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Potassium dichromate, solution 0,04 mol/l, for COD determination

- K2Cr2O7 r- M = 294,19 g/molr- CAS [7778-50-9]r- EINECS-No.: 231-906-6r- Density: 1,004 g/cm3 r- LD 50 (oral, rat): 25 mg/kg (toxic component)r- EC-Index-No.: 024-002-00-6r- ADR: 6.1 T4 III UN 3287r- IMDG: 6.1 III UN 3287r- IATA/ICAO: 6.1 III UN 3287r- GHS-signal word: Dangerr- GHS-H sentences: H334 - H340 - H350 - H360FD - H373 - H315 - H319 - H317 - H412r- GHS-P sentences: P260 - P284 - P305+P351+P338 - P321 - P405 - P501ar- Tariff number: 2841 50 00 00r- Applications: analytical chemistry (determining COD), oxidizing agent.rrSPECIFICATIONSrfactor: 0,999 - 1,001runcertainty ± 0,001 rr1 ml = 0,01176 g K2Cr2O7 This volumetric solution was checked by means of potentiometric methods using a sodium thiosulfate standard solution, that was also checked against Scharlau's potassium iodate volumetric standard. Scharlau's volumetric standards are directly traceable to the Standard Reference Materials from NIST (National Institute of Standards and Technology, USA). r