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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Link to relevant study record(s)

Description of key information

Isoamyl isovalerate is a small aliphatic ester with a molecular weight of 172.3 g/mole. It has limited water solubility (48 mg/L) with a partition coefficient (Log Pow) of 3.8 at pH 7.4 and a vapor pressure of 1.3 hPa at 20°C. With these physical/chemical (phys/chem) properties, oral, dermal and inhalation exposures are all potential routes of exposure. 

1.       The test item can be assumed to be absorbed by the oral, dermal, and inhalation routes of exposure, however default absorption values are used in the derivation of DNELs, according to REACH guidance R.8 page 19

2.      The test item is rapidly and completely hydrolyzed to form isoamyl alcohol and isovalerate.  

3.       Both isoamyl alcohol and isovalerate are readily incorporated into intermediary metabolism.

4.       There is no evidence of the formation of reactive or toxic metabolites from either isoamyl alcohol or isovalerate.  

5.       The test item is unlikely to bioaccumulate because of its extensive metabolism and rapid excretion.  

Key value for chemical safety assessment

Bioaccumulation potential:
no bioaccumulation potential
Absorption rate - oral (%):
50
Absorption rate - dermal (%):
50
Absorption rate - inhalation (%):
100

Additional information