Ethylene

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

not specifed

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: GLP status not known, non-guideline, acceptable with restrictions

Justification for type of information:

N/A

Principles of method if other than guideline:

Ethylene at one atmosphere was added to a glass equilibraton bottle filled with distilled water by displacing water until the volume of the aqueous phase was 3/4 of the volume of the bottle. The gas was maintained over the water. A rubber balloon in the line from the gas cylinder to the bottle served as a resevoir and was remained in-line until the aqueous phase was sampled. The 3/4 full bottle was shaken for 5 to 10 minutes and then allowed to stand at least 30 minutes prior to analysis. Aqueous samples were taken using a Hamilton syringe and transferred to the gas chromatograph (GC).

Analysis was by gas chromatograph (GC) with a hydrogen-flame ionization detecter (Beckman). The chromatographic column was 12 ft. x 0.25 in., stainless steel tubing packed with 25% SE 30 gum rubber on 30-60 mesh firebrick. Helium flow through the column was 65cc/min.

Aqueous phase concentrations of propylene were determined against a standard curve prepared from the gas sample used in the aqueous equilibration procedure

GLP compliance:

no

Remarks:

predates inplemation of GLP

Type of method:

other: gas liquid chromatography

Specific details on test material used for the study:

not specified

Key result

Water solubility:

131 mg/L

Temp.:

25 °C

pH:

7

Details on results:

No further details provided

N/A

Conclusions:

Interpretation of results : moderately soluble (100-1000 mg/L)
The solubility of ethylene in water is 131 mg/L at 25˚C

Executive summary:

The solubility of ethylene in water is 131 mg/L at 25˚C.The study predates the implementation of GLP and standard guidelines. The method is described in detail and is considered appropriate for determining the solubility of a gaseous substance.

Description of key information

The solubility of ethylene in water is 131 mg/L at 25˚C

Key value for chemical safety assessment

Water solubility:

131 mg/L

at the temperature of:

25 °C

Additional information

The study by McAuliffe (1966) predates the implementation of GLP and standard guidelines. The method is described in detail and is considered appropriate for determining the solubility of a gaseous substance. The supporting study, Merck Handbook (O'Neil 2006) is a peer reviewed handbook and reports a value of 11 vol % at 25 ˚C and states the substance is moderately soluble.