Natural Sourcing has launched a grapefruit seed extract for the preservation of natural formulations. Grapefruit Seed Extract (GSE) INCI: Citrus Grandis (Grapefruit) Extract (and) Glycerin) is a broad spectrum, citrus-based antimicrobial that can be used to extend product shelf life (two years) and protect personal skin care formulations against bacteria and fungus.
The extract, which is 60% grapefruit seed extract and 40% USP vegetable glycerin, possesses strong antiseptic, germicidal, antibacterial, fungicidal and anti-viral properties and also acts as an antioxidant. Its antibacterial property protects against Gram-positive and Gram-negative bacteria including Escherichia coli and Staphylococcus Aureus. Its fungicidal property protects against Pseudomonas aeruginosa, Aspergillus flavus and Aspergillus niger. In addition to the above properties, the extract can also be used to help disinfect laboratory utensils and manufacturing equipment.
The extract is non-toxic and non-irritating when used at dilutions of up to 2%. It is biodegradable, non-corrosive and considered environmentally safe. The heavy viscous liquid is lemon yellow in color and has a mild citrus aroma. It can be formulated into: moisturizers, serums, balms, facial toners, mud packs, exfoliants, personal fragrance products, liquid soaps and hair care products. It is soluble in water, glycol, alcohol and organic solvents.
The extract is compatible with nonionic agents, citric acid, ascorbic acid, acetic acid, sodium acetate, potassium hydroxide, borax, sodium sulfate, sodium carbonate and isopropanol alcohol. It is not compatible with anionic wetting agents.