Solvents

Solvents represent a cross-cutting category, essential both in artisanal cosmetics laboratories and in the daily care of skin, hair, and nails. These are liquid substances capable of dissolving, diluting, or carrying other active ingredients, ensuring the correct formulation or application of the final product. Understanding the differences between the main types is the first step to choosing wisely and confidently.

How to choose the right solvent for your needs

The choice primarily depends on the intended use: cosmetic solvents — such as demineralized water, denatured ethyl alcohol, or propylene glycol — meet specific purity standards and are not interchangeable with those for technical or professional use. Before purchasing, always check the declared intended use on the label. A common mistake is to favor the highest concentration thinking it is always the best: in reality, some formulations require precise gradations to work correctly without damaging textures or actives.

Also consider compatibility with other ingredients in your project: not all solvents mix with oils, butters, or powders in the same way. If you are preparing DIY cosmetics or integrating the solvent into a professional routine, consider solubility, volatility, and potential irritants. For any application that goes beyond simple external use, it is always advisable to consult a qualified professional.

Frequently Asked Questions

What is the difference between ethyl alcohol and isopropyl alcohol?

Ethyl alcohol is commonly used in cosmetics and personal hygiene, while isopropyl alcohol is primarily used in technical and professional settings. The two molecules have different properties: before using them, carefully read the technical data sheets and the manufacturer's instructions.

Are cosmetic solvents safe for the skin?

If used according to label instructions and at recommended concentrations, certified cosmetic solvents are generally well tolerated. However, sensitive or reactive skin may respond differently: in case of doubt, consult your pharmacist or dermatologist.

Can I use tap water instead of demineralized water in formulations?

It is not advisable: tap water contains minerals and chlorine that can alter the stability of DIY cosmetic formulations, promote microbial growth, and change the pH. For reliable results, always choose certified demineralized or distilled water.