Looking at the CAS number[1], it's the sodium oxide component of it that's likely the problem, yeah. And yep, Na2O + H20 -> 2 NaOH, sodium hydroxide :) [1] ht

Looking at the CAS number[1], it's the sodium oxide component of it that's likely the problem, yeah. And yep, Na2O + H20 -> 2 NaOH, sodium hydroxide :) [1] https://www.epa.govt.nz/database-search/chemical-classification-and-information-database-ccid/view/14E9B028-323F-4B0F-AE8A-644018F1057C https://www.epa.govt.nz/database-search/chemical-classificat...