Sodium polyacrylate
Synonyms
2-Propenoic acid, homopolymer, sodium salt;
Polyacrylic acid, sodium salt;
Category
Polymer Surfactant
> Acrylic Polymers
>> Anionic Acrylic Polymers
Chemical Numbering System
CAS: 9003-04-7
EINECS: N/A
Molecular Formula & Molecular Weight
Molecular Formula: N/A
Molecular Weight: N/A
Structure
Properties
Appearance (1), white powder; or liquid.
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: 
Animal Toxicity
Table 1 Animal toxicity values
|
rat oral LD50 |
>40000mg/kg[1] |
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent film-forming, dispersing, emulsifying, adsorbing abilities.
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Liquid / Solid |
|
|
Actives, %, ≥ |
30.0 / 95.0 |
Test Methods
(1), Actives
GB/T 13173 Surface active agents -- Detergents -- Testing methods
2, Hazardous substances indexes
|
Item |
Hazardous substances indexes |
|
Liquid / 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 29948 Food safety national standard -- Food additive -- Sodium polyacrylate
(1b), HG/T 2838 Water treatment chemicals -- Sodium polyacrylate
(1c), QB/T 5481 Detergent builder -- Sodium polyacrylate
(1d), SH 2604.04 Water treatment chemicals -- Polyacrylic acid/sodium polyacrylate
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 dispersing agent, emulsifying agent.
Use as thickening agent.
Use as chelating agent.
Use as flocculant.
Use as suspending agent.
Use as water-absorbing agent.
Use as water-based lubricant.
2, Personal care products
Film-forming agent, viscosity controlling agent, emulsion stabilizer, binding agent, hair fixing agent, emollient, conditioning agent, absorbent in personal care products.
3, Water treatment
Antiscalant in water treatment.
4, Food
Use as food additive (thickening agent).
Manufacturers
References
[1]: ChemIDplus. 9003-04-7, Polyacrylic acid, sodium salt
Update: 20140908(1); 20201018(2);