tri-Sodium citrate dihydrate, for analysis, ExpertQ®, ACS, ISO, Reag. Ph Eur

- C6H5Na3O7·2H2O
- M = 294,10 g/mol
- CAS [6132-04-3]
- EINECS-No.: 200-675-3
- Solub. in water: (25 ºC): 425 g/l
- Melting point: 150 ºC (anhydrous substance)
- Tariff number: 2918 15 00 10
- Applications: analytical chemistry, in buffer solutions, for the analysis of: aminoacids, in food industry (E-331), emulsifier, antioxidant, preservative agent.
- Appearance: Blanco

SPECIFICATIONS
assay (titration with HClO4): min. 99,5 %
assay (titr. with HClO4, referred to dried sample): 99,0 - 101,0 %
identity (IR-spectrum): passes test
appearance of solution: clear and colourless
insoluble in water: max. 0,005 %
pH (5 %, H2O): 7,5 - 9,0
acidity or alkalinity: passes test
chlorides (Cl): max. 0,001 %
oxalates (C2O4): max. 300 ppm
phosphates (as PO4): max. 0,002 %
sulfates (SO4): max. 0,004 %
total nitrogen (as N): max. 0,001 %
ammonia (NH3): max. 0,003 %
calcium (Ca): max. 0,005 %
heavy metals: max. 5 ppm
iron (Fe): max. 5 ppm
substances darkened by H2SO4: passes test
water (K.F.): 11,0 - 13,0 %