Trisodium phosphate Reagent grade A.R. Reagent grade C.P. Pharmaceutical grade
Item Index Index Index
Assay % ≥98 ≥97 ≥98
Clarity Experiment Pass Pass ——
Free Alkali% ≤1.5 ≤3 ≤3
Disodium Salt% ≤0.5 ≤1 ≤1
Chlorides(CL) % ≤0.005 ≤0.005 ≤0.005
Sulphates(SO4)% ≤0.01 ≤0.03 ≤0.03
Nitrogen compound(N) % ≤0.002 ≤0.005 ≤0.005
Fe% ≤0.0005 ≤0.002 ≤0.002
As% ≤0.0003 ≤0.001 ≤0.0003
Heav metal % ≤0.001 ≤0.002 ≤0.001


Packing& Storage

Packing In 25Kg/woven bag lined with double-layer plastic bag
Storage 20℃, 2 years.
Shipping Room temperature in China; may vary elsewhere


General Information

1.1 Chemical & Physical Properties

Common Names Three sodium phosphate | Trisodium phosphate
CAS No. 7601-54-9 Boiling Point (℃) 158ºC at 760 mmHg
Molecular Weight 163.94 Melting Point (℃) 73.3-76.7ºC
Appearance White powder Vapor Specific Gravity N/A
HS Code 2835311000 Flash Point (℃) N/A
Solubility Soluble in water, its aqueous solution is alkaline. Insoluble in alcohol. Easy deliquescence. Autoignition Temperature (℃) N/A


1.2 Safety Information

Safety Phrases  S26-S36/37/39-S45-S24/25
RIDADR UN 3262 8/PG 3
WGK Germany 1
Packaging Group N/A
Hazard Class N/A


Inhalation Cough. Sore throat. Use local exhaust or breathing protection. Fresh air, rest.
Skin Redness. Burning sensation. Itching. Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes Redness. Pain. Wear safety goggles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion Abdominal pain. Nausea. Vomiting. Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention .


1.3 Synthetic Route

Spray drying method to add trisodium phosphate dodecahydrate crystals to 10%~15% water in the dissolution tank, heat to 85~95 °C, stir and dissolve, purify the solution, pump the refined solution to the metering tank, atomize by the sprayer, the atomizer adopts a two-flow air nozzle, the direction angle of the atomized steam is 30 ° with the level, the atomized steam pressure is 0.15~0.3 MPa, the inlet temperature is 650~750 °C, and the outlet temperature is 140~170 °C for spray drying to prepare anhydrous trisodium phosphate finished products.

2. Disodium hydrogen phosphate is generated by the neutralization reaction of phosphoric acid and soda ash, and then neutralized with caustic soda and refined by refining. It can also be prepared by the neutralization reaction of thermal phosphoric acid and caustic soda, and prepared by cooling crystallization, separation and drying.