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Registration Dossier
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EC number: 204-881-4 | CAS number: 128-37-0
Phototransformation in air
Administrative data
Link to relevant study record(s)
- Endpoint:
- phototransformation in air
- Type of information:
- calculation (if not (Q)SAR)
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
- Remarks:
- Internationally accepted method, EPI-Suite, EPA (USA)
- Principles of method if other than guideline:
- Calculation by EPI-Suite, EPA (USA) / AopWin v1.92
- GLP compliance:
- no
- Validity criteria fulfilled:
- not applicable
- Conclusions:
- Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 18.2887 E-12 cm3/molecule-sec
Half-Life = 0.585 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 7.018 Hrs
Ozone Reaction: No Ozone Reaction Estimation
Reaction With Nitrate Radicals May Be Important!
Fraction sorbed to airborne particulates (phi): 3.17E-006 (Junge,Mackay)
Note: the sorbed fraction may be resistant to atmospheric oxidation - Executive summary:
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 18.2887 E-12 cm3/molecule-sec
Half-Life = 0.585 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 7.018 Hrs
Ozone Reaction: No Ozone Reaction Estimation
Reaction With Nitrate Radicals May Be Important!
Fraction sorbed to airborne particulates (phi): 3.17E-006 (Junge,Mackay)
Note: the sorbed fraction may be resistant to atmospheric oxidation
Reference
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 18.2887 E-12 cm3/molecule-sec
Half-Life = 0.585 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 7.018 Hrs
Ozone Reaction: No Ozone Reaction Estimation
Reaction With Nitrate Radicals May Be Important!
Fraction sorbed to airborne particulates (phi): 3.17E-006 (Junge,Mackay)
Note: the sorbed fraction may be resistant to atmospheric oxidation
Description of key information
Based on estimated data the phototransformation of BHT in air is as follows:
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 18.2887 E-12 cm3/molecule-sec
Half-Life = 0.585 Days (12-hr day; 1.5E6 OH/cm3)
Half-Life = 7.018 Hrs
Ozone Reaction: No Ozone Reaction Estimation
Reaction With Nitrate Radicals May Be Important!
Fraction sorbed to airborne particulates (phi): 3.17E-006 (Junge,Mackay)
Note: the sorbed fraction may be resistant to atmospheric oxidation
Key value for chemical safety assessment
Additional information
Key study: Estimated data using EPI-Suite (EPA, USA)
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