Tetrasodium Pyrophosphate → HCID 86734064, compound

Participants

Reaction Steps

A 25 weight percent aqueous solution of calcium chloride is added to a 15 weight percent aqueous solution of tetrasodium pyrophosphate in a suitable vessel until the pH reaches 7. The acicular crystals of calcium sodium pyrophosphate tetrahydrate are formed. The crystals are filtered, washed thoroughly, and dried at 60° C. The calcium sodium pyrophosphate tetrahydrate is then heated at a temperature within the range of 175° to 200° C for a period of 60 minutes until 3.2 moles of water of hydration is removed. The dehydrated solids were then ground. The structure of the material is now amorphous as determined by X-ray diffraction.

Provenance & Evidence