Cub has few bottles of "Methylamine solution"
Concentration is yet unknown so density will be measured to make sure.Cub has a question though.He has heard that methylamine hydrochloride is very stable,now he's wondering if same is true for methylamine water solutions.These bottles might be over 15 years old.Thanks.

MeNH₂.HCl will last a long time in solution, bright stars synth states that hes seen 40yo MeNH₂.HCl been used with good results.

As for basifying it to get MeNH₂ sure but you need to dissolve it in MeOH not water.

ApprenticeCook: Aqueous Methylamine is usually a 40% w/w solution of the freebase, not the salt.

Cublium: If the solutions are clear and not discolored, I'd say they are fully intact.

Solution is water white,more viscous than water and has a very fishy smell.Thanks,for help.

Arghghghghghghg .... I hate the term "water white" .. its completely meaningless.  Its "transparent and colorless" or even "clear"!!!!!!!!!

Fan of Shulgin

Solution is water white,more viscous than water and has a very fishy smell.Thanks,for help.

That sounds OK... 40% aq methylamine is colourless and indeed has a fishy smell. If it shows a yellowish or brownish discolouration, you may suggest that the product has degraded over time.