INCI: Carbomer - Also known as: Carbopol, Polyacrylic Acid, Carboxyvinyl Polymer

QUICK FACTS

What is carbomer?

Carbomer is a high-molecular-weight synthetic polymer - specifically a cross-linked polyacrylic acid - that functions as a pH-responsive thickener and rheology modifier in aqueous formulations. It was first developed by B.F. Goodrich in the 1950s and has since become one of the most precisely characterized thickeners in cosmetic science. Its distinguishing feature is its pH-responsive swelling mechanism: in acidic form, carbomer remains compact; when neutralized to a slightly acidic or neutral pH with a base (typically sodium hydroxide or an amine), it swells dramatically, creating a high-viscosity gel network at concentrations as low as 0.1-0.5%.

This pH-responsive character makes carbomer a precision formulation tool. Unlike polysaccharide thickeners that can vary in performance with raw material batch variation, carbomer's synthetic origin ensures highly consistent batch-to-batch performance - a meaningful advantage in formulas where texture consistency directly affects the application behavior of active-rich creams.

At Sweet Chemistry, carbomer is used specifically in the two cream formulas - the Hydra-Cream and Lipid-Cream - where its thickening contribution forms part of a multi-polymer rheology system that also includes polyvinyl alcohol and xanthan gum. Its absence from the Hydra-Serum (which uses a different emulsion architecture) and the Oil-Serum (which is waterless) reflects a deliberate formulation decision about where each thickener's properties are best suited.

What does it do for skin?

Carbomer's role is purely formulation-structural rather than actively skin-beneficial. It creates the viscosity and texture consistency that allow Sweet Chemistry's cream formulas to carry their high active payload evenly, spread smoothly on application, and remain stable throughout the product's shelf life and use cycle.

In a cream carrying 3% Matrikynes® peptides, 2% THD ascorbate, three ceramide types, and a panel of botanical oils, maintaining the even distribution of all actives within a stable, homogeneous emulsion requires a well-designed rheology system. Carbomer's gel network provides part of this structure - locking the emulsion in a stable configuration that does not phase-separate or settle over time and ensuring that every application delivers actives at their labeled concentrations.

The feel of a cream on skin is also a direct product of its rheology system. Carbomer's contribution to the cushioned satin finish of the Hydra-Cream and the emollient radiant finish of the Lipid-Cream is real, if invisible: it is the structure that allows these formulas to spread thinly and absorb with the skin-like feel that characterizes both products, rather than sitting as a heavy layer on the surface.

FOUND IN

In 2 Formulas

Carbomer is specific to Sweet Chemistry's two cream formulas, where its pH-responsive thickening contributes to the distinctive texture consistency and emulsion stability of each product.

Hydration - Dry to Normal

Elasticity Reinforcing Hydra-Cream Carbomer - 1.7 oz / 50 ml

Carbomer contributes to the cushioned satin finish of the Hydra-Cream's 40%-active emulsion - working alongside polyvinyl alcohol and xanthan gum in the rheology system that enables even active distribution and consistent skin feel.

Hydration - Dry to Dehydrated

Elasticity Reinforcing Lipid-Cream Carbomer - 1.7 oz / 50 ml

In the Lipid-Cream, carbomer contributes to the structural stability of a 46%-active emulsion - the highest active concentration in the water-based range - supporting even application and consistent active delivery throughout the product's full use cycle.

WORKS TOGETHER WITH

Natural Polymer Xanthan Gum

INCI: Xanthan Gum.

A fermentation-derived polysaccharide rheology modifier present in all three water-based formulas. Synergy Note: Carbomer provides pH-responsive synthetic thickening while xanthan gum contributes natural biopolymer pseudoplastic character - their combined presence in the cream formulas creates a hybrid rheology system that balances precise performance with natural-origin texture contribution.

Synthetic Film-Former Polyvinyl Alcohol

INCI: Polyvinyl Alcohol.

A synthetic film-forming polymer present alongside carbomer in all three water-based formulas. Synergy Note: Carbomer and PVA address different aspects of the emulsion architecture - carbomer provides thickening and structural stability while PVA contributes film-forming and surface-smoothing character. Their combined presence creates a more comprehensive texture system than either provides alone.

ECM Peptide Complex Matrikynes® Bone Peptides

INCI: Hydrolyzed Cow Bone Extract.

At 3% in all four formulas. Synergy Note: Carbomer's contribution to emulsion stability directly supports the consistent delivery of Matrikynes® peptides at their full 3% concentration throughout the cream's shelf life and use cycle.