(carboxylatomethyl)dodecyldimethylammonium

Partition coefficient

Link to relevant study record(s)

Reference

Endpoint:

partition coefficient

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)

Deviations:

not specified

GLP compliance:

no

Type of method:

flask method

Partition coefficient type:

octanol-water

Specific details on test material used for the study:

100 g of the test substance, Lauryl Betaine (Lot 53983K16) was placed in an oven at 110°C for 5-6 hours to drive off the water. A 2 g sample of ‘dehydrated’ lauryl betaine was measured at 88.5% Solids using a pan drying method at 110°C for 1 hour.

Key result

Type:

log Pow

Partition coefficient:

0.07

Temp.:

25 °C

pH:

7.3

Details on results:

Lauryl Betaine, lot 53983K16
Sample pH Analysis (1 gram, 1 hour @ 110°C)
First 7.3 39.24
Second 7.3 38.73
Third 7.3 40.63
Average 39.53 (1.0)
Calculation
The partition coefficient is defined as:
Pow = conc in n-octonol / conc in H2O
Lauryl Betaine, Pow = ( 39.5/ 46.4 ) = 0.851
Log Pow = -0.070

Description of key information

Lauryl Betaine is a surfactant containing both water soluble and oil soluble portions within its structure. It is known to be water soluble and partially soluble in n-octanol. This test has confirmed that this substance is n-octonol soluble at a level of 39.5% ± 1.0%.

The partition coefficient has been shown to be

P_ow = 0.85

Log P_ow = -0.070

Key value for chemical safety assessment

Log Kow (Log Pow):

0.07

at the temperature of:

25 °C