Registration Dossier

Administrative data

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Sept 17, 1999 to Nov 17, 1999
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Referenceopen allclose all

Reference Type:
study report
Title:
Unnamed
Year:
1999
Reference Type:
publication
Title:
Unnamed
Year:
2007

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EPA OPPTS 830.7860 (Water Solubility Generator Column Method)
Deviations:
no
GLP compliance:
yes
Type of method:
column elution method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
Test material was the commercial SAYTEX 8010 Flame Retardant product with a purity of 98.93% DBDPEthane.
Specific details on test material used for the study:
The test substance, a white powder, was identified as SAYTEX 8010; Lot # 23827-1K. The test substance had an assigned purity of 98.93% and an expiration date of March 2001.

Results and discussion

Water solubility
Key result
Water solubility:
ca. 0.72 µg/L
Conc. based on:
test mat. (dissolved fraction)
Loading of aqueous phase:
0.5 other: g
Incubation duration:
30 min
Temp.:
25 °C
pH:
0
Remarks on result:
other:
Remarks:
pH was not measured
Details on results:
The limit of detection (LOD) was determined to be 0.610 ug/L, calculated as the mean plus three times the standard deviation of background response of four matrix blank sample injections. The limit of quantitation (LOQ) was dtermined to be 0.896 ug/L calculated as the mean plus ten times the standard deviation of background response of four matrix blank injections. The temperature of the water bath remained constant at 25.0 +/- 0.05 degress C throughout the experiment.

Any other information on results incl. tables

The nominal flow rate of reagent water throught the generator column was measured prior to the start of sample collection for each flow rate and was found to be accurate for purposes of this study. The pump setting of 1.0 -ml/min yielded approximately 5.0 mL of eluant in a 5 minjute period of collection into a 10 mL graduated cylinder. The pump setting of 0.5 mL/min yielded approximately 2.5 mL of eulant in a 5 min period of collection into a 10 mL graduated cylinder. No interferences were observed at or above the LOQ in any of the injections of the matrix blank. The % recovery of the extraction efficiency samples fortified at 1.00, 5.00 and 10.0 ug SAYTEX 8010/L and extracted along with the generator column fractions, ranged from 82.1 to 92.4% of nominal. The saturated concentration of SAYTEX 8010 in the eluate samples collected from the generator column (0.635 ug/L) at a flow rate of 1.0 mL/min was between the LOQ and LOD. The saturated concentration at a flow rate of 0.5 mL/min was 0.795 ug/L. The overall solubility, calculated as the mean of estimated solubilites determined at the two flow rates, was estimated to be approximately 0.72 ug/L.

Applicant's summary and conclusion

Conclusions:
Interpretation of results (migrated information): insoluble (< 0.1 mg/L)
The overall solubility, calculated as the mean of estimated solubilites determined at the two flow rates, was approximately 0.72 ug/L and was between the LOD and LOQ. Thus, the substance is considered insoluble.
Executive summary:

The overall solubility, calculated as the mean of estimated solubilites determined at the two flow rates, was approximately 0.72 ug/L, and was between the LOD and LOQ. Thus, the substance is considered insoluble (<0.1 mg/L).