Hydroxychloroquine Sulphate in Powder Form is odourless and has a bitter taste. The Hydroxychloroquine Sulphate is freely soluble in water and insoluble in alcohol, in chloroform and in ether. The Hydroxychloroquine Sulphate is a white or practically white crystalline powder. The Hydroxychloroquine Sulphate in Powder Form melts at 204 ° C.