Within the Refining Nickel Sulphate market, types are classified according to purity level, intended end‑use, and production route. Battery‑grade nickel sulfate, defined by >99.9 % Ni content and stringent impurity limits (Fe, Co, Cu < 10 ppm), commands the highest price premium and underpins the battery manufacturing segment. Technical‑grade material, typically 98–99.5 % Ni, tolerates higher impurity thresholds and is directed toward electroplating and metal‑finishing operations where performance margins are broader. Low‑purity or industrial‑grade variants (≤98 % Ni) are allocated to chemical catalysis and other bulk‑chemical applications, where cost efficiency outweighs strict purity requirements. A further distinction arises from the production pathway: sulfate derived from hydrometallurgical leaching versus pyrometallurgical conversion, each influencing trace‑element profiles and downstream processing costs. The relative market share of these types aligns with application demand; battery‑grade accounts for roughly half of total volume, while technical‑ and low‑purity together represent the remaining portion, reflecting the diversified nature of the market taxonomy.