Ngokuthuthuka kwesayensi kanye nokuthuthukiswa komnotho, izinhlobo eziningi zamakhemikhali zisetshenziswa kabanzi. Kusetshenziswa ekukhiqizweni nasempilweni, kepha ingozi engokwemvelo yokuphepha, izinkinga zezempilo nezemvelo ziya ngokuya zivezwa. Izingozi eziningi eziyingozi zamakhemikhali zingenxa yokuntuleka kolwazi lokuphepha, ungahambisani nezinqubo zokusebenza kanye nemithetho yokuphepha kanye nemithetho. Ngakho-ke, ukuqeda ukusebenza okungaphephile kokulawula abantu, kufanele siqale ngokuqinisa ukuqeqeshwa kokukhiqiza kanye nemfundo.

Ngokuqondene nomsebenzi, ikakhulukazi singomunye womenzi wesifutho seqhwa, intambo eyisilima, isifutho sezinwele, isifutho sombala wezinwele nokunye. Futhi zingumkhiqizo we-aerosols. Kufanele sikwazi kahle ulwazi lokuphepha.

Kunabantu abangama-50 abafunda umhlangano wokuqeqeshwa kolwazi lwezokuphepha ongumfundisi wawo ovela eMnyangweni Ophuthumayo weWengyuan. Lezi zihloko zemihlangano yokuqeqeshwa zikhulume kakhulu ngamathiphu wokuphunyuka, amacala ayingozi kanye nokubaluleka kokufunda ulwazi lokuphepha.

Ngokuqondene nabasebenzi kwinkampani yamakhemikhali, ulwazi lokuphepha kokukhiqiza alunganele, futhi imibono yabasebenzi idinga ukwenziwa ngcono. Ngokwenqubo yokukhiqiza ingeyengozi enkulu, ingcindezi ephezulu, evuthayo, eqhuma embonini, iyunithi lebhizinisi noma umuntu olimazayo nobungozi obuhlangenwe nakho okuhlangenwe nakho kwalo akulona ukuqonda. Ngakho-ke, inkampani akufanele inikeze kuphela ukuqeqeshwa kwezokuphepha kepha futhi nabasebenzi kufanele bafunde ulwazi ngokwabo.

Ukwenza "ukuphepha kuqala, ukuvikela kuqala", ukuqeqeshwa kwezokuphepha kubalulekile kuwo wonke umuntu. Ulwazi Ololophethwe, imfundo yezokuphepha yezimilo, ukulawulwa kwezokuphepha, ngezindlela ezahlukahlukene zemfundo nokuqeqeshwa, ukufeza izimiso zokuphepha, ukuze bonke abasebenzi bahlale bephelele, ukuze bonke abasebenzi bakwazi ukuphelela ngokwengeziwe, badlale ngokugcwele ekukhiqizeni komuntu kanye nobuciko, futhi finyelela umgomo ophakeme kakhulu wokukhiqizwa okuphephile.