0.3M Sodium hydroxide is supplied as a ready to use solution. This solution is predominantly ionic as it contains sodium cations and hydroxide anions. The hydroxide anion makes Sodium hydroxide a strong base which reacts with acids to form water and the corresponding salts.
0.15M Sodium hydroxide is a ready to use ionic solution. It is extensively used for neutralizing acids and preparing
sodium salts of reagents. Can also be used during northern blotting for RNA transfer and fixing