Why would they try to restrict phenolphthalein? If it's being restricted in the UK, as OP questions, then it seems to me that they've run out of ideas
of prevention of illicit drug synthesis. I can only hope that they're not restricting it for its use as a pH indicator; after doing some reading
though, apparently it's used as a cutting agent, which still seems like a silly reason to restrict it. I hope OP wasn't right about that particular
one, because seriously, this seems like a last-ditch effort.
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