4-Piperidinecarboxylic acid, hydrochloride (1:1)

Water solubility

Administrative data

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

26 August - 22 December 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2016

Report date:

2016

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7840 (Water Solubility)

Deviations:

no

GLP compliance:

yes

Type of method:

flask method

Test material

Test material information

Constituent 1

Reference substance name:

4-piperidinecarboxylic acid hydrochloride

EC Number:

611-901-9

Cas Number:

5984-56-5

Molecular formula:

C6H11NO2.HCl

IUPAC Name:

4-piperidinecarboxylic acid hydrochloride

Test material form:

solid: particulate/powder

Details on test material:

- Name of test material (as cited in study reports): JNJ-150098-AAC (T001310)
- Physical state: solid
- Appearance white powder

Specific details on test material used for the study:

- Batch n°: I14KB4913
- Analytical purity: 97.4% (base titration)
- Expiration date: 23 November 2020 (retest date)
- Storage condition: at room temperature

Results and discussion

Water solubility

Key result

Water solubility:

401 g/L

Conc. based on:

test mat. (dissolved fraction)

Remarks:

concentration analysed after centrifugation

Loading of aqueous phase:

504 g/L

Incubation duration:

>= 24 - <= 72 h

Temp.:

20 °C

pH:

1.6

Details on results:

Preliminary test
The content of test item dissolved in the water sample was 431 g/L after one centrifugation step and 345 g/L after two centrifugation steps.

Main test
The results for the samples taken at 24, 48 and 72 hours are given in the table in the next section.
In the blank, a small amount of test item was measured (0.17 mg/L). Contribution to the test samples however was negligible.
The concentration in the 72 hours stirred sample was 1554 g/L after four centrifugation steps and 408 g/L after five centrifugation steps. The 408 g/L concentration was comparable to the concentrations found for the 24 and 48 hours stirred samples which had been centrifuged four times. Based on this, it was concluded that the result of the four times centrifuged sample stirred for 72 hours was an outlier and that four centrifugation steps had been sufficient to remove all undissolved test item.
The water solubility of the test item is therefore reported as the mean of the values obtained for the 24 and 48 hours stirred samples centrifuged four times and the value obtained for the 72 hours stirred sample, centrifuged five times. The water solubility calculated in this way was 401 g/L. The guidelines prescribe to test at a nominal concentration five times higher. Nominal concentration in this test was 504 g/L. Testing at a higher nominal concentration is not possible since the viscosity of the mixtures would become too high for stirring or mixing by shaking.

Any other information on results incl. tables

The results for the samples taken at 24, 48 and 72 hours are given in the table underneath.

Stirring time (hours)	Centrifugation steps	Analysed concentration (g/L)	Mean (g/L)	Maximum Difference (MD) (%)	pH
24	4	394	401	3.5	1.6
48	4	402			1.6
72	4	1554*			1.6
72	5	408			1.6

*Outlier, not used for further calculations.

Applicant's summary and conclusion

Conclusions:

The flask method was applied for the determination of the water solubility of JNJ-150098-AAC (T001310).
The water solubility of the test item at 20°C was 401 g/L.
The pH of the aqueous samples was 1.6.