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A nonessential acid amino acid derived from the hydrolysis of protein. Alanine was first synthesized by A. Strecker in 1850. The abbreviation ALA is used in chromatographic testing reports for alanine.

Synonyms and Related Terms

aminopropionic acid; ALA; l-alanine

Chemical structure


Other Properties

Soluble in water, slightly soluble in ethanol. Insoluble in ether and acetone.

Composition C3H7NO2
CAS 56-41-7
Melting Point 297 (dec)
Density 1.401
Molecular Weight mol. wt. = 89.09

Hazards and Safety

Flash point = 314 C Sensitive to air and moisture. Contact may cause irritation.

Fisher Scientific: MSDS


  • G.S.Brady, G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 721
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 205
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998

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