Physical and Chemical Characteristics General Solubility in water at 1% Complete pH (1% solution) 6.7 to 7.3 Loss on drying < 6% Total nitrogen (TN) 9.5 to 10.5 α-amino nitrogen (AN) 5.0 to 5.8% AN ÷ TN × 100 51 to 57 Residue on ignition < 25.0% Chloride as NaCl < 20.0% Molecular weight distribution (g per 100 g) > 10,000 daltons 0.3 1,000 to 10,000 daltons 8.0 500 to 1,000 daltons 17.7 300 to 500 daltons 18.7 < 300 daltons 55.3
