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Physical & Chemical properties

Dissociation constant

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Administrative data

Endpoint:
dissociation constant
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data

Data source

Reference
Reference Type:
publication
Title:
SIDS Initial Assessment Report For SIAM 22 Long Chain Alcohols
Author:
OECD
Year:
2006
Bibliographic source:
http://www.aciscience.org/docs/Draft_SIDS_Long_Chain_Alcohols_1.pdf

Materials and methods

Principles of method if other than guideline:
No details provided. Only statement.

Test material

Constituent 1
Chemical structure
Reference substance name:
Hexadecan-1-ol
EC Number:
253-149-0
EC Name:
Hexadecan-1-ol
Cas Number:
36653-82-4
Molecular formula:
C16H34O
IUPAC Name:
hexadecan-1-ol

Results and discussion

Dissociating properties:
no

Any other information on results incl. tables

The OECD document contains following statement: (page 16):

"Long chain aliphatic alcohols are extremely weak acids and only dissociate under strongly basic conditions (pH >16 approximately). In the range of pH usually considered relevant to the environment, i.e. pH 4-9, these substances will be non-ionised."

Applicant's summary and conclusion

Executive summary:

The OECD document contains following statement: (page 16):

"Long chain aliphatic alcohols are extremely weak acids and only dissociate under strongly basic conditions (pH >16 approximately). In the range of pH usually considered relevant to the environment, i.e. pH 4-9, these substances will be non-ionised."