I can only tell you that with US-sourced phenidone I have never had an issue with it coming out of solution at 1% in propylene glycol. Is it possible that you actually have Metol? In Europe I trust stuff from Suvatlar from my experience.
So far I have used phenidone from two different sellers:
- AxelColor (found on ebay, from somewhere in Italy if I remember correctly), which was good,
- and then earlier this year from Synthetika, which did not work as it should at all, as others here seem to have observed.
I've just got some new phenidone from Suvatlar, but haven't used it yet, which will almost certainly work as it should.
So far I have used phenidone from two different sellers:
- AxelColor (found on ebay, from somewhere in Italy if I remember correctly), which was good,
- and then earlier this year from Synthetika, which did not work as it should at all, as others here seem to have observed.
I've just got some new phenidone from Suvatlar, but haven't used it yet, which will almost certainly work as it should.