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EC number: 233-135-0 | CAS number: 10043-01-3
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Aluminum sulfate cannot be oxidized and atmospheric transformations would not be expected to occur during transport. If aluminum metal particulates were released to air during metal processing, they would be rapidly oxidized.
it is not applicable for an inorganic compound wich dissociates.
Using the AOPWIN QSAR model, the photochemical degradation rate of Aluminium sulphate in the atmosphere is 0.1400 E-12 cm3/molecule-sec, with a resultant predicted half live of 76.400 Days (12-hr day; 1.5E6 OH/cm3)
OVERALL OH Rate Constant = 0.1400 E-12 cm3/molecule-sec
HALF-LIFE = 76.400 Days (12-hr day; 1.5E6 OH/cm3)
Key value for chemical safety assessment
- Half-life in air:
- 76.4 d
- Degradation rate constant with OH radicals:
- 0 cm³ molecule-1 s-1
Additional information
Phototransformation in air is not possible because aluminum sulfate cannot be oxidized and atmospheric transformations would not be expected to occur during transport.
If released to air, a vapor pressure of 6.01E-024 mm Hg at 25 deg C ( 6.01E-024 mm Hg is equivalent to vapour pressure of 8.02E-022 Pa ) indicates that Aluminium sulphate will exist solely as a vapor in the atmosphere. Vapor-phase Aluminium sulphate will be degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals; the half-life for this reaction in air is estimated to be 76.4 days, calculated from its rate constant of 0.1400 E-12 cm3/molecule-sec at 25 deg.
Aluminium sulphate do not contain chromophores that absorb at wavelengths >290 nm and therefore Aluminium sulphate is not expected to be susceptible to direct photolysis by sunlight.
Aluminum sulfate cannot be oxidized and atmospheric transformations would not be expected to occur during transport. If aluminum metal particulates were released to air during metal processing, they would be rapidly oxidized.
In air, aluminum sulfate will react with moisture and produce sulfuric acids, and aluminum oxide. Since these aluminum sulfate is usually not emitted to air, the amount of aluminum present in air would be negligible compared with the amount coming from natural erosion of soil.
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