Sulfuric acid, C16-C18 (even numbered) alkyl esters, sodium salts and C16-18 (even numbered) alcohols

Dissociation constant

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

Test material information

Constituent 1

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."