The second tier of market taxonomy classifies Zinc Ammonium Chloride by physical form and purity grade. Three crystalline variants dominate: anhydrous, monohydrate, and pentahydrate, each exhibiting distinct hygroscopic behavior that influences handling costs and downstream process efficiency. The anhydrous grade, comprising about 40 % of production, is favored in high‑temperature metallurgical fluxes where moisture introduction would impair melt fluidity. Monohydrate, accounting for roughly 35 % of output, balances solubility and stability, making it the preferred choice for textile dye‑fixation and water‑treatment dosing. Pentahydrate, with a 15 % share, is employed where rapid dissolution is required, such as in electroplating baths. Superimposed on these forms are purity classifications—technical (≥ 95 %), industrial (≥ 80 %), and pharmaceutical (≥ 99.5 %). Technical grades dominate the textile and metallurgical markets, industrial grades serve bulk water‑treatment, while the pharmaceutical segment commands the highest purity tier, adding a disproportionate value despite its modest volume share.