I-Biphenyl;Phenylbenzene;Diphenyl (CAS#92-52-4)
92-52-4Isingeniso: Ukuqonda ukubaluleka kwayo
Emkhakheni wamakhemikhali, ukuhlonzwa kwezinhlanganisela kubalulekile ocwaningweni, ekuthuthukisweni nasekusetshenzisweni ezimbonini ezahlukahlukene. Enye yezinhlanganisela isihlonzi samakhemikhali92-52-4. Le nombolo eyingqayizivele iyingxenye yokubhaliswa kwesevisi ye-Chemical Abstracts, enikeza isihlonzi senombolo esiyingqayizivele kukhemikhali ngayinye, okuvumela ukuxhumanisa okulula nokuxhumana phakathi kososayensi nabacwaningi.
Inhlanganisela ehlobene neI-CAS 92-52-4ibizwa nge-2,4-dichlorobenzoic acid (2,4-D). Lo muthi wokubulala ukhula usetshenziswa kakhulu kwezolimo ukulawula ukhula lwe-broadleaf ezitshalweni ezahlukene okuhlanganisa okusanhlamvu, amakhambi, namadlelo. Ukusebenza kwayo kanye nokukhetha kwayo kwenza kube ukukhetha okudumile kubalimi nabasebenzi bezolimo.
Indlela yokusebenza ye-2,4-D iwukulingisa ama-isomers e-hormone yezitshalo zemvelo futhi iphazamise amaphethini okukhula ajwayelekile ezitshalo ezizwelayo. Lokhu kungase kubangele ukukhula okungalawuleki, ekugcineni kubangele ukufa kokhula, kushiye utshani nezinye izitshalo zingathinteki. Ikhono lale nhlanganisela ukukhomba izinhlobo ezithile zezitshalo kuyenza ibe yingxenye ebalulekile yamasu okulawula ukhula.
Kodwa-ke, ukusetshenziswa kwe-2,4-D akukhona ukungqubuzana. Ukukhathazeka ngomthelela wayo kwezemvelo kanye nobungozi bezempilo obungaba khona kuye kwaholela ezingxoxweni eziqhubekayo mayelana nokuphepha kwayo. Iziphathimandla zokulawula zikazwelonke zisungule imihlahlandlela nemikhawulo yokusetshenziswa kwazo ukuze kuncishiswe lezi zingozi. Njengoba ucwaningo luqhubeka, ukuqonda umthelela we-2,4-D ku-ecosystem kanye nempilo yabantu kuhlala kuyisizinda socwaningo esibalulekile.
Ngokufigqiwe,I-CAS 92-52-4iyinhlanganisela ebalulekile kwezolimo. Ukuqonda ubunjalo bayo, ukusetshenziswa kwayo, kanye nemithelela kubalulekile ekusetshenzisweni ngendlela efanele kanye nokuphathwa kwezinqubo zezolimo. Ngokuthuthuka kolwazi kukhemistri nesayensi yezemvelo, indima yezinhlanganisela ezifana ne-2,4-D izoqhubeka nokuvela, ibumba ikusasa lezolimo ezisimeme.
