Merck 119812 0500 Ammonium Standard Solution Traceable To Srm From Nist Nh4Cl in H2O 1000 Mg/L Nh4+ Certipur® 500 ML.

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Description
Catalogue Number	119812

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Product Information
HS Code	2827 10 00
Quality Level	MQ100

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Physicochemical Information
Density	0.99 g/cm3 (20 °C)
pH value	5.4 (H₂O, 20 °C)

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Safety Information according to GHS
Storage class	10 - 13 Other liquids and solids
WGK	NWG not water endangering
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 (NH₄⁺)	990 - 1010 mg/l
Determination method: Argentometric titration.\nThe content of this solution was determined with silver nitrate standard solution (article number 1.09081) standardized against volumetric standard sodium chloride (article number 1.02406). The expanded measurement uncertainty is ± 0.4 % (k=2 coverage factor for 95% coverage probability). The certified value is traceable to primary standard NIST SRM 999b (NIST: National Institute of Standards and Technology, USA) by means of volumetric standard sodium chloride, measured in the accredited calibration laboratory of Merck KGaA, Darmstadt, Germany in accordance to DIN EN ISO/IEC 17025.