Propanediol is a versatile ingredient that is used in many cosmetic and body care products for its many functions. It is a natural solvent derived from corn sugar that can dissolve substances found in cosmetic formulas. Propanediol is also a natural emollient that moisturizes the skin when applied topically, reducing water loss and leaving the skin feeling softer. It works as a natural preservative in skin care and body products, increasing the shelf life of products and promoting lasting freshness. Propanediol can also improve product texture and consistency, making it useful in a wide range of products, including antiperspirants/deodorants, shampoos and conditioners, styling gel, hair masks, hair spray, toothpaste, mouthwash, hand sanitizer, sunscreens, and baby cleansers.
Propanediol is considered a safer ingredient than propylene glycol, which is also known as 1,2-propanediol. It is related to propylene glycol, which is a notorious skin irritant, but is thought to be safer and less irritating. Propanediol is also known to have a preservative-boosting function. It is extensively used in almost every cosmetic and skincare product because of its ability to act as a multi-purpose ingredient that can function as a solvent, humectant, preservative, carrier for active cosmetic ingredients, penetration enhancer, and even an emollient.
Propanediol is generally considered safe for use in skin care products, but it can cause skin, eye, or lung irritation in some people. However, it is important to note that cosmetics and personal care products are not required to be tested for safety before being allowed on the market. The Skin Deep® scoring system was designed to help the public understand whether a product is safe to use or whether it contains ingredients of concern. The safest products score well by both measures, with a low hazard rating and a fair or better data availability rating.
