Urea irashobora gukoreshwa mubwinshi nkibikoresho fatizo kugirango habeho umusaruro wa melamine, urea formaldehyde resin, hydrazine hydrate, tetracycline, Phenobarbital, cafeyine, kugabanuka kwijimye BR, phthalocyanine B, phthalocyanine Bx, monosodium glutamate nibindi bicuruzwa. Ifite ingaruka nziza kuri c ...
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