The bottle was quite old, IIRW. Certainly acid fumes could cause gradual corrosion over prolonged periods of time. I think it's a far saner
explanation than direct reaction of iron with CCl4 at RT.
It could also be that the bottle was stored under a fume hood during some synthesis or other. Strong HCl fumes lead very quickly to corrosion of Fe
and Al, even at fairly short exposure times.
If you're worried about the integrity of the CCl4, I wouldn't be.
Tip: when you had trouble filtering, the usual remedy is to pass the filtrate multiple times over the same filter, until it runs clear. Filters,
somewhat paradoxically, really only work well when their pores are partly blocked.
[Edited on 2-3-2014 by blogfast25] |