These unique plates include calcium sulfate hemihydrate (CaSO4¹/₂H2O), a refined form of gypsum, in the adsorbent formulation

Plates with fluorescent indicator feature a short wave UV indicator that is fluorescent at 254nm.

Note: Because of the high solubility of the gypsum binder in aqueous solutions, plates are not recommended for use in systems containing greater than 20% water.

Gypsum functions as a binder, improving the cohesion of the adsorbent particles and increasing the adhesion of the layer to the glass substrate. These plates are made in the classic style and are thus softer than plates with organic binder. Plates are commonly scraped from the glass backing to isolate separated components for other analytical procedures. The plates are compatible with all organic solvents. No organic substances are added to these products, thus making them compatible with sulfuric acid charring visualization.