Acrylaldehyde

Other distribution data

Administrative data

Endpoint:

other distribution data

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: study documented in sufficient details

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1970

Materials and methods

Principles of method if other than guideline:

Acrolein was injected into an irrigation canal for a continuous period and the concentration of the test compound in the air above the water surface was measured using GC/UV.

GLP compliance:

no

Type of study:

volatility

Media:

water - air

Test material

Test material information

Constituent 1

Reference substance name:

Acrylaldehyde

EC Number:

203-453-4

EC Name:

Acrylaldehyde

Cas Number:

107-02-8

Molecular formula:

C3H4O

IUPAC Name:

acrylaldehyde

Results and discussion

Any other information on results incl. tables

Acrolein (ca. 0.7 ppm) was injected into an irrigation canal (10 -11°C during the day, 6°C during the night; flow velocity: 1.7 ft/sec) for a continuous period (6 h, 20 min) and the concentration of the test compound in the air above the water surface was measured at four sites (1, 3, 6, and 9.5 miles below point of application) using GC/UV. For this, a small, steady stream of air was drawn for two hours through volatilimeters across an enclosed water surface of known area, and bubbled through a solution containing 2,4 -DNPH-hydrazine.

The following results were obtained:

Acrolein losses by volatilization from canal surfaces

Distance below injection point (mile(s))

Acrolein volatilised per surface mile of canal (mg/h)

Percent of acrolein volatilised per mile

1 mile	27.0 mg/h	0.31%
3 mile	20.7 mg/h	0.35%
6 mile	15.2 mg/h	0.17%
9.5 mile	11.5 mg/h	0.13%

Acrolein residual solution concentrations and calculated losses from point of application

Miles below injection point	Acrolein concentration (ppm)*	Acrolein loss per mile %	Acrolein losses summation %
1	0.710	1.4	1.4
3	0.691	1.3	4.0
6	0.590	4.7	18.1
9.5	0.404	7.4	43.9
12.5	0.361	2.0	49.9
16.0	0.340	0.8	52.8
19.0	0.329	0.5	54.3
22.5	0.319	0.4	55.7
27.0	0.269	1.5	62.6

*average of three samples taken 1, 3, and 5 h after acrolein front reached sampling station

Based on the results of water and air concentration measurements (only small losses due to volatilization), the authors concluded that reaction of acrolein with suspended or sedimented particulates might be of considerable importance.

Applicant's summary and conclusion

Conclusions:

Acrolein (ca. 0.7 ppm) was injected into an irrigation canal (10 -11°C during the day, 6°C during the night; flow velocity: 1.7 ft/sec) for a continuous period (6 h, 20 min) and the concentration of the test compound in the air above the water surface was measured at four sites (1, 3, 6, and 9.5 miles below point of application) using GC/UV. For this, a small, steady stream of air was drawn for two hours through volatilimeters across an enclosed water surface of known area, and bubbled through a solution containing 2,4 -DNPH-hydrazine. Based on the results of water and air concentration measurements (only small losses due to volatilization: 0.13-0.35% of applied acrolein), the authors concluded that reaction of acrolein with suspended or sedimented particulates might be of considerable importance.

Executive summary:

Acrolein (ca. 0.7 ppm) was injected into an irrigation canal (10 -11°C during the day, 6°C during the night; flow velocity: 1.7 ft/sec) for a continuous period (6 h, 20 min) and the concentration of the test compound in the air above the water surface was measured at four sites (1, 3, 6, and 9.5 miles below point of application) using GC/UV. For this, a small, steady stream of air was drawn for two hours through volatilimeters across an enclosed water surface of known area, and bubbled through a solution containing 2,4 -DNPH-hydrazine.

The following results were obtained:

Acrolein losses by volatilization from canal surfaces

Distance below injection point (mile(s))	Acrolein volatilised per surface mile of canal (mg/h)	Percent of acrolein volatilised per mile
1	27.0	0.31
3	20.7	0.35
6	15.2	0.17
9.5	11.5	0.13

Acrolein residual solution concentrations and calculated losses from point of application

Miles below injection point	Acrolein concentration (ppm)*	Acrolein loss per mile %	Acrolein losses summation %
1	0.710	1.4	1.4
3	0.691	1.3	4.0
6	0.590	4.7	18.1
9.5	0.404	7.4	43.9
12.5	0.361	2.0	49.9
16.0	0.340	0.8	52.8
19.0	0.329	0.5	54.3
22.5	0.319	0.4	55.7
27.0	0.269	1.5	62.6

*average of three samples taken 1, 3, and 5 h after acrolein front reached sampling station

Based on the results of water and air concentration measurements (only small losses due to volatilization), the authors concluded that reaction of acrolein with suspended or sedimented particulates might be of considerable importance