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Ammonium iron(II) sulfate, solution ~ 0,12 mol/l (0,12 N), for COD determination, according to ISO 6060

- (NH4)2Fe(SO4)2·6H2Or- M = 392,13 g/molr- CAS [7783-85-9]r- EINECS-No.: 233-151-8r- Density: 1,025 g/cm3 r- Solub. in water: (20 ºC): miscibler- Tariff number: 2833 29 90 00r- Applications: determining COD.rrSPECIFICATIONSrtiter : 0,119 - 0,129 mol/lruncertainty : ± 0,001rr1 ml = 0,047056 g (NH4)2Fe(SO4)2·6H2O This volumetric solution was checked by means of volumetric methods using a potassium dichromate standard solution, that was also checked against Scharlau's sodium thiosulfate standard solution. Scharlau's volumetric standards are directly traceable to the Standard Reference Materials from NIST (National Institute of Standards and Technology, USA). r