Global Calcium Private Limited manufactures Copper Gluconate. Global Calcium Private Limited is an ISO 14001:2004 and ISO 9001:2008 certified company. The Copper Gluconate has technical features like: Description: Blue or bluish green or greenish blue powder. Solubility: Soluble in water Chloride: Max.0.07% Sulphate: Max.0.05% Arsenic: Max.3 ppm Lead: Max.0.0025% Reducing substances: Max.1.0%