Hydrogen peroxide

Hydrolysis

Administrative data

Endpoint:

hydrolysis

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

other: The reference given is a risk assessment report on hydrogen peroxide considering the available experimental and other data on the substance. Only short summary of original studies/publications are reported.

Data source

Reference

Reference Type:

publication

Title:

European Union Risk Assessment Report, CAS-No. 7722-84-1, Hydrogen peroxide

Author:

European Commission

Year:

2003

Bibliographic source:

Institute for Health and Consumer Protection, European Chemicals Bureau, Existing Chemicals, Second Priority List, Vol. 38

Materials and methods

Test guideline

Qualifier:

no guideline followed

Principles of method if other than guideline:

The reference given is a risk assessment report on hydrogen peroxide considering the available experimental and other data on the substance. Only short summary of original studies/publications are reported.

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

Hydrogen peroxide

EC Number:

231-765-0

EC Name:

Hydrogen peroxide

Cas Number:

7722-84-1

Molecular formula:

H2O2

IUPAC Name:

hydrogen peroxide

Applicant's summary and conclusion

Executive summary:

The following summary is copied from the EU risk assessment carried out for hydrogen peroxide:

"Pure aqueous solutions of hydrogen peroxide are relatively stable. Stability increases with increasing concentration. Stability of pure hydrogen peroxide in pure water is pH dependent. Decomposition is acid and alkali induced. Stability is at a maximum at pH 3.5-4.5 and decomposition rates are highest in alkaline solution.

Degradation in the aquatic environment takes place in the presence of a catalyst. Most transition metals, and especially Fe, Mn and Cu may have significant influence on degradation rates of hydrogen peroxide in natural waters.

Degradation rates in filtered natural waters have been studied. Filtering natural water samples do in some extent allow to differentiate between biodegradation and abiotic elimination processes. In filtered (0.45 μm) Greifensee water 0.5 μM initial concentration degraded at rate of t½ = 25-100 hours. Greifensee is an eutrophic lake in Switzerland (DOC 4-5 mg/l, nitrate 1.5 mg/l, Fe = 20 μg/l, Mn = 10 μg/l) (Sturzenegger, 1989). The half-life of H2O2 in sea water samples from the Bay of Biscayne (filtered 0.2 μm, initial concentration 3.4 μg/l) was 60 hours (Petasne and Zika, 1987). The half-life of H2O2 in sea water samples from the Mediterranean shallow lagoon Etang de Tau (filtered 0.2 μm) was 50-70 hours (k0.2= 0.013-0.010 h-1) (Herrmann and Herrmann, 1994)."