Description

Catalogue Number

119898

Synonyms

Phosphate standard for aqueous matrices ready for use

Product Information

HS Code

2835 24 00

Quality Level

MQ100

Physicochemical Information

Density

0.998 g/cm3 (20 °C)

Safety Information according to GHS

Storage class

10 - 13 Other liquids and solids

WGK

NWG not water endangering

Disposal

28

Aqueous solutions: Container D.

Storage and Shipping Information

Storage

Store at +15°C to +25°C.

Specifications

Concentration β (PO₄³⁻)

990 - 1010 mg/l

Determination method: Alkalimetric titration.

The content of this solution was determined with sodium hydoxide standard solution (article number 1.09141) standardized against volumetric standard potassium hydrogen phthalate (article number 1.02400). 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 84L (NIST: National Institute of Standards and Technology, USA) by means of volumetric standard potassium hydrogen phthalate, measured in the accredited calibration laboratory of Merck KGaA, Darmstadt, Germany in accordance to DIN EN ISO/IEC 17025.