Dear Mr/Miss:we are information below :we are the most manufacturer for manganese chloride.At asia, our manganese chloride production is one and only over pass u.s.a USP29 attestation. If you need our production , please call to us.our production:1.manganese chloride anhydrous2.manganese chloride monohydrate3.manganese chloride tetrahydrate(Crystals)4.1-5mm manganese chloride granule5.Hydroquinone6.1,4-Dihydroxybenze7.P-Benzoquinone8.Manganese Carbonate