Sodium hydroxide

Sodium hydroxide

 * A strong base
 * Stock solutions are 5 N and 1 N
 * Molecular weight 40.00
 * Exothermic reaction on solution
 * Stock solutions should be stored in plastic bottles, rather than glass.
 * Glass bottles are etched by strong bases over long periods of time.
 * Stock solutions absorb carbon dioxide from the air, and gradually become neutralized.
 * Check normality every year, or remake solutions.
 * Very caustic, wear gloves during use. Wash extensively if spilled.  A soap-like feel indicates that your skin has come in contact with the solution.
 * Neutralize with acid prior to disposal down the drain.