Pfanstiehl L-Histidine, High Purity, Low Endotoxin, Low Metals is a multi-compendial amino acid that has been specifically designed and formulated to remove impurities such as endotoxin, trace metals, and nitrosamines. Manufactured in the USA under ICH-Q7 cGMP conditions, Pfanstiehl L-Histidine meets parenteral (injectable) excipient grade standards, making it ideal for pharmaceutical, biologic, and vaccine bioprocessing and formulation. Pfanstiehl L-Histidine is often used to buffer therapeutic proteins and is available as USP (United States Pharmacopoeia), EP (Ph. Eur.) (European Pharmacopoeia), BP (British Pharmacopoeia), JP (Japanese Pharmacopoeia) and ChP (Chinese Pharmacopoeia). Compendial, U.S.P. , cGMP , multicompendial, pharmaceutical grade