Registration Dossier
Registration Dossier
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EC number: 271-231-4 | CAS number: 68526-83-0
Endpoint summary
Administrative data
Description of key information
Additional information
Hydrolysis:
Hydrolysis
of an organic molecule occurs when a molecule (R-X) reacts with water
(H2O) to form a new carbon-oxygen bond after the carbon-X bond is
cleaved. Mechanistically,
this reaction is referred to as a nucleophilic substitution reaction,
where X is the leaving group being replaced by the incoming nucleophilic
oxygen from the water molecule.
Chemicals that are susceptible to hydrolysis contain functional groups
that can be displaced by a nucleophilic substitution reaction. Substances
that have the potential to hydrolyze include alkyl halides, amides,
carbamates, carboxylic acid esters and lactones, epoxides, phosphate
esters, and sulfonic acid esters. The
lack of a leaving group renders a compound resistant to hydrolysis.
Aliphatic alcohols are resistant to hydrolysis because they lack a
functional group that is hydrolytically reactive.Therefore, this
fate process will not contribute to a measurable degradative loss of
this substance from the environment.
Phototransformation in air:
Alcohols, C7 -9 -iso, C8 -rich has the potential to degrade in the atmosphere from hydroxyl radical attack and photodegradation can be a predominant daylight atmospheric degradation process for this substance. The photodegradation half-life of this substance as mediated by OH-attack is estimated as 0.85days or 10.2 hours based on a 12-hour sunlight day. The half-life is calculated for a 12 -hr day because it normalizes degradation to standard day-light period during which hydroxyl radicals needed for degradation are generated.
Phototransformation in water and soil:
A conservative approach to estimating a photochemical degradation rate is to assume that degradation will occur in proportion to the amount of light with wavelengths >290 nm absorbed by the molecule. Aliphatic alcohols contain molecules that are oxygenated aliphatic compounds, which absorb UV light below 220 nm, a range of UV light that does not reach the earth's surface. Therefore, aliphatic alcohols will not undergo direct photolysis and this fate process will not contribute to a measurable degradative loss of this substance from the environment.
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