Registration Dossier

Administrative data

Endpoint:
monitoring data
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: acceptable, well documented study which meets basic scientific principles

Data source

Reference
Title:
No information
Author:
Edgerton S.A., Kenny D.V., Joseph D.W., Determination of|amines in indoor air from steam humidification, Environ.|Sci. Technol., 23 (4), 484-488, 1989

Materials and methods

Type of measurement:
other: other

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Any other information on results incl. tables

RS-Freetext:
- The concentration of DEAE (detection limit: 0.1 ppb)
measured in indoor room air during normal operation of the
boiler and humidification systems remained very low compared
with any established health standards and did not present
any hazard to health.
- The average room concentration of DEAE at the average of
42 % relative humidity was about 0.6 ppb (approx. 2.9*10-³
mg/m³).
- At 61 % relative humidity, the average DEAE-concentration
was 2.4 ppb (approx. 0.01 mg/m³).
- During the final hour of the monitoring period when the
humidifier was shut off, the concentration decayed to ~50 %
of the steady-state value at 61 % relative humidity.
- When the humidifier was opened all the way at the end of
the study, the concentration of the DEAE increased up to 8.2
ppb (approx. 0.034 mg/m³), the highest value recorded.
- At 61 % relative humidity, the removal rate was 14 µg/s
for DEAE.
- The primary fate of the amine that was introduced into
room air through steam humidification appears to be removal
to surfaces.

Applicant's summary and conclusion