Substancegroup
Alkalising agents / Acids / Neutralising agents
Description
In all hair dyes ammonia or similar substances (such as monoethanolamine and ammonium carbonate) are used as alkalising agents; their amounts and pH values are different. Alkalis are necessary for hair dyeing because they cause the hair to swell, and the salts as well hydrogen bonds in the hair keratin are absorptive. Only then the dye can penetrate the cortex through the cuticle layer. In general, not only alkalising agents but also acids are used for the adjustment of the desired pH value (or for the neutralisation of acid or alkaline mixtures) in the production of many cosmetic products.
Examples for ingredients / INCI
Acetic Acid
2-Amino-2-methylpropanol
Ammonia
Ammonium Bicarbonate; Ammonium Hydrogencarbonate
Ammonium Carbonate
Calcium Hydroxide
Citric Acid; 2-Hydroxy-1,2,3-propanetricarboxylic Acid
Disodium Phosphate; Disodium Hydrogenorthophosphate
Disodium Pyrophosphate; Disodium Dihydrogenpyrophosphate
Ethanolamine; 2-Aminoethanol; Monoethanolamine (MEA/MELA); 2-Hydroxyethylamine
Hydrochloric Acid
Phosphoric Acid; Orthophosphoric Acid
Potassium Citrate; Citric Acid, Potassium Salt
Potassium Phosphate
Sodium Acetate; Acetic Acid, Sodium Salt
Sodium Bicarbonate; Sodium Hydrogencarbonate
Sodium Citrate; Citric Acid, Sodium Salt
Sodium Hydroxide
Sodium Metaphosphate
Sodium Phosphate, Sodium Dihydrogen Phosphate
Sodium Trimetaphosphate; Trisodium Trimetaphosphate
Tetrapotassium Pyrophosphate
Tetrasodium Pyrophosphate
Triethanolamine (TEA); 2,2',2''-Nitrilotriethanol; Tris(2-hydroxyethyl)amine; Trolamine
Typically included in the following product groups