CAS Registry Number: [68-04-2]
Chemical Formula: C6H5O7Na3
E-Number: E331
Characteristics
Trisodium citrate anhydrous occurs as white, granular crystals or a white, crystalline powder. It is freely soluble in water and practically insoluble in ethanol (96%).
The advantages compared to trisodium citrate dihydrate are as follows:
- Solubility
A comparison of the solubility between trisodium citrate dihydrate and trisodium citrate anhydrous clearly shows that trisodium citrate anhydrous is much better and easier soluble. - Efficiency
The maximum water content of trisodium citrate anhydrous is 1 % whereas it is between 11.0 and 13.0 % for the dihydrate form. Therefore, trisodium citrate anhydrous has a 11 to 14 % higher product content than dihydrate and is thus more efficient in the formulation. - Mixtures with other acids
Trisodium citrate anhydrous can be mixed in any ratio with other acids without lump forming. Where mixtures of citric acid and trisodium citrate dihydrate are prone to caking, the use of trisodium citrate anhydrous will not have such problems. - Free flowing powder with surfactants
Trisodium citrate anhydrous can be mixed with surfactants and still maintains a free flowing powder. - Free flowing powder with perfumes
Trisodium citrate anhydrous will remain a free-flowing powder even when perfume content reaches 6 %. The perfumes may be solvent or oil based. - Free flowing powder with peroxides
Trisodium citrate anhydrous will remain a free-flowing powder even when peroxide content reaches 6 to 7 %.
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