Caffeoylmalic acid reference substance is a primary reference standard with certified absolute purity (considering chromatographic purity, water, residual solvents, inorganic impurities).
This product is delivered as Lithium salt. Please note that the given CAS # refers to the free base as there is no CAS # for the Lithium salt available. The counterion is determined quantitatively and treated as an impurity in the calculation of the absolute purity of this reference substance. The assigned absolute purity on the certificate of analysis of this reference standard, therefore, refers to the pure Caffeyolmalic acid.
This reference substance has been prepacked and is available in 10 mg portions only. Therefore, the discount scheme for larger units is not applicable to this reference standard.
This product is delivered as Lithium salt.
The substance is hygroscopic! Therefore, the appearance of the substance in the vial may differ from the information given on the certificate of analysis due to absorption of humidity. The exact weight is given on the label of the vial. In order to produce a stock solution of known concentration please transfer the contents of the vial quantitatively into a volumetric flask by repeated rinsing with excess solvent and then fill to the mark.
soluble in diethyl ether, methanol and water
usually a stock item
in styrofoam box together with deep frozen gel packs