[Safrguns]

>>> Is this the same stuff I use in my fish tank to cure ick?

It is a coloring dye used to stain micro-organisms on laboratory slides.

Very poisonous.

[spectre]

" Used at a very low concentration – about the equivalent of a few raindrops in four Olympic-sized swimming pools of water."

I don't know how they determine the dose for "people"?..

sw

[the long march]

methhylene blue is NOT the same as methyl blue

[momincombatboots]

I believe the toxicity of New Methylene blue C18H22N3S:SCl ZnCl2 may be diff from methylene blue C16H18N3ClS. Our lab always uses New Methylene Blue for RNA.