Sodium dihydrogen phosphate dihydrate, for analysis, ExpertQ®, Reag. Ph Eur
- Synonyms: Sodium biphosphate, Monosodium orthophosphate, Primary sodium phosphate, Sodium phosphate monobasic
- NaH2PO4·2H2O
- M = 156,01 g/mol
- CAS [13472-35-0]
- EINECS-No.: 231-449-2
- Solub. in water: (20 ºC): 850 g/l
- Melting point: 60 ºC
- LD 50 (oral, rat): 8290 mg/kg (anhydrous substance)
- Tariff number: 2835 22 00 00
- Applications: analytical chemistry, laboratory reagent, for pharmaceutical use, in food industry (E 339).
SPECIFICATIONS
assay (acidimetric, referred to dried sample): 98,0 - 100,5 %
identity: passes test
appearance of solution: clear and colourless
insoluble matter: max. 0,2 %
pH (5 %, H2O): 4,2 - 4,5
chlorides (Cl): max. 0,005 %
fluorides (F): max. 0,0010 %
sulphates (SO4): max. 0,01 %:
arsenic (As): max. 0,0001 %
cadmium (Cd): max. 1 ppm
calcium (Ca): max. 0,005 %
cobalt (Co): max. 0,005 %
copper (Cu): max. 0,005 %
heavy metals (as Pb): max. 0,0010 %
iron (Fe): max. 0,001 %
lead (Pb): max. 0,0001 %
magnesium (Mg): max. 0,005 %
mercury (Hg): max. 1 ppm
nickel (Ni): max. 0,005 %
potassium (K): max. 0,005 %
zinc (Zn): max. 0,025 %
reducing substances: passes test
loss on drying (130 ºC): 21,5 - 24,0 %
| Reference | ||
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SO0332005P |
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SO03320500 |
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SO03321000 |
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