CAS# 68957-94-8. 50g. 2,4,6-Tri-n-propyl-2,4,6-trioxo-1,3,5,2,4,6-trioxatriphosphorinane (Propylphosphonic acid anhydride 50% solution in N,N-dimethylformamide) T3P. MFCD00006583. Molecular Weight: 318.20. Molecular Formula: (C3H7O2P)3. Color/form: slightly yellow to brown liq. Strem# 15-9159. http://www.strem.com/catalog/v/15-9159/