Sodium Hydroxide is a strong base in terms of chemical ionization and solutions of it can be assayed using a strong acid, such as Hydrochloric Acid or Sulfuric Acid, or by using an acidimetric standard such as Potassium Hydrogen Phthalate (KHP). from NF/USP material

The Ricca Chemical sodium hydroxide with a composition of 96.09% water and 3.91% sodium hydroxide, is suitable for manufacturing of soap, paper, dyes and petroleum products. It is also used in medicine and pharmaceutical industries. It can be stored at a temperature of 15 to 30 degree C.