Fibroin derived and purified from silk. White powder, Slightly soluble in water. Total nitrogen: over 14.6; Average diameter: 40+/-2 um; pH: 5.5; Free of pathogenic bacteria.
Fibroin derived and purified from silk. White powder, Slightly soluble in water. Total nitrogen: abover 14; Average diameter: 2+/-0.5 um; pH: 5.5; Free of pathogenic bacteria.