N-15™ is a powdered chemical treatment for neutralizing spent formalin. Simply add one bottle (or one packet) of N-15™ per gallon of used formalin (or 4% glutaraldehyde). Bottles can be inverted onto collection container to virtually eliminate any airborne powder. Agitate gently and in under 20 minutes, the clear solution can be disposed of without clogging drains. An aldehyde kit is also available to test for residual aldehyde and includes 100 tests per box.