Colour Standard USP (631) Cupric Sulfate CS

This CRM is intended for the examination of the degree of colouration of liquids related to USP <631>.

Certification

This CRM has been manufactured and tested in accordance with Ph. Eur. 2.2.2 using a sample of this lot taken at the time of manufacture. This solution meets the requirements of USP <631> for Color and Achromicity.

Metrological Traceability

Measurements are derived from and traceable to the SI system of units through the use of balances calibrated against NPL’s national standard for mass. The balances used in this process are calibrated on a regular basis with the calibration being traceable to National Institute Standards and Technology (NIST) and other recognised national standards laboratories. This certificate provides traceability of measurement to recognised national standards, and to units of measurement recognised at National Institute Standards and Technology (NIST) and other recognised national standards laboratories All temperature measurements are traceable to the International Temperature Scale 1990 and were ade using thermometers with calibrations traceable to the National Physical Laboratory (NPL), the National Institute of Standards and Technology (NIST), or other recognised national standards laboratories Where required Class A laboratory glassware is used.