Sodium Hydroxide (10% solution): 16 oz bottle (473 mL)This product can ONLY be shipped via ground service. At checkout, please select a Ground Service shipping option. If you choose non ground service method, we will need to contact you to resolve and your order may be delayed. Sodium Hydroxide, 10% solution, 16 oz bottle (473 mL). NOT FOR ACID TESTING This strong solution is used to raise the pH of the sample in the Ripper Test and should not be confused with the 0. 1N Sodium Hydroxide used in the Acid