STPP (Sodium Tripolyphosphate) Na5P3O10

Appearance: white powder

Use of this material:

Aplication: Moisture, tough and brittle. It is used in textile industries, paper making, food and petroleum,  food additive

Storage:  cool and dry place

Process of making STPP (referencing)

STPP has been normally made by a process that includes the steps of reacting a sodium compound such as soda ash (Na 2 CO 3 ) or caustic (NaOH) with either wet process phosphoric acid or furnace process phosphoric acid to form a reaction mixture containing monosodium phosphate (NaH 2 PO 4 ) and disodium phosphate (Na 4 HPO 4 ). Precipitating and thereafter removing insoluble impurities from the reaction mixture. Heating the reaction mixture at elevated temperatures for sufficient time to thermally decompose or calcinate the two above-named phosphate compounds into STPP (Na 5 P 3 O 10 ) and to simultaneously remove water from the reaction mixture by volatilization. It should be noted that such processes removed impurities present in the STPP feedstock strictly by precipitation. Easily soluble in water. Used as one of the main auxiliaries for synthetic detergent, synergist for soap, tanning agent for leather making. As an oil contamination resistance agent in paper production. In foodstuff industry it is used as quality improver in the process of canned food, fruit juice drinks, foodstuffs from milk or soybeans. Moreover it is a preservative for seafood, meats, poultry, and animal feeds. It is common in food production. In foods, STPP is used to retain moisture, tought and crispy.