| Description: |
5-Methylfurfural is a naturally occurring substance, found in cigarette smoke condensate, licorice essential oil, stored dehydrated orange powder, baked potato flour, volatile compounds of roast beef, aroma concentrate of sponge cake. bread and in coffee, tea and cocoa. A flavoring agent. |
| In vitro: |
| Journal of Analytical & Applied Pyrolysis, 2006 , 76 (1–2) :214-21. | | Characterization of high molecular mass material in ECF and TCF bleaching liquors by Py-GC/MS with and without TMAH methylation[Reference: WebLink] |
METHODS AND RESULTS:
Typical major pyrolysis products formed from lignin in the ECF bleaching liquor were phenol, 2-methylphenol, guaiacol and 4-vinylguaiacol, whereas crotonolactone and 2-furfural were characteristic degradation products of carbohydrates. Guaiacol, 2-furfural, 2-methylphenol, 2- or 3-ethylphenol, 2-methyl-2-cyclopenten-1-one, 5-Methyl-2-furaldehyde, 2,4-dimethylphenol and 2-methoxy-3-methylphenol were major degradation products formed from HMW TCF bleaching liquors. Only small amounts of chlorinated degradation products were formed from HMW material in the ECF bleaching liquors. The amounts of HMW carbohydrates (such as hemicelluloses) were slightly higher in the liquor obtained after the last step of the TCF than that of the ECF bleaching sequence.
CONCLUSIONS:
Both these liquors consist mainly of lignin matter. |
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