Chemical reagent grade classification:
Premium grade pure (GR, green label): The main component is very high and the purity is high, suitable for accurate analysis and research work, and some can be used as reference materials.
Analytical purity (AR, red label): high content of main components, high purity, low interference impurities, suitable for industrial analysis and chemical experiments.
Chemically pure (CP, blue label): High content of main components, high purity, presence of interference impurities, suitable for chemical experiments and synthetic preparation.
Experimental purity (LR, yellow label): High content of main components, poor purity, no choice of impurity content, only suitable for general chemical experiments and synthetic preparation.
Indicators and stains (ID or SR, purple label): specific sensitivity is required.
Designated Class (ZD): Chemical reagents customized for specific users in accordance with the quality control indicators required by users.
Electronically pure (MOS): Suitable for the production of electronic products, with extremely low electrical impurity content.
Equivalent reagents (3N, 4N, 5N): the main component content is respectively 99.9%, 99.99%, 99.999% or more