We are the prefessional Amino acid in China. We can provide high quality, lowest price and reliable service. Product Name: D-His-OH CAS#: 351-50-8 Synonyms:D-Histidine Molecular Formula: C6H9N3O2 Molecular Weight: 155.16 Packaging:25kg/drum Appearance: White to off-white powder Purity: NLT99%