31. Banned will be additives like sulfites, nitrates or nitrite , for example. 32. The most worrisome combination, experts say, is Viagra with amyl nitrite . 33. Treated water is tested for impurities including pathogens, nitrates, and nitrites . 34. Nitrate and nitrite are toxic, but nitrogen is required for biosynthetic processes. 35. Other group I nitrates decompose differently, forming the nitrite salt and oxygen. 36. To the extent that poppers products contain alkyl nitrites , the following applies. 37. Ammonium oxidation is coupled to nitrite reduction to form the harmless dinitrogen gas. 38. Another frequently encountered nitrite is amyl nitrite ( 3-methylbutyl nitrite ). 39. Another frequently encountered nitrite is amyl nitrite ( 3-methylbutyl nitrite ). 40. Another frequently encountered nitrite is amyl nitrite ( 3-methylbutyl nitrite ).