12788-93-1 193425-34-2 37203-75-1 67167-51-5 Butyl acid phosphate [UN1718] [Corrosive] Butyl phosphoric acid EINECS 235-826-2 JP 504 PV 1 (antiforaming agent) Phoslex A 4 Phosphoric acid, butyl ester UN1718 n-Butyl acid phosphate