Registration Dossier

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:
other: Experiment well described, conducted by specialized people using pure material.

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

Reference
Name:
Unnamed
Type:
Constituent
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.

Applicant's summary and conclusion