Contractions. - Natr-n. Na-n. Present name. - Sodic Nitrate. NaNo3. Prepared from the native salt (Cubic Nitre) by solution in distilled water and re-crystallization.

Characters and Tests. - In colourless obtuse rhombohedral crystals, having a cooling saline taste. Thrown on the fire, it deflagrates; warmed in a test-tube with Sulphuric Acid and copper wire, it evolves ruddy fumes. It is soluble in about 2 parts of cold distilled water. The solution gives no precipitate with Nitrate of Silver or Chloride of Barium.

Preparations. - Trituration. Solution in distilled water for lx; rectified spirit may be used for all above.

Reference to Horn. Proving. - Noack and Trinks. Zeitsch. fur Erfahr., i.

Proper forms for dispensing. - lx to 3, Trituration. 1x, Solution. 1 and upwards, Tincture, Pilules, or Globules.