Chromatography Forum

Hello.
My noob question.
Doing some researches on carbendazim. I check the internet and decide to do carbendazim stock in methanol with concentration 250ug/ml (25mg in 100ml flask filled with methanol).
The problem is when i use laser (tyndall effect) i can see particles flying there.
I make second stock with lower concetration 100ug/ml and dosent get such effect.

So my question is ... is that correct ? I found some articles and texts in internet where people disolve 25mg and more of carbendazim in 100ml of Methanol...

p.s.
sorry for my english

You might try warming the 250 ppm solution a bit, checking for particles, and then cooling it back to ambient temperature and checking again.

If you're truly on the ragged edge of solubility at ambient temp, it should clear up with a bit of heating, and then may re-precipitate on cooling. On the other hand, it may just be a "kinetic" problem, and the material will stay in solution once dissolved.