Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Other distribution data

Currently viewing:

Administrative data

Endpoint:
other distribution data
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Published study

Data source

Reference
Reference Type:
secondary source
Title:
Rate of loss of ammonia from water to the atmosphere
Author:
Weiler, R.R.
Year:
1979
Bibliographic source:
J. Fish Res. Board Can. 36:685-689

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
The rate of loss of ammonia from water to the atmosphere was determined in field experiments
GLP compliance:
not specified
Type of study:
other: The rate of loss of ammonia from water to the atmosphere was determined in field experiments
Media:
water - air

Test material

Constituent 1
Chemical structure
Reference substance name:
Ammonia, anhydrous
EC Number:
231-635-3
EC Name:
Ammonia, anhydrous
Cas Number:
7664-41-7
Molecular formula:
H3N
IUPAC Name:
ammonia
Details on test material:
Ammonia

Results and discussion

Any other information on results incl. tables

Kewas found to be a linear function of wind speed and temperature. Field results were more variable than the wind tunnel studies.

Exchange: 47.3 cm/h at 24.2-25.0°C; 25.6 cm/h at 22.1-23.0°C; 49.0 cm/h at 17.5-19.0°C; 37.2 cm/h at 15.2-17.0°C.

The exchange coefficient (Ke) is a measure of the total resistance to ammonia transfer expressed on a liquid phase basis. It is likely that ammonia transfer from water to air is controlled by gas phase resistance.

Applicant's summary and conclusion

Conclusions:
Exchange: 47.3 cm/h at 24.2-25.0°C; 25.6 cm/h at 22.1-23.0°C; 49.0 cm/h at 17.5-19.0°C; 37.2 cm/h at 15.2-17.0°C.
Executive summary:

Kewas found to be a linear function of wind speed and temperature. Field results were more variable than the wind tunnel studies.

Exchange: 47.3 cm/h at 24.2-25.0°C; 25.6 cm/h at 22.1-23.0°C; 49.0 cm/h at 17.5-19.0°C; 37.2 cm/h at 15.2-17.0°C.

The exchange coefficient (Ke) is a measure of the total resistance to ammonia transfer expressed on a liquid phase basis. It is likely that ammonia transfer from water to air is controlled by gas phase resistance.