Registration Dossier

Physical & Chemical properties

Partition coefficient

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Principles of method if other than guideline:
Method: other (measured): Monsanto Environmental Sciences method ES-79-M-15: Log Kow of the substance was measured by equilibrating aqueous solutions of radiolabelled compounds with n-octanol. The concentrations of the substance in each phase were determined by Liquid Scintillation Counting (LSC).
GLP compliance:
no
Type of method:
other: equilibrating aqueous solutions of radiolabelled compounds with n-octanol
Partition coefficient type:
octanol-water
Key result
Type:
log Pow
Partition coefficient:
-3.4
Remarks on result:
other: Temperature and pH not stated

Test concentration       Kow

            50 mg/l                4.46 x 10-4
            500 mg/l               3.49 x 10-4

Test concentrations are expressed as active acid.

Conclusions:
log Kow value of -3.4 was obtained for the substance using a relevant method. The result is considered to be reliable.

Description of key information

Partition coefficient: log Kow < -3.4 (read across from DTPMP acid)

Key value for chemical safety assessment

Log Kow (Log Pow):
-3.4

Additional information

A log Kow value of -3.4 was determined for the acid form of DTPMP in a reliable study conducted according to an appropriate test method. The result is considered to be reliable and has been assigned as key study. This value is read across to the sodium salts as <-3.4.