Note: A 50% Sodium hydroxide solution can be purchased from any of the following suppliers. You must visit the supplier’s product homepage to order and to get more details of the product.
From Sigma Aldrich
Product specification: Sodium hydroxide solution 50% in H2O
From Merck Millipore
Product specification: 158793 Supelco Sodium hydroxide solution 50%
From fisher scientific
Product specification: Sodium Hydroxide Solution (50% w/w), Fisher Chemical™
Product specification: Sodium hydroxide solution 50% (w/w) ∼12.5 N in aqueous solution, Reagent Grade
From Alfa Aesar
Product specification: 33382 Sodium hydroxide, 50% w/w aq. soln.