>> Anionic Polysaccharide and its Derivatives
Chemical Numbering System
CAS: 96949-22-3
EINECS: N/A
Molecular Formula & Molecular Weight
Molecular Formula: N/A
Molecular Weight: N/A
Structure
Properties
Appearance (1), off-white to pale yellow powder.
Solubility soluble in water.
Stability stable.
Risk Solid form: flammable material; irritation, irritation to skin, eye, respiratory system. 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 film-forming, emulsifying, dispersing, lubricating, sustained-release abilities. Microbial gum. Resistant to temperature. Salt tolerance. Non-gelling polysaccharide.
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
80.0 |
Test Methods
(1), Actives
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.
(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 film-forming agent.
Use as thickening agent.
Use as slow-release agent.
Use as dispersing agent, emulsifying agent.
Use as suspending agent.
Use as flocculant.
2, Personal care products
Binding agent, film-forming agent, emulsion stabilizer, viscosity controlling agent in personal care products.
3, Textile
Sizing agent in textile, silk.
4, Paper-making
Sizing agent in paper-making.
5, Building materials
Thickening agent in cement, plaster, paints.
6, Petroleum
Suspending agent, dispersing agent in oil field.
7, Powder molding
Adhesive in powder molding, ceramics.
Manufacturers
Update: 20140911(1); 20200426(2);