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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Adsorption / desorption

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
adsorption / desorption: screening
Type of information:
experimental study
Adequacy of study:
key study
Study period:
25.03.1992 - 06.01.1993
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 106 (Adsorption - Desorption Using a Batch Equilibrium Method)
GLP compliance:
yes
Type of method:
HPLC estimation method
Media:
soil
Specific details on test material used for the study:
Name: DMPPA_701-402-5
Batch No.: EN 746916/1991
Aggregate State: liquid
Colour: white
Radiolabelling:
no
Test temperature:
Room temperature
Details on study design: HPLC method:
Apparatus: Varian 9010 pump
Varian 9050 photometer
Varian 9095 sampling unit
Column: Lichrospher 100 RP 18 endcapped;
250 x 4 mm
Eluent: water/methanol (97 : 3)
Detection: UV/VIS, 200 nm
Temperature: room temperature
Injection Volume: 20 µL (measured range > 1.06 µg/ml)
200 µl (measured range > 0.29 µg/ml)
Flow: 1.0 ml/min
Details on matrix:
The stock solutions were prepared in the range from 263.0 µg/ml to 472.9 (µg/ml by dissolving DMPPA_701-402-5 in deion. water. Calculated volumes of this stock solution were diluted with deion. water to obtain standard solutions in the range from 0.29 µg/ml to 16.5 µg/ml DMPPA_701-402-5.
Duration:
16 h
Duration:
16 h
Type:
Koc
Value:
176 other: dm3/kg
Temp.:
25 °C
Type:
Koc
Value:
2 005 other: dm3/kg
Temp.:
25 °C
Type:
Koc
Value:
282 other: dm3/kg
Temp.:
25 °C
Validity criteria fulfilled:
yes
Conclusions:
DMPPA_701-402-5 show a weakly tendency to be adsorbed on sand (Koc = 176). Therefore, further desorption tests were minimal important. The obtained results for the desorption at loamy sand and sandy loam proof that less than 27 % of the total initially adsorbed amounts of DMPPA_701-402-5 were desorbed.
Executive summary:

Adsorption and desorption of DMPPA_701-402-5 were determined on three different soils, namely a sand (soil A, LUFA 2.1), a loamy sand (soil B, LUFA 2.2), and a sandy loam (soil C, LUFA 2.3) for a chosen test concentration of 4.06 mg/l.. The obtained results show that the amounts of DMPPA_701-402-5 adsorbed by the chosen soils ranged from 19 % (soil A) to 89 Z (soil B). The Freundlich adsorption constants and their corresponding kQ C-values obtained were estimated as follows

Soil type

Organic

carbon

Adsorption

(dm3/kg)

 

A: sand (LUFA 2.1)

B: loamy sand (LUFA 2.2)

C: sandy loam (LUFA 2.3)

 

0.70

2.29

1.34

 

176

2005

282

DMPPA_701-402-5 show a weakly tendency to be adsorbed on soil A. Therefore, further desorption tests were minimal important. The obtained results for the desorption at soil B and C prove that less than 27 % of the total initially adsorbed amounts of DMPPA_701-402-5 were desorbed.

Description of key information

The substance has a quite high organic carbon-water partitioning coefficient and is considered to have a weak tendency to be absorbed on soil.
The Koc values identified for different types of soil are:
A: sand (LUFA 2.1) : 176
B: loamy sand (LUFA 2.2): 2005  
C: sandy loam (LUFA 2.3): 282

Key value for chemical safety assessment

Koc at 20 °C:
176

Additional information