The manufacturing of Viscosan™ has been designed to meet the high standards set by the Pharmaceutical Industry. The purity of the products is generally higher than those commonly found for other chitosans, especially with respect to endotoxin and protein contents (see criteria set in monographs in EP and USP). We provide a certificate with the following information about appearance, viscosity, degree of deacetylation and loss on drying. Additional analyses can be performed on request. For GMP material.