I-phenol eyi-crystal (C₆H₅OH, ebizwa nangokuthi i-carbolic acid) — into eqinile emhlophe enephunga elibukhali esetshenziswa ekwenzeni ama-resin e-phenolic, upende namakhambi. Iyagqiba futhi inobuthi — ibanga ukusha okukhulu kwamakhemikhali uma ithinta isikhumba. Isetshenziswe ekhabetheni lomoya ugqoke izivikelo ezigcwele.