This handy little A5 notepad is the perfect companion in the lab. Protect your labbook from water and ethanol splashes while preparing buffers and reagents by rather using this nerdy notepad to scribble down your notes or calculations - the formula you're looking for is c = mass/molecular weight*volume ;) The back of each page is blank which works great for planning your workflow, or doodling while you're waiting for the generator to kick in.