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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study
Principles of method if other than guideline:
For sorption and desorption, each NAC (nitroaromatic compound) was extracted from the soil using acetonitrile, as described in EPA SW-846 Method 8330. NAC concentrations were determined by reversed-phase HPLC-PDA. LC/MS was used to to identify and verify TNT metabolites.
GLP compliance:
not specified
Type of method:
other: natural and model sterile and nonsterile soils using the methods of Huang et al. (20)
Media:
soil
Radiolabelling:
no
Test temperature:
25C
Sample No.:
#1
Duration:
22 h
Initial conc. measured:
ca. 5 other: mg/L
pH:
5.5
Temp.:
25 °C
Sample No.:
#2
Duration:
22 h
Initial conc. measured:
ca. 10 other: mg/L
pH:
5.5
Temp.:
25 °C
Sample No.:
#3
Duration:
22 h
Initial conc. measured:
ca. 15 other: mg/L
pH:
5.5
Temp.:
25 °C
Sample No.:
#4
Duration:
22 h
Initial conc. measured:
ca. 30 other: mg/L
pH:
5.5
Temp.:
25 °C
Sample No.:
#5
Duration:
22 h
Initial conc. measured:
ca. 50 other: mg/L
pH:
5.5
Temp.:
25 °C
Sample no.:
#1
Duration:
44 h
pH:
5.5
Temp.:
25 °C
Key result
Type:
Kd
Value:
ca. 6.38
Temp.:
25 °C
Remarks on result:
other: sorption by topsoil
Type:
Kd
Value:
ca. 223.63
Temp.:
25 °C
Remarks on result:
other: sorption by illite
Type:
Kd
Value:
ca. 12.01
Temp.:
25 °C
Remarks on result:
other: desorption from topsoil
Type:
Kd
Value:
ca. 265.98
Temp.:
25 °C
Remarks on result:
other: desorption from illite
Conclusions:
This study illustrated that soil and NAC type will have a significant effect on the Kd as well as the formation of acetylated metabolites.

Description of key information

According to method C.19 Koc = Pow which is available in section 4.7 (partition coefficient).


Other adsorption coefficient indicated as dimensionless:
- other: Kd ,6.38 at the temperature 25.0°C

[LogKoc: 1.65]

Key value for chemical safety assessment

Koc at 20 °C:
44.29

Additional information