Molecular Formula: Na2HPO4 · 12H 2O
Molecular Weight: 358.0
Properties: White crystal form, relative density 1.52, melt at 35 ℃, and losed 5 crystalline water; at 100 ℃ it will turn to be anhydrous; Anhydrous material is a powder material, weathering in air, easily soluble in water, but insoluble in alcohol, it's water solution is slightly alkaline.
Uses: As a fire-retardant agent for fabric, timber, and paper, also as water softening agent for boiler, food additive, buffering agent, solder, tanning agent, and etc.
Packing and storage: 25kg, 50kg net bags, store at a clean, cool, dry and well ventilated place, avoid moisture.
Standard executed: HG/T2965-2000
|
Item |
Na2HPO4 · 12H 2O | |
|
Industrial Grade |
Food Grade | |
|
Assay, %≥ |
98.0 |
98.0 |
|
P2O5 , % ≥ |
19.2 |
19.2 |
|
pH, (1% water solution) |
8.8-9.2 |
8.8-9.2 |
|
Chloride (as Cl), % ≤ |
-- |
0.014 |
|
Sulphate, %≤ |
0.70 |
0.25 |
|
Fluoride (as F), %≤ |
-- |
0.005 |
|
Heavy metal (Pb), %≤ |
-- |
0.001 |
|
Arsenic (As), %≤ |
-- |
0.0003 |
|
Water insoluble, %≤ |
0.10 |
0.05 |