Guaiacol

Oxidation reduction potential

Administrative data

Endpoint:

oxidation reduction potential

Type of information:

experimental study

Adequacy of study:

other information

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference

Reference Type:

publication

Title:

Abiotic Fe(III) induced mineralization of phenolic substances

Author:

PRACHT J., BOENIGK J., ISENBECK-SCHRÖTER M., KEPPLER F., SCHÖLER H.F

Year:

2001

Bibliographic source:

Chemosphere, 44 (4), 613-619

Materials and methods

Principles of method if other than guideline:

see details on methods

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

Guaiacol

EC Number:

201-964-7

EC Name:

Guaiacol

Cas Number:

90-05-1

Molecular formula:

C7H8O2

IUPAC Name:

Phenol

Details on test material:

guaiacol purchased rom Aldrich (99%)

Results and discussion

Any other information on results incl. tables

Guaiacol clearly shows a redox reaction with significant production of CO2. Mineralization of guaiacol also occurs using the mineral iron (III) phase ferryhydrite as the oxidant, although the reduced availability of this form resulted in less CO2 production than when soluble Fe(III) was used. The ratio of the number of moles of Fe(II) produced is estimated to be around 3.5. After 18 h, 0.26 µmol CO2 was produced. During the first reaction step guaiacol is oxidized while Fe(III) is reduced, and o-quinone can be produced. Then a splitting of the quinone ring occurs, producing muconic acid or beta-keto-omega-hydroxycarbonic acid and liberation of CO2.