Hello there.

I use Laboratory heptane of purity 99.99% for extraction, with this tek
https://wiki.dmt-nexus.m...ybrid_ATB_%27Salt%27_Tek

Always after decanting the heptane from the vessel, i throw him away.
Because its kinda expensive, I wonder how many times I can use it, before it wears out?

and second one.
can i buy somewhere syringe to suction the heptan from boiling jar?

Greeting!

You can reuse the heptane (after the freeze)...forever (or near enough).
but it may pick up yellow colour (normal and totally fine)

You can use syringe but Not with rubber/plastic seal (plunger) as it with react and dissolve with the solvent.

for this reason I always threw him away;p




the pharmacy syringe will not be good then? only glass or some "speacial plastic" ?;p
i try to buy pipette in several chemical stores, but the biggest which i can buy there, are with a capacity 10-15ml ;/