Allantoin is a non-toxic, odorless, non-stimulating white crystal. It is a high-quality cosmetic raw material. It can be directly used as an additive in high-grade cosmetics and other daily chemical products (such as toothpaste, shampoo, soap, etc.). It has the functions of moisturizing, protecting tissues, hydrophilicity, absorbing water and preventing water loss. In addition, it has a protective effect on hair. It can keep hair from splitting and hair continuously. It can make skin and lips soft, elastic and glossy, and has been widely used abroad. Because allantoin is an amphoteric compound, it can combine with many substances to form metal salts and adducts, and the chemical combination products formed by allantoin do not destroy the original function of each component. For example, the combination of allantoin and 5% para-aminobenzoic acid (PABA), because PABA itself can be synthesized with the stratum corneum, its effect will not be weakened by bathing and sweating. If combined with methylketone, it can also reduce the sensitization reaction of PABA, absorb and filter the ultraviolet rays of red spots with wavelength of 2800-3200 in sunlight, which is the most protective effect and the most widely used shade for sunspots in the ultraviolet range. One of the photosensitizers is very effective in preventing skin cancer caused by ultraviolet rays.

The derivatives of allantoin can be used to prepare various lotions, powders, aqueous solutions and tinctures, which are very popular. For example, alpolygal powder has the functions of detoxification, smooth skin, anti-inflammation and bacteriostasis. Shampoo can resist irritation, reduce scales and make hair soft. For example, alcloxa, aluminum chloride hydroxyallantoic acid, can be made into 0.2% to 0.5% tincture, and can be made into scent, scrub, wash, deodorant and cleaning lotion. Allantoin and its derivatives have not been reported to have skin irritation, photosensitivity, allergic reaction and other toxic and side effects at home and abroad, and are safe for external use. As an important component of cosmetics, it has been paid more and more attention and has broad prospects.