How the Research Chemicals Market Works: Regulation, Supply and Quality
REACH and CLP set the European baseline for how laboratory substances are registered, classified, labelled and documented. National law decides the rest, which is why the same compound can be routine in one Member State and controlled in another.
The Complete Guide to Analytical Reference Standards
Two bottles, same compound, same purity figure, and only one can calibrate a method. This guide works through reference materials, certification, traceability, uncertainty and impurity standards using openly published metrology sources.