Escentials of Australia
Tetrasodium EDTA
Tetrasodium EDTA
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ethylenediaminetetracetic acid
Fine white (slightly water soluble) powder
Country of Origin: China
It is added to cosmetics, including shampoos and soaps to work in synergy with preservatives and to improve product stability. It does this by chelation and sequestering, which, in short, means it prevents any material changes to products that might otherwise be caused by traces of mineral or metal in the ingredients. For this reason it is a very popular water softener.
Tip - if you find yourself desperately needing to manufacture without pure water then this is a good go-to product.
Useage
Creams and Lotions
0.1 to 0.4% to counteract defaming action of hard water
0.5 to 1.0% (by weight) to protect against discoloration and rancidity caused by reaction with metal
Soap
Shampoos add 0.25% for enhanced shelf life and softening water used in dilution of shampoo.