sodium fluoride
formula:NaF
m. w. : 41.99
properties: it is a white crystal. its relative density is 2.558, m.p. 993°C and b.p. 1704 °C .it is insoluble in ethanol and has toxic. its aqueous solution willetch glass.
specifications:
|
additive of toothpaste |
high-grade |
first-grade |
NaF: |
98.0%min. |
98.0%min. |
98.0%min. |
| water-insoluble matter: |
0.5%max. |
0.5%max. |
0.5%max. |
SO4 : |
0.2%max |
0.3%max |
0.3%max |
| SiO2 : |
0.5%max. |
0.5%max. |
0.5%max. |
HF: |
0.1max |
0.2%max |
0.2%max |
| Na2 CO 3 : |
0.2%max |
0.2%max |
0.5%max. |
Moisture: |
0.5%max. |
0.5%max. |
0.5%max. |
| Pb: |
0.005%max. |
|
|
Fe: |
0.005%max. |
|
|
| As: |
0.0005%max. |
|
|
packing: in plastic woven bags of 25 kg with plastic lining.22mt/20'fcl. |
