Our pharmaceutical interpolymer range incorporates a polyethylene glycol and long-chain alkyl ester block copolymer structure into the Carbomer homopolymer or copolymer backbone — delivering rapid wetting alongside strong salt and ion resistance. This family covers several closely related grades, available in both powder and pre-dispersed liquid form.
Product · Carbomer Interpolymer · PharmaceuticalPharmaceutical Grade
Carbomer AM-U10/U20/U21 (Interpolymer, Pharmaceutical Grade)
Comparable viscosity profile to industry-standard grades such as Carbopol U10 / U20 / U21 / SF-1
Pharmaceutical-grade Carbomers are manufactured under distinct process controls specific to pharmaceutical formulation requirements. Additional pharmaceutical-grade options beyond those listed may be available — contact us with your target application.
Family: AM-U10/U20/U21Covers: Powder U10 / U20 / U21 · Liquid formViscosity: 8,500 – 77,000 mPa·sFamily Overview
Technical Specifications
| pH (10mg/mL aqueous solution) | 2.5 – 3.5 |
|---|---|
| Viscosity (0.5% aqueous dispersion) | 8,500 – 77,000 mPa·s |
| Ethyl acetate residue | ≤0.5% (ChP) / 0.35% (USP) |
| Cyclohexane residue | ≤0.3% (ChP) / 0.15% (USP) |
| Benzene | ≤2 ppm |
| Acrylic acid | ≤0.25% |
| Loss on drying | ≤2.0% |
| Residue on ignition | ≤2.0% |
| Carboxylic acid content | 52% – 62% |
pH (10mg/mL aqueous solution)
2.5 – 3.5
Viscosity (0.5% aqueous dispersion)
8,500 – 77,000 mPa·s
Ethyl acetate residue
≤0.5% (ChP) / 0.35% (USP)
Cyclohexane residue
≤0.3% (ChP) / 0.15% (USP)
Benzene
≤2 ppm
Acrylic acid
≤0.25%
Loss on drying
≤2.0%
Residue on ignition
≤2.0%
Carboxylic acid content
52% – 62%
Viscosity spans a broad range across the family (powder grades U10/U20/U21 and liquid form) — let us know your target viscosity and we'll confirm the specific grade that fits.
Key Applications
Rapid-Wetting, Salt- & Ion-Resistant Thickening
This interpolymer family is applied where rapid hydration during manufacturing matters, alongside salt- and ion-resistant thickening performance in higher-ionic-strength pharmaceutical formulations.
Frequently Asked Questions
What's the difference between the powder grades (U10/U20/U21) and the liquid form?
The powder grades require dispersion during manufacturing, while the liquid form is pre-dispersed, simplifying handling — particularly useful in processes where powder dispersion time is a bottleneck. Functionally, all grades in this family deliver rapid wetting with salt and ion resistance; the choice mainly comes down to your manufacturing process and target viscosity.
How does this compare to the standard Copolymer grade (AM-1382)?
Both offer salt and ion resistance. This interpolymer family adds rapid wetting on top of that resistance — hydrating noticeably faster during manufacturing — which matters when dispersion time is a bottleneck on your production line.
Which pharmacopoeia standards does this family comply with?
Manufactured with quality control benchmarked against industry-standard reference grades, meeting both ChP and USP residual solvent limits.
Do you provide certificates of analysis for each batch?
Yes, a batch-specific COA is provided with every shipment, along with ISO certification and MSDS/TDS on request. Regulatory documentation for pharmaceutical filings is available on request.
Back to Carbomer Overview
Other families:AM-971P (Type A · Pharma)AM-974P (Type B · Pharma)AM-1382 (Copolymer · Pharma)AM-980P (Type C · Pharma)AM-U10/U20/U21 (Pharma)