Gum guaiac is a tree resin and crude source of 2,5-di-(4-hydroxy-3-methoxyphenyl)-3,4-dimethylfuran (alpha-guaiaconic acid). The phenolic alpha-guaiaconic acid acts as a colorimetric peroxidase substrate. When reacted with an organic or inorganic oxidizing agent, the alpha-guaiaconic acid is oxidized to a blue-colored quinone. The guaiac reaction has been used to detect trace amounts of heme from hemoglobin in the presence of peroxide. The Nobles test can be performed using 67% (w/v) gum guaiac diluted in 96% ethanol to analyze the level of extracellular oxidase production. Synonyms: Guaiac, Guaiacum, Resin guaiac CAS No: 9000-29-7 Appearance: Off-white to brown powder FT-IR Spectrum: Conforms to reference Melting Point: ~85C (dec) (lit) Storage and Stability: Store at 4C. Stable for 12 months after receipt.
CAS Number:
[9000-29-7]
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