Registration Dossier
Registration Dossier
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EC number: 406-250-0 | CAS number: 72619-32-0 HALOXYFOP R-(+)-ME HERBICIDAL CHEMICAL
Phototransformation in air
Administrative data
Link to relevant study record(s)
- Endpoint:
- phototransformation in air
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
- Qualifier:
- according to guideline
- Guideline:
- other: EU Council Directive 91/414/EEC, Annex II, point 2.10, as amended by Directive 94/37/EC
- Deviations:
- no
- GLP compliance:
- no
- Remarks:
- This report represents data generated after the effective date of the EPA FIFRA Good Laboratory Practice Standards
- Specific details on test material used for the study:
- Haloxyfop (R) methyl ester
Purity: Not reported - Details on test conditions:
- The Atmospheric Oxidation Program (AOP, version 1.89 Syracuse Research Corp., Syracuse, New York, USA) estimates the rate constant for the atmospheric, gas-phase reaction between hydroxyl radicals and organic chemicals. In this study, the reaction rate of the test substance was modelled by the AOP with output parameters of hydrogen abstraction, reaction with N, S and -OR, addition to triple and olefinic bonds, and addition to aromatic and fused rings. The overall rate constant was used to determine the atmospheric half-life of the test substance.
- Key result
- DT50:
- 6.14 h
- Key result
- Reaction with:
- OH radicals
- Rate constant:
- 0 cm³ molecule-1 s-1
- Conclusions:
- Overall rate constant 20.89E-12 cm3/molecule-sec
- Executive summary:
To meet the requirements of EU Council Directive 91/414/EEC, Annex II, point 2.10, as amended by Directive 94/37/EC, the atmospheric half-life for the reaction of the test subtance has been calculated using the Atmospheric Oxidation Program (AOP), Syracuse Research Corporation.
Using the AOP, an overall rate constant of 20.89E-12 cm3/molecule-sec was calculated for the test substance at hydroxyl radical concentration of 1.5E6 radicals/cm3 and a 12-hour daylight period. The resultant half-life was calculated to be 6.14 hours.
Reference
Description of key information
Study Type |
Study Details | Value | Guideline | Reliability |
| Phototransformation in Air | OH radicals |
DT50 = 6.14 h |
EU Council Directive 91/414/EEC, Annex II, point 2.10 |
1 |
Key value for chemical safety assessment
- Half-life in air:
- 6.14 h
Additional information
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