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Physical & Chemical properties

Oxidising properties

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Administrative data

Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study has been performed according to EC guidelines and according to GLP principles.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2007
Report Date:
2007

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: European Economy Community (EEC), EEC-Directive 92/69 EEC, Part A, Methods for the Determination of Physico-Chemical properties, A.17: "Oxidizing Properties (solids)", EEC Publication No. L383, December 1992.
Deviations:
no
GLP compliance:
yes (incl. certificate)

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): TC4ASO2
- Substance type: multi-constituent
- Physical state: white powder
- Analytical purity: 97.8%
- Composition of test material, percentage of components: 92.9% 4-tert-Butylsulfonylcalix(4)arene (CAS 204190-49-8)
4.9% 4-tert-Butylsulfonylcalix(8)arene
- Lot/batch No.: AYUI-1Y
- Expiration date of the lot/batch: 07 October 2007
- Stability under storage conditions: Stable
- Storage condition of test material: At room temperature in the dark

Study design

Contact with:
powdered cellulose

Results and discussion

Test results (Oxidising solids)open allclose all
Sample tested:
test mixture (not specified)
Remarks:
migrated information
Parameter:
maximum burning rate
Result:
0.84 other: mm/s (migrated information)
Remarks on result:
other: Test in air atmosphere; suspected to be false positive.
Sample tested:
reference mixture (not specified)
Remarks:
migrated information
Parameter:
maximum burning rate
Result:
0.8 other: mm/s (migrated information)
Remarks on result:
other: Test in air atmosphere

Any other information on results incl. tables

In an air atmosphere, the maximum burning rate was measured for the 10/90 (w/w) test substance/cellulose mixture: 0.84
mm/s. This is slightly higher than the maximum burning rate for the reference substance (0.80 mm/s). Because this result
was suspected to be false positive, additional tests were performed.

Test in inert atmosphere

An attempt was made to ignite the 70/30 (w/w) barium nitrate/cellulose pile using an electronic ignition source in a nitrogen atmosphere (oxygen content < 2%). Since the pile could not be ignited under these conditions, the test was repeated under an atmosphere containing approximately 10% oxygen (the atmosphere was generated by using a 1:1 mixture of air and pure nitrogen). The pile could not be ignited under these conditions. Thereafter, the oxygen content was increased until the pile ignited. The pile burned for about 5 seconds with a yellow/green flame and emitted sparks. Grey smoke was observed after the flame extinguished.

 

The test substance/cellulose mixture (10/90 (w/w)) could not be ignited using an electronic ignition source in a nitrogen atmosphere and in an atmosphere containing approximately 10% oxygen. The pile could neither be ignited when the oxygen content was increased to a value at which the 70/30 (w/w) barium nitrate/cellulose mixture was capable to cause a burning reaction. Based on this, it was concluded that the test substance has no oxidizing properties. 

 

Applicant's summary and conclusion

Interpretation of results:
other: no oxidising properties
Remarks:
Migrated information
Conclusions:
Based on the results of both tests and on the difference in burning behaviour, it was concluded that TC4ASO2 has no oxidizing properties in the sense that it cannot sustain a reaction with cellulose at a burning rate higher than that of a reference mixture or stimulate combustion of cellulose through a mechanism as found characteristic for substances having oxidizing properties.