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Reference
Endpoint:
oxidising solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
October 1992- January 1993
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.17 (Oxidising Properties (Solids))
Deviations:
no
GLP compliance:
yes
Contact with:
powdered cellulose
Sample tested:
test mixture (not specified)
Parameter:
maximum burning rate
Result:
0.59 other: mm/s
Sample tested:
other: not specified maximum burning rate of cellulose only
Parameter:
other: maximum burning rate of cellulose only
Result:
0.8 other: mm/s
Remarks on result:
other: (sigmacell 50)
Sample tested:
reference mixture (not specified)
Parameter:
maximum burning rate
Result:
0.8 other: mm/s
Remarks on result:
other: cellulose/barium nitrate 40:60

Preliminary test:

The test mixture was prepared by mixing 1,3-bis(3-methyl-2,5-dioxo-1H-pyrrolinylmethyl)benzene thoroughly with dried cellulose in the proportions 2 of 1,3-bis(3-methyl-2,5-dioxo-1H-pyrrolinylmethyl)benzene to 1 of cellulose by weight.

A plugged 35 mm glass funnel was filled with the test mixture and inverted onto an asbestos board.

An attempt was made to ignite the pile with a gas burner resulting in a burn time of 3 mins 56.8 sec. A pile of 3:2 barium nitrate: cellulose mixture of equal dimensions took 1 min 45.8 secs to burn.

Main test:

Test mixtures were prepared by mixing 1,3-bis(3-methyl-2,5-dioxo-1H-pyrrolinylmethyl)benzene in different proportions (10 % - 90 % of 1,3-bis(3-methyl-2,5-dioxo-1H-pyrrolinylmethyl)benzene) with dried cellulose powder by weight. A barium nitrate reference mixture was prepared in the proportions 3 of barium nitrate to 2 of cellulose by weight. The test mixtures were then formed into olles 250 mm long and attempts made to ignite one end. After ignition, the first 30 mm of each pile was allowed to burn and the time (in seconds) recorded for the next 200 mm to burn.

Results:

 Ratios/cellulose -1,3-bis(3-methyl-2,5-dioxo-1H-pyrrolinylmethyl)benzene  Burn times  Burning rate
  (sec)   (mm/sec)
10:90   melted/ no burn  
 20:80  melted/no burn  
 30:70  1006  0.20
 40:60  472  0.42
 50:50  455  0.44
 60:40  432  0.46
 70:30  397  0.50
 80:20  423  0.47
 90:10  330  0.61
 cellulose only (sigmacell 50)  359  0.56
 cellulose + barium nitrate (40:60)  250  0.80

 % substance by weight

                   Time taken for 200 mm to burn/seconds  
   A  B  C  D  E  F  Mean  rate/mm/second
30   365  390  364  367  401  397  381  0.52
 20  405  410  410  395  400  423  407  0.49
 10  310  351  355  338  358  330  340  0.59

Interpretation of results:
GHS criteria not met
Conclusions:
No oxidising properties was determined for 1,3-bis(3-methyl-2,5-dioxo-1H-pyrrolinylmethyl)benzene.
Executive summary:

The determination of oxidsing properties was determined according to EU method A.17.

Test mixtures were prepared by mixing 1,3-bis(3-methyl-2,5-dioxo-1H-pyrrolinylmethyl)benzene in different proportions (10 % - 90 % of 1,3-bis(3-methyl-2,5-dioxo-1H-pyrrolinylmethyl)benzene) with dried cellulose powder by weight. A barium nitrate reference mixture was prepared in the proportions 3 of barium nitrate to 2 of cellulose by weight. The test mixtures were then formed into olles 250 mm long and attempts made to ignite one end. After ignition, the first 30 mm of each pile was allowed to burn and the time (in seconds) recorded for the next 200 mm to burn.

1,3-bis(3-methyl-2,5-dioxo-1H-pyrrolinylmethyl)benzene is non oxidising.

Description of key information

No oxidising properties were determined for

1,3-bis(3-methyl-2,5-dioxo-1H-pyrrolinylmethyl)benzene.

Key value for chemical safety assessment

Oxidising properties:
no

Additional information

Justification for classification or non-classification

1,3-bis(3-methyl-2,5-dioxo-1H-pyrrolinylmethyl)benzene has no oxidising properties and hence no classification according to both Directive 67/548/EEC and GHS (Regulation EC 1272/2008) is required.