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Registration Dossier
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EC number: 200-540-9 | CAS number: 62-54-4
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Phototransformation in air: Key study: The estimated rate constant for the vapor-phase reaction of Calcium Acetate with photochemically-produced hydroxyl radicals has been estimated as 0.0843 E-12 cm3/molecule-sec at 25 ºC. This corresponds to an atmospheric half-life of about 126.85 days (12-hours day) at an atmospheric concentration of 1.5E(+6) hydroxyl radicals per cm3. (Calculation by EPI Suite v3.20, EPA (USA)/ AopWin v1.92).
Key value for chemical safety assessment
- Half-life in air:
- 126.85 d
Additional information
Key study: Calculation by EPI-Suite, EPA (USA) v3.20 / AopWin v1.92 estimate
Atmospheric Oxidation (25 deg C) [AopWin v1.92]:
Hydroxyl Radicals Reaction:
OVERALL OH Rate Constant = 0.0843 E-12 cm3/molecule-sec
Half-Life = 126.850 Days (12-hr day; 1.5E6 OH/cm3)
Ozone Reaction:
No Ozone Reaction Estimation
Fraction sorbed to airborne particulates (phi):
0.000226 (Junge,Mackay)
Note: the sorbed fraction may be resistant to atmospheric oxidation
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