Sodium hydrophosphite is an inorganic compound, an acid salt of sodium and phosphorous acid with the formula NaH 2 PO 3 , colorless crystals, it dissolves in water, forms crystalline hydrates .
| Sodium hydrogen phosphite | |
|---|---|
| Are common | |
| Systematic name | Sodium hydrogen phosphite |
| Traditional names | Sodium phosphorous, acidic; sodium hydrogen phosphonate |
| Chem. formula | NaH 2 PO 3 |
| Rat formula | NaHPHO 3 |
| Physical properties | |
| condition | colorless crystals |
| Molar mass | 103.98 g / mol |
| Chemical properties | |
| Solubility in water | hydrate - 56.0 0 ; 193.0 42 g / 100 ml |
| Optical properties | |
| Refractive index | hydrate - 1.419; 1.431; 1,449 |
| Classification | |
| Reg. CAS number | |
| Reg. EINECS number | |
Getting
- Neutralization of phosphorous acid with stoichiometric amounts of caustic soda :
Physical Properties
Sodium hydrogen phosphite forms colorless crystals
It is soluble in water.
It forms a crystalline hydrate of the composition NaH 2 PO 3 · 2,5H 2 O, which melts at 42 ° C and loses water at 100 ° C.
Literature
- Chemistry Handbook / Editorial: Nikolsky B.P. et al. - 3rd ed., rev. - L .: Chemistry, 1971. - T. 2. - 1168 p.