Glycerin (USP)

Add to the water phase with mixing until fully uniform. Suitable for both cold-process and heated systems. Compatible with a wide range of formulation types, including gels, emulsions, and surfactant-based systems.

At higher use levels, glycerine may influence viscosity and overall sensory feel; adjust rheology modifiers and emollient balance as needed.

• Generally compatible with most cosmetic ingredients and preservative systems.
• High glycerine levels may increase tack in leave-on products; balance with lower-tack humectants (e.g. pentylene glycol, propanediol) and suitable emollients.
• In surfactant systems, glycerine can improve post-rinse skin feel but may affect viscosity.

• Glycerine contributes a smooth, hydrated skin feel at low to moderate use levels.
• At higher concentrations (typically above ~7–10%), tackiness may become noticeable, particularly in leave-on formulations with minimal emollient content.
• Perceived tack can be reduced by:
  • pairing glycerine with lower-tack humectants (e.g. propanediol or pentylene glycol)
  • incorporating suitable emollients or light esters
  • optimising polymer or emulsifier selection
• Sensory performance is formulation-dependent; bench testing is recommended to determine the optimal balance for the intended product type.

• Hydrating toner (2–5%)
• Humectant gel serum (3–8%)
• Lotion humectant phase (2–6%)

• Too Tack/stickiness → lower % glycerin/ add a secondary humectant with lower tack (pentylene glycol /propanediol)/ or rebalance emollients/rheology.
• Viscosity changes → adjust polymer/rheology
• Surfactant thinning/thickening → salt curve / adjust surfactant ratios

• Store tightly closed in a cool, dry place away from direct sunlight.
• Glycerin is hygroscopic (draws moisture from the air); keep containers sealed between uses to maintain consistency and minimise water uptake.
• Warm slightly (in a warm water bath) if needed to improve pourability in cooler conditions.

Low irritation potential. Suitable for leave-on and rinse-off systems when used within recommended levels.

• SP / PhEur cosmetic grade, vegetable derived.
• Typical assay ≥99.0% (batch-verified by COA).
• Heavy metals ≤5 ppm; compliant with cosmetic specifications.