Why is the current classification for nPB wrong?
A similar chemical, Iso Propyl Bromide was cited as a known fertility toxicant to justify the change. Studies now show that the Iso Propyl Bromide metabolises in a completely different way to nPB and therefore direct comparisons cannot be drawn. More recent work shows that any fertility effect, which is first seen after exposure to > 500ppm, is based on the secondary narcotic effect and not a direct effect. Therefore we believe that the R60 classification is not sustainable.
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