Registration Dossier
Registration Dossier
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EC number: 292-334-0 | CAS number: 90604-40-3
Basic toxicokinetics
Administrative data
- Endpoint:
- basic toxicokinetics
- Type of information:
- migrated information: read-across based on grouping of substances (category approach)
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
Data source
Reference
- Reference Type:
- publication
- Title:
- Percutaneous absorption of aliphatic compounds.
- Author:
- Iwata Y, Moriya Y, Kobayashi T
- Year:
- 1 987
- Bibliographic source:
- Cosmet. Toiletries 102(2): 53-68
Materials and methods
Test material
- Reference substance name:
- Dodecan-1-ol
- EC Number:
- 203-982-0
- EC Name:
- Dodecan-1-ol
- Cas Number:
- 112-53-8
- Molecular formula:
- C12H26O
- IUPAC Name:
- dodecan-1-ol
- Details on test material:
- n-octyl alcohol; n-decyl alcohol, lauryl alcohol and cetyl alcohol all radiolabelled (1-C14) and >98% pure.
Constituent 1
Results and discussion
Toxicokinetic / pharmacokinetic studies
Toxicokinetic parametersopen allclose all
- Toxicokinetic parameters:
- half-life 1st:
- Toxicokinetic parameters:
- half-life 2nd:
- Toxicokinetic parameters:
- half-life 3rd:
Any other information on results incl. tables
Distribution results were reported for lauryl alcohol (98% pure). 95% of the dose adminstered was recovered from the application site at 24 hours after
dosing. 0.13% remained in the body while 0.10% was excreted in the urine and faeces. 2.61% was excreted in expired air as CO2. The ratio of the
amount of compound excreted via expired air to the amount absorbed is the expiratory excretion rat. It was 91% for lauryl alcohol. The respiratory
excretion rates for all the other alcohols investigated were >65% although all the actual data is not reported.
Absorption decreased with increasing carbon chain length. The absorption rate was investigated in different solvents (squalene, castor oil, triethyl
citrate (TEC). The percutaneous absorption rate of undiluted n-octanol was 50%, this was increased in squalene but decreased in castor oil or
TEC. This was also reported with the other alcohols tested and the tendency was more pronounced at higher concentrations.
The degree of skin irritation was proportionally related to the degree of percutaneous absorption.
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information): no bioaccumulation potential based on study results
Following skin application of lauryl alcohol about 2.84 % of the administered dose was absorbed. Of this absorbed dose >90% was excreted in expired air (CO2). A similar trend was observed with the other alcohols tested. Absorption decreased with increasing carbon chain length and was affected by solvent and concentration.
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