In cosmetic formulation, each ingredient should be chosen for the function it performs within the system. Vegetable glycerine, cetyl alcohol and xanthan gum can be used to modify hydration, texture or viscosity, but they are not interchangeable.
Concentrations and processing conditions depend on the complete formula and the technical data sheet for each raw material. If the product will be applied to the skin or sold, the formulation must be properly assessed and preserved.
What is vegetable glycerine used for?
Glycerine is a water-soluble humectant that can be incorporated into certain cosmetic formulas to help retain moisture and modify product feel.
It should not be treated as an oil. The appropriate amount depends on the type of formula, the other ingredients and the desired finish.
What is cetyl alcohol used for?
Cetyl alcohol is a fatty alcohol used as a consistency agent, emollient and co-emulsifier in certain emulsions. It can add body and improve the feel of creams or lotions.
On its own, it does not replace a complete emulsifying system. Incorporation should follow the formula procedure and ingredient documentation.
What is xanthan gum used for?
Xanthan gum is a thickener used to increase viscosity and help stabilise aqueous phases. The amount required depends on the desired texture and the complete composition.
To reduce lumps, it may require pre-dispersion or a specific incorporation method depending on the formulation.
Which ingredient should you choose for each objective?
| Objective | Ingredient to consider |
|---|---|
| Humectancy | Vegetable glycerine |
| More body in an emulsion | Cetyl alcohol |
| Increase viscosity of an aqueous phase | Xanthan gum |
Common mistakes
- Copying percentages from another recipe without checking the complete formula.
- Confusing a co-emulsifier with a complete emulsifier.
- Adding a thickener without controlling its dispersion and hydration.
- Not measuring pH when the formula requires it.
- Selling a formula without the applicable assessments and requirements.
Frequently asked questions
Is glycerine an oil?
No. It is a water-soluble compound with different behaviour from oils.
Is cetyl alcohol a disinfectant alcohol?
No. It is a fatty alcohol used as a formulation ingredient.
Can xanthan gum be used to make gels?
It can be used as a thickener in certain aqueous formulas, but final texture depends on the complete system.
Conclusion
The best way to work with these ingredients is to start from a defined formula, consult the technical documentation and change one variable at a time. Avoid universal percentages out of context.
