Pfanstiehl L-Arginine Hydrochloride, High Purity, Low Endotoxin, Low Metals is a multi-compendial amino acid that has been specifically designed and formulated for therapeutic inhalation formulations and to remove impurities such as endotoxin, trace metals, and nitrosamines. The L-Arginine HCl Inhalation Grade is specifically designed and tested for inhaled pharmaceuticals. Manufactured in the USA under ICH-Q7 cGMP conditions, Pfanstiehl L-Arginine HCl meets parenteral (injectable) excipient grade standards, making it ideal for pharmaceutical, biologic, and vaccine bioprocessing and formulation. Pfanstiehl L-Arginine HCl is often used to protect and prevent aggregation of therapeutic proteins and is available as USP (United States Pharmacopoeia), EP (Ph. Eur.) (European Pharmacopoeia), JP (Japanese Pharmacopoeia) and ChP (Chinese Pharmacopoeia). Compendial, U.S.P. , cGMP , pharmaceutical grade .