Merck 119899 0500 Nitrite Standard Solution Traceable To Srm From Nist Nano2 in H2O 1000 Mg/L No2

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Description
Catalogue Number	119899
Synonyms	Nitrite standard for aqueous matrices ready foruse

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Product Information
HS Code	2834 10 00
Quality Level	MQ100

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Physicochemical Information
Density	1.001 g/cm3 (20 °C)
pH value	7 (H₂O, 20 °C)

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Safety Information according to GHS
Storage class	10 - 13 Other liquids and solids
WGK	WGK 2 obviously hazardous to water
Disposal	28\nAqueous solutions: Container D.

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Storage and Shipping Information
Storage	Store at +15°C to +25°C.

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Specifications
Concentration     β (NO₂⁻)	990 - 1010 mg/l
Determination method: Cerimetric titration.\nThe content of this solution was determined by back-titration with Ammonium(II) ferrous sulfate (article number 1.03792) standardized by Cerium(IV) sulfate (article number 1.09092) against volumetric standard Iron(II)ethylendiammonium sulfate (article number 1.02402). The expanded measurement uncertainty is ± 0.7 % (k=2 coverage factor for 95% coverage probability). The certified value is traceable to primary standard NIST SRM 8040 (NIST: National Institute of Standards and Technology, USA) by means of volumetric standard Iron(II)ethylendiammonium sulfate measured in the accredited calibration laboratory of Merck KGaA, Darmstadt, Germany in accordance to DIN EN ISO/IEC 17025.