These are technical NaOH (pellets), so in terms of purity not suitable for the chemical laboratory. Have thus successfully an old electric grill cleaned. Have the concentration a little too high (about 1 part NaOH to two parts water), so that even a part of the painting "adopted" has. This is not a product defect (!); Caustic soda is finally also an effective paint remover.
General: For such work goggles and rubber gloves, long-sleeved clothing as possible. Got to the lip a tiny splash of what has caused quite there the same swelling (after 2 days was also gone).
