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Sodium metaarsenite, solution 0,05 mol/l (0,1 N)

- NaAsO2r- M = 129,91 g/molr- CAS [7784-46-5]r- EINECS-No.: 232-070-5r- Density: 1,01 g/cm3 r- LD 50 (oral, rat): 41 mg/kg (pure substance)r- EC-Index-No.: 033-002-00-5r- ADR: 6.1 T4 III UN 1686r- IMDG: 6.1 III UN 1686r- IATA/ICAO: 6.1 III UN 1686r- GHS-signal word: Dangerr- GHS-H sentences: H350 - H412r- GHS-P sentences: P280 - P273 - P201 - P308+P313 - P405 - P501ar- Tariff number: 2842 90 80 80r- Applications: analytical chemistry, titrant in volumetric analysis.rrSPECIFICATIONSrfactor: 0,999 - 1,001runcertainty ± 0,001 rr1 ml = 0,004946 g As2O3 1 ml = 0,006495 g NaAsO2 This volumetric solution was checked by means of potentiometric methods using an iodine standard solution, that was also checked against Scharlau's potassium dichromate volumetric standard. Scharlau's volumetric standard solutions are directly traceable to the Standard Reference Materials from NIST (National Institute of Standards and Technology, USA). r