Comments on: Duty rate for Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium. http://betterdollar.com/duty-rate-for-sodium-hydroxide-caustic-soda-potassium-hydroxide-caustic-potash-peroxides-of-sodium-or-potassium/ Cross Border Shopping & Flight Guide for Canadians Fri, 14 Aug 2009 18:00:12 +0000 hourly 1 https://wordpress.org/?v=5.8.9