1.} ọgbọ nke mbụ nke auxiliarier
[1839 ~ 1904] Na 1904] N'obodo a, obodo a na-eme na-eme ka ndị na-eme njem .}}}}}}}} OR NWA EGO NA-EGO NA-EKWU NKE NIILE NA-EGO NA-EKWU OKWU EGO .
N'afọ 1839, achọpụtara Vibenanization .
Na 1844, inorganic sulfide na-eme nchọpụta carbonate na-eduzi carbonate .
N'afọ 1846, nchọpụta nke ndị na-achọ ịlụ ọgụ, nchọpụta nke sọlfọ chloride .
N'afọ 1904, achọpụtara na enwere ike iji carbon ojii nwere ike iji ya na roba .
{0 0}}} ọgbọ nke atọ nke auxiariar
[1980 ~ Na-egosi isi njirimara nke mpempe akwụkwọ rọba bụ nchebe gburugburu ebe obibi na ọtụtụ ọrụ .
N'afọ 1980 ~ 1981, a mepụtara NSS na-emepụta .
N'afọ 1985, ewebata nchekwa gburugburu ebe obibi MTT .
Kemgbe 1991, sulfosaline Nchebe gburugburu ebe obibi na-abụghị nitrosalides, sọlfọ, ndị na-akwalite na ndị ọzọ na-akwalite, CBTD, CBTD, KTBT, Zbec, Zebec, Astoc, Zebec, Astoc, Zebec, Zebec, Zebec, Astoc nke na-aga nke ọma .