Registration Dossier

Administrative data

Endpoint:
adsorption / desorption: screening
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2013
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Method may not be optimal for organic pigments with very low solubility in both water and solvents

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 121 (Estimation of the Adsorption Coefficient (Koc) on Soil and on Sewage Sludge using High Performance Liquid Chromatography (HPLC))
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
HPLC estimation method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder
Details on test material:
Purity: 98.9%
Radiolabelling:
no

Study design

Batch equilibrium or other method

Analytical monitoring:
yes

Results and discussion

Adsorption coefficient
Type:
log Koc
Value:
> 5.63
Temp.:
30 °C

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
This value indicates that the test item is environmentally immobile.
Executive summary:

The adsorption coefficient of Pigment Red 3 has been determined to be greater than 4.27 x 105, log10 Koc >5.63, using the HPLC screening method, designed to be compatible with Method 121 of the OECD Guidelines for Testing of Chemicals, 22 January 2001 and Method C19 Adsorption Coefficient of Commission Regulation (EC) No 440/2008 (as amended) of 30 May 2008. This

value indicates that the test item is environmentally immobile.