di-Sodium oxalate, for analysis, ExpertQ®, ACS, Reag. Ph Eur

- Synonyms: Oxalic acid sodium salt, Soerensen's buffer substances
- Na2C2O4
- M = 134,01 g/mol
- CAS [62-76-0]
- EINECS-No.: 200-550-3
- Solub. in water: (20 ºC): 37 g/l
- Melting point: 250 - 270 ºC (decomposes)
- LD 50 (oral, rat): 7500 mg/kg (oxalic acid)
- EC-Index-No.: 607-007-00-3
- GHS-signal word: Warning
- GHS-H sentences: H302 - H312
- GHS-P sentences: P280 - P264 - P270 - P321 - P301+P312 - P501a
- Tariff number: 2917 11 00 99
- Applications: analytical chemistry, reference material.
- Appearance: White solid

SPECIFICATIONS
assay (permanganometric): min. 99,8 %
insoluble matter: max. 0,005 %
acidity: passes test
chlorides (Cl): max. 0,002 %
phosphates (as PO4): max. 0,005 %
sulfates (SO4): max. 0,002 %
total nitrogen (as N): max. 0,001 %
ammonium (NH4): max. 0,002 %
heavy metals (as Pb): max. 0,001 %
iron (Fe): max. 5 ppm
lead (Pb): max. 0,001 %
potassium (K): max. 0,005 %
substances darkened by H2SO4: passes test
loss on drying (105 ºC): max. 0,01 %