Propylene Glycol

Product Benefits

• Moisturises and nourishes dry skin by attracting environmental humidity; commonly used in creams and lotions for its moisturizing and texture-enhancing properties.

• Suitable for eczema‑prone and psoriasis‑prone skin when used in leave‑on or rinse‑off products, and aids the formulation of skincare and cosmetic formulations by improving consistency and effectiveness.

• Great for soothing the skin and helping reduce the appearance of redness in lightweight formulas.

• Supports a calm and balanced complexion without leaving a sticky residue.

• 100 % water‑free, so it will not set off premature fizzing in bath bomb powders.

• Versatile solvent for botanical extracts, essential oils, and flavour oils; suitable for use in cosmetics, including a wide range of formulations such as creams, lotions, and other skincare products.

• Vegan, cruelty-free, and synthetically produced to a consistent cosmetic grade.

Product Description

Propylene Glycol is a clear, virtually odourless, and viscous liquid humectant prized for its ability to hold and deliver moisture without adding free water to a formulation. This anhydrous nature makes it the go‑to humectant for creating vibrant, fizzy bath bombs that stay dry and shelf‑stable until they hit the tub, helping to prevent premature fizzing by keeping the ingredients water-free and stable.

Propylene Glycol acts as a carrier for fragrance oils and active ingredients in various formulations, ensuring even distribution and effective delivery. Monopropylene glycol (MPG), often abbreviated as 'PG', refers to high-purity grades of propylene glycol suitable for food, cosmetic, and pharmaceutical applications. In food applications, it is commonly used as a preservative and humectant to maintain freshness and prevent drying or degradation of products.

Beyond bath fizzies, Propylene Glycol is an industry‑standard moisturising agent, lubricant, and solvent in serums, toners, hair sprays, deodorants, and other formulations.

At low percentages, it draws ambient moisture to the skin’s surface, helping to keep dry or flaky areas feeling soft and comfortable. Its light, non‑greasy skin feel and excellent solvent power mean you can use it to incorporate tricky fragrance oils, active botanicals, or food‑grade flavours into both waterless and water‑based products. Vegetable glycerine is another common ingredient often used alongside propylene glycol in these liquids and blends, each offering unique benefits depending on the formulation.

Because it is completely water‑free, it will not trigger the citric acid–bicarbonate reaction that powers bath bombs. Formulators, therefore, add Propylene Glycol whenever they need humectant benefits in a powder blend that must remain inert until contact with bath water, helping to prevent unwanted reactions and maintain product stability.