Carbomer, CAS 9007-20-9, is a cross-linked polyacrylic acid polymer used as a low-dose rheology modifier and suspending agent in transparent gels, emulsions and creams. Grades differ in crosslinker, polymer architecture and rheology, so confirm the commercial grade or target performance, neutralization pH and electrolyte tolerance before ordering; COA, TDS and SDS are available on request.
Carbomer CAS 9007-20-9
- CAS: 9007-20-9
- Synonyms: Carbomer; Crosslinked Polyacrylic Acid; Acrylic Polymer Thickener; Carbopol-type Polymer
- Molecular Formula: Not specified
- Grade: Grade-specific crosslinked polyacrylic acid rheology modifier.
- Package: Moisture-resistant lined fiber drum or bag; confirm the offered grade and net weight.
Product Description
Carbomer
Synonyms: Carboxypolymethylene; Cross-linked polyacrylic acid
CAS number: 9007-20-9
Molecular formula: Not specified (cross-linked polymer)
Molecular weight: Not fixed for a polymer
Description: Carbomer is a cross-linked polyacrylic acid polymer, supplied as a white, fluffy, hygroscopic powder. Because its structure contains carboxyl groups, it has slight acidity and can be neutralized with alkaline agents to form transparent gels. After neutralization, the ionized carboxyl groups repel each other, the molecular chains expand and the system becomes highly viscous. Carbomer provides a thickening effect at very low dosage, gives liquid systems a defined yield value and rheology, and suspends insoluble additives such as particles and oil droplets at very low concentration. It is widely used to stabilize traditional oil-in-water emulsions and creams and to suspend water-insoluble substances. Gel viscosity increases with concentration and is sensitive to electrolytes: electrolyte ions, especially divalent ions, reduce viscosity by lowering the electrostatic repulsion along the polymer backbone.
FAQ - Technical & Supply Chain
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Q:
Does CAS 9007-20-9 identify one universal Carbomer grade?
A: No. CAS 9007-20-9 covers a family of crosslinked polyacrylic-acid polymers, not one material with a universal molecular weight, formula or viscosity. Grades differ in crosslinker, polymer architecture, residual-solvent controls and rheology. State the commercial grade or desired performance. -
Q:
What is Carbomer used for?
A: Carbomer is used as a low-dose rheology modifier and suspending agent for transparent gels, emulsions, creams and other formulations. It can suspend insoluble particles, oils and water-insoluble ingredients while building yield value and viscosity after neutralization. -
Q:
Which specifications should be compared when selecting Carbomer?
A: Compare viscosity only at the same polymer concentration, neutralization pH, spindle, speed and temperature. Also confirm carboxyl content, loss on drying, bulk density, residual monomers or solvents, clarity, dispersion time and regulatory grade where applicable. -
Q:
How should pH and electrolytes be considered before choosing a Carbomer grade?
A: Provide the finished formulation pH, salt type and concentration, surfactants, alcohol or polyol level and intended neutralizer. Conventional carbomers build viscosity after neutralization and may lose viscosity as electrolyte loading rises, while specialized grades can be more salt-tolerant. -
Q:
What packaging and storage should be confirmed for Carbomer?
A: Confirm the offered grade, net weight and moisture-resistant lined fibre drum or bag. Store in a dry area because carbomer is hygroscopic, and follow appropriate handling and dust-control precautions.
Ordering & Documentation
Key information for document requests, quotations, and supply planning.
Documents
COA, TDS, SDS/MSDS and packing details are available on request.
Quotation
Send the CAS number, grade, quantity, packing preference and destination.
Sample & Supply
Support is available for samples, trial orders, bulk and repeat supply.
Storage & Shipping
Product-specific conditions are confirmed before order.
