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G8279

Sigma-Aldrich

Gum guaiac

crude colorimetric peroxidase substrate

Synonyme(s) :

Guaiac, Guaiacum, Resin guaiac

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About This Item

Numéro CAS:
Numéro CE :
Numéro MDL:
Code UNSPSC :
12352201

Forme

powder

Pf

85 °C (dec.) (lit.)

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Application

Gum guaiac is a tree resin and crude source of 2,5-di-(4-hydroxy-3-methoxyphenyl)-3,4-dimethylfuran (α-guaiaconic acid). The phenolic α-guaiaconic acid acts as a colorimetric peroxidase substrate. When reacted with an organic or inorganic oxidizing agent, the α-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

Autres remarques

To gain a comprehensive understanding of our extensive range of Polysaccharides for your research, we encourage you to visit our Carbohydrates Category page.

Code de la classe de stockage

11 - Combustible Solids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

dust mask type N95 (US), Eyeshields, Gloves


Certificats d'analyse (COA)

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Consulter la Bibliothèque de documents

S Webendörfer et al.
Deutsche medizinische Wochenschrift (1946), 139(3), 79-83 (2013-10-04)
If the diagnosis is made early the cure rate of bowel cancer is more than 90 %. Occupational preventative medical care required by law and carried out by company physicians can be supplemented by a medical consultation and by simple screenings
Mechanism of Oxidation in the Plant. Part II: An Investigation of Substances which are capable of behaving as Peroxydases.
P H Gallagher
The Biochemical journal, 18(1), 29-38 (1924-01-01)
C K Palmer et al.
British journal of cancer, 110(7), 1705-1711 (2014-03-13)
Screening for bowel cancer using the guaiac faecal occult blood test offered by the NHS Bowel Cancer Screening Programme (BCSP) is taken up by 54% of the eligible population. Uptake ranges from 35% in the most to 61% in the
Hermann Brenner et al.
European journal of cancer (Oxford, England : 1990), 49(14), 3049-3054 (2013-05-28)
There is increasing evidence that faecal immunochemical tests (FITs) for haemoglobin offer a number of advantages over traditional guaiac based faecal occult blood tests (gFOBTs). However, evidence on diagnostic performance from direct comparisons with colonoscopy findings in all participants in
Isolation and characterization of α-guaiaconic acid and the nature of guaiacum blue.
Kratochvil, J.F., et al.
Phytochemistry, 10, 2529-2531 (1971)

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