Tetraoctylammonium bromide

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

Experimental test result performed using standard OECD test guidelines.

Qualifier:

according to guideline

Guideline:

other: as mentioned below

Principles of method if other than guideline:

The water solubility determination of Tetraoctylammonium bromide (CAS No. 14866-33-2) was done as per the OECD guideline 105 by spectrophotometric analytical method as per OECD 101.

GLP compliance:

not specified

Type of method:

other: Spectrophotometric method

Specific details on test material used for the study:

- Name of the test material: Tetraoctylammonium bromide
- IUPAC name: Tetraoctylammonium bromide
- Molecular formula: C32H68NBr
- Molecular weight: 546.8002 g/mol
- Smiles: CCCCCCCC[N+](CCCCCCCC)(CCCCCCCC)CCCCCCCC.[Br-]
- Inchi : 1S/C32H68N.BrH/c1-5-9-13-17-21-25-29-33(30-26-22-18-14-10-6-2,31-27-23-19-15-11-7-3)32-28-24-20-16-12-8-4;/h5-32H2,1-4H3;1H/q+1;/p-1
- Substance type: Organic
- Physical form : Solid powder (off white)

Key result

Water solubility:

28.984 mg/L

Conc. based on:

test mat.

Temp.:

30 °C

Remarks on result:

other: no other details mentioned

WATER SOLUBILITY: PRELIMINARY TEST

0.1g of test item was taken in 100 ml beaker. DI water was added in increasing amount in sequence of 0.1 ml, 0.5 ml, 1.0 ml,

2.0 ml, 10.0 ml and 100.0 ml with intermediate stirring.

For poorly soluble substances: Preliminary water solubility of test item was found 0.1g in > 100 ml DI water. For analytical

determination 0.1 g of test item was dissolved in 100 ml of DI water. The solution was kept for 24 hrs on stirring and absorbance was recorded. Concentration detected on the basis of standard curve was 32.5521 mg/L. Five times the concentration recorded from preliminary solubility was used for confirmatory study.

WATER SOLUBILITY: CONFIRMATORY TEST

Five times the concentration recorded from preliminary solubility = 32.5521 mg/L × 5 = 162.76 mg/L was used for confirmatory

study. Two separate solution of 16.276 mg in 100 ml DI water were prepared and kept for stirring for 48 hrs and 72 hrs. After

the completion of stirring period the absorbance for all the two solution were recorded and concentration was detected on the

basis of standard curve. Table 2 refers to the same.

Sample stirring	Concentration obtained on the basis of standard curve	Dilution factor	Solubility value obtained (mg/L)
24 hour	-	-	-
48 hour	28.914 mg/L	-	28.914 mg/L
72 hour	29.055 mg/L	-	29.055 mg/L

Considering the water solubility for 48 hrs and 72 hrs the mean water solubility was calculated as follows:

Mean water solubility value for 48 hour run sample + 72 hour run sample

=(28.914+29.055)/2

=28.984 mg/L

Conclusions:

The solubility of Tetraoctylammonium bromide (14866-33-2 ) in water was determined to be 28.984 mg/L at 30°C.

Executive summary:

The water solubility determination of Tetraoctylammonium bromide (CAS No. 14866-33-2) was done as per the OECD guideline 105 by spectrophotometric analytical method as per OECD 101. The solubility of Tetraoctylammonium bromide (14866-33-2 ) in water was determined to be 28.984 mg/L at 30°C.

Hence the substance Tetraoctylammonium bromide was considered to be slightly soluble in water.

Description of key information

The solubility of Tetraoctylammonium bromide (14866-33-2 ) in water was determined to be 28.984 mg/L at 30°C.

Key value for chemical safety assessment

Water solubility:

28.984 mg/L

at the temperature of:

30 °C

Additional information

The water solubility determination of Tetraoctylammonium bromide (CAS No. 14866-33-2) was done as per the OECD guideline 105 by spectrophotometric analytical method as per OECD 101. The solubility of Tetraoctylammonium bromide (14866-33-2 ) in water was determined to be 28.984 mg/L at 30°C. Hence the substance Tetraoctylammonium bromide was considered to be slightly soluble in water.