Glycerin (USP/ Ph Eur) - Vegetable Glycerol

Glycerin (also known as glycerol or glycerine) is a water-soluble humectant naturally present in the skin and widely used across cosmetic formulations to support hydration and skin comfort.

It is one of the most established ingredients in cosmetic science, valued for its reliability, broad compatibility, and well-understood performance.

What is Glycerin (USP/ Ph Eur) - Vegetable Glycerol & why is it used?

In formulations, glycerin helps attract and retain water within the upper layers of the skin, supporting moisture balance and flexibility. Because it performs a function similar to naturally occurring skin components, it integrates easily into a wide range of product types and skin applications.

Glycerin is commonly combined with other humectants and emollients to optimise hydration while maintaining a balanced sensory profile.

QUALITY MATTERS

Why specification quality matters

Our glycerin is supplied as a high-purity cosmetic grade, batch tested for clarity, consistency, and assay to support reliable formulation performance.

Appearance Clear, colourless viscous liquid

Solubility Water soluble

Primary function Humectant

Use level 1.0–10.0%

Behaviour in formulations

Glycerin is compatible with:

cold-process and heated systems
gels, emulsions, and surfactant-based products
a wide range of actives and functional ingredients

It is typically added to the water phase and mixes readily under standard processing conditions.

Sensory notes

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.

Formulation considerations

PROCESSING

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.

COMPATIBILITY

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.

Stable across typical cosmetic pH ranges (approx. 3–10).

FORMULATION EXAMPLES

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

Use level considerations

Recommended range 1.0–10.0%

Suggested starting level 1-10%%

At typical cosmetic use levels (approximately 1–5%), glycerin provides effective hydration with good sensory acceptance. At higher concentrations, it may contribute to tackiness if not balanced appropriately within the formula.

Formulators often manage this by adjusting humectant blends, emollient systems, or rheology modifiers depending on the product type.

Formulation summary

Glycerin remains a core formulation ingredient due to its dependable performance, safety profile, and versatility. When used thoughtfully within a system, it supports hydration while allowing flexibility across a wide range of cosmetic applications.

Quality notes

Our glycerin is supplied as a high-purity cosmetic grade, batch tested for clarity, consistency, and assay to support reliable formulation performance.