Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information


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:

Isoundecanol (Alcohols, C9 -C11, branched) 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 as0.62days or 7.4 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.