Contractions. - Benz. Ac. Bz.-x.

Benzoic Acid. Hc7h502.

Obtained from benzoin, a balsamic resin, which exudes from the incised bark of the Sty rax Benzoin. Nat. ord., StyracaceAe. It is prepared by sublimation, and can be purchased in a state of purity in crystals.

Characters and Tests. - Light feathery crystalline plates and needles, flexible, nearly colourless, and having an agreeable aromatic odour resembling benzoin. Soluble in 200 parts of cold water, in 25 parts of boiling water, in 4 parts of rectified spirit. Soluble also in solutions of the caustic alkalies and of lime, and precipitated from them by Hydrochloric Acid. When slowly heated it sublimes without residue.

Preparations. - Trituration. Solution in rectified spirit.

Reference to Horn. Proving. - Transactions of Amer. Institute of Horn., vol. i.

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