The kit contains a set of seven brownish yellow colour reference standards (identified sequentially from BY1 to BY7) and a 3.7% hydrogen chloride solution in water. The solutions are produced from three primary metal salt solutions of ferric(III) chloride, cobalt(II) chloride, and copper(II) sulfate pentahydrate, in accordance with chapter 2.2.2 ′Degree of colouration of liquids′ of the European Pharmacopoeia (Ph. Eur.).

• Ready-to-use solutions
• Prepared and qualified in accordance with Ph. Eur.
• Available in tamper-evident 2 ml ampules
• Expiry dated on the label with a limited shelf life
• Accompanied with a detailed certificate of analysis for an effective quality management system

The reference standards are used as calibration and/or quality control standards to measure the degree of coloration of liquids in the brown-yellow-red colour range.

This is a set of the following color reference solutions according to PhEur:

Colour Reference Solution BY1 - 2 ml ampoule
Colour Reference Solution BY2 - 2 ml ampoule
Colour Reference Solution BY3 - 2 ml ampoule
Colour Reference Solution BY4 - 2 ml ampoule
Colour Reference Solution BY5 - 2 ml ampoule
Colour Reference Solution BY6 - 2 ml ampoule
Colour Reference Solution BY7 - 2 ml ampoule
Blind sample : Hydrochloric acid solution, 3.7% in water - 2 ml ampoule