Hi Jacqueline,
It’s definitely a little tricky when it comes to finding an official ACS monograph for 1N KOH solution. As you might expect, ACS-grade chemicals are often focused on solids and dry reagents, consultar ingreso solidario and when it comes to pre-made solutions, the certification can sometimes get a little murky.
That said, there are plenty of vendors out there (like Fisher, Sigma, and VWR) that make ready-to-use 1N KOH solutions, though you'd want to double-check if they specifically carry ACS grade. Alternatively, if you’re feeling adventurous (and need something super fresh), you can always whip up your own 1N solution—it's pretty straightforward to do if you’ve got a good balance between KOH and H2O.
