Gellan gum
Synonyms
Gum, gellan;
Category
Polymer Surfactant
> Polysaccharide and its Derivatives
>> Anionic-type
>>> Anionic Polysaccharide and its Derivatives
Chemical Numbering System
CAS: 71010-52-1
EINECS: 275-117-5
Molecular Formula & Molecular Weight
Molecular Formula: N/A
Molecular Weight: N/A
Structure
Low acyl gellan gum:
High acyl gellan gum:
Properties
Appearance (1), off-white powder.
Solubility soluble in hot water. Dispersible 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 metabolism glue. Agar substitute. Can form transparent gel. Cations, especially divalent cations, can promote to form gel.
Note (1), High acyl gellan gum (natural gellan gum), low acyl gellan gum (deacylated gellan gum). Characteristics as follows:
|
Items |
High acyl gellan gum |
Low acyl gellan gum |
|
Apparent strength |
soft |
hard |
|
Elasticity |
strong |
none |
|
Pressure stability |
non-friable |
friable |
|
Gelling temperature |
high |
low |
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
85.0 |
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, Product standards
(1), Chinese standards
(1a), GB 25535 Food additive -- Gellan gum
4, 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 gel-forming agent.
Use as suspending agent.
Use as water-based lubricant.
2, Personal care products
Film-forming agent, viscosity controlling agent in personal care products.
3, Food
Use as food additive (thickening agent).
Manufacturers
Update: 20140911(1); 20200426(2);