Chemical Name:Trisodium pyrophosphate、Acid trisodium pyrophosphate、Trisodium
monohydrogen diphosphate
Formula: Na3HP2O7（Anhydrous）、Na3HP2O7·H2O（Monohydrate）
Molecular weight: 243.92（Anhydrous）
CAS: 14691-80-6
Properties:
White powder crystal, soluble in water, water solution near neutral, insoluble in ethanol.It often exists in the form of a hydrate (Na3HP2O7·H2O) and the crystal water is not easily removed.
When heated to above 170 ℃, it can be broken down slowly into sodium acid pyrophosphateand sodium pyrophosphate; when more than 240 ℃ ,it is decomposed into metaphosphate.
Specifications:
Quality index
Na3HP2O7
（ Anhydrous）
Na3HP2O7·H2O
（Monohydrate）
Appearance
White powder
Assay( Na3HP2O7) ,w/%
≥95.0
Assay（P2O5）,w/%
≥57.0
≥53.0
Loss on Drying ,w/%
≤0.5
≤1.0
Loss on Ignition ,w/%
≤4.5
≤11.5
pH Value（10 g/L sol）
6.5~7.5
Arenic（As）/（mg/kg）
≤3.0
Fluoride（F）/（mg/kg）
≤10
Lead (Pb) /（mg/kg）
≤4.0
Heavy metal（as Pb）/（mg/kg）
Water insoluble matter,%
≤0.2
Application:
In food industry, it was used as water retention agent, emulsifier , Flavour enhancer and so on.
Packing:In 25kgs net paper or plastic woven bags.
Storage and Transport:
It should be stored in a dry and ventilative warehouse. Avoid rain and moisture during transport. Furthermore, it should be stored separately from poisonous substance.
