Iziqukathi zamathangi e-ISO ziyiziqukathi ezijwayelekile ezenzelwe ukuthutha uketshezi namagesi. Lezi zitsha zihlangabezana nezinga le-ISO 1496 lamazwe ngamazwe leziqukathi zokuthutha futhi zisetshenziselwa ukuthutha okuphephile nokuvikelekile koketshezi, amakhemikhali, namagesi olwandle, ujantshi nomgwaqo. Iziqukathi zamathangi e-ISO ziklanywe ngezinto eziqinile, ezihlala isikhathi eside njengensimbi engagqwali, zizenze zimelane nokugqwala futhi ziqinisekise ukuthi ziyakwazi ukuphatha izinhlobo zamakhemikhali noketshezi. 

Afakwe ama-valve, ama-baffles okuphepha, nezinhlelo zokulawula izinga lokushisa ukuze kuqinisekiswe ukuthuthwa okuphephile kwezimpahla eziyingozi nezingezona ubungozi. Ukumiswa kwamathangi e-ISO kuvumela ukuthuthwa okuphumelelayo kwe-intermodal, kuhlinzekele ukuguquguquka kwamabhizinisi adinga ukuthumela impahla ngezindlela eziningi zokuthutha.