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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Dissociation constant

Currently viewing:

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."