Registration Dossier

Diss Factsheets

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
05 Jul 2018 - 15 Oct 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)
Qualifier:
according to guideline
Guideline:
EU Method A.10 (Flammability (Solids))
GLP compliance:
yes
Specific details on test material used for the study:
Name p-phenylene diisocyanate
Batch no. 170329 (test item 1), 171206 (test item 2)
Appearance solid white flakes
Composition p-phenylene diisocyanate
CAS No. 104-49-4
EINECS-No. 203-207-6
Molecular formula C8H4N2O2
Molecular weight 160.13 g/mol
Purity > 99%
Homogeneity Homogeneous
Vapour pressure < 1 hPa at 20 °C
Stability in solvents: not stated
Solubility in solvents: not stated
Expiry date 28. Mar. 2018 (test item1), 02. Dec. 2018 (test item 2)
Storage Room Temperature: (20 ± 5 °C), keep away from humidity.
Key result
Test procedure:
burning rate test: preliminary screening test
Burning time:
3.75 min
Remarks on result:
other: The test item burned with an orange, soothing and sparkling flame. The combustion with flame of the test item propagated the 200 mm within 3 min and 44.91sec.
Key result
Test procedure:
burning rate test over 100 mm length
Remarks:
Exp 1
Burning time:
3.6 min
Remarks on result:
other: 3min 37 s
Key result
Test procedure:
burning rate test over 100 mm length
Remarks:
Exp 2
Burning time:
1.9 min
Remarks on result:
other: 1min 52s
Key result
Test procedure:
burning rate test over 100 mm length
Remarks:
Exp 3
Burning time:
2.75 min
Remarks on result:
other:
Remarks:
2min 45s
Key result
Test procedure:
burning rate test over 100 mm length
Remarks:
Exp 4
Burning time:
3.25 min
Remarks on result:
other: 3min 15s
Key result
Test procedure:
burning rate test over 100 mm length
Remarks:
Exp 5
Burning time:
2.5 min
Remarks on result:
other: 2min 33s
Key result
Test procedure:
burning rate test over 100 mm length
Burning time:
3.5 min
Remarks on result:
other: 3min 30s

First, a safety test was performed. A small amount of the test item was heated on a magnesia groove with a gas burner in order to derive safety precautions. The test item burned with soothing flame. A black light residue was observed.

Determination of burning rate.

Six experiments were performed. The data are given in the table below.

Performing

Time

1

3 min 37.34 sec.

2

1 min 52.56 sec.

3

2 min 45.28 sec

4

3 min 14.76 sec.

5

2 min 33.19 sec.

6

3 min 29.78 sec.

 

Interpretation of results:
not classified based on GHS criteria
Conclusions:
P-phenylene diisocyanate should be considered as not highly flammable (for EU regulations) and as non-flammable solid (for UN regulations)
Executive summary:

In the preliminary screening test following the EU and UN method, the test item was heated with the flame of a teclu burner.When ignited with the flame of a teclu burner, thetest item started to burn. After approximate 1 min the flame reached the marker. The test item burned with an orange, soothing and sparkling flame. The combustion with flame of the test item propagated the 200 mm within 3 min and 44.91sec.

Therefore, a burning rate for EU-regulations were performed. Six experiments were conducted.The burning rate showed the combustions propagated the 100 mm between 1 min 52.56 sec and 3 min 37.34 sec. The shortest burning time being more than 45 seconds. Therefore, the test itemp-phenylene diisocyanateshould be considered as not highly flammable (for EU regulations) and as non-flammable solid (for UN regulations).

Description of key information

p-phenylene diisocyanate (EC A.10): non-flammable

Key value for chemical safety assessment

Flammability:
not classified

Additional information

In the preliminary screening test following the EU and UN method, the test item was heated with the flame of a teclu burner.When ignited with the flame of a teclu burner, thetest item started to burn. After approximate 1 min the flame reached the marker. The test item burned with an orange, soothing and sparkling flame. The combustion with flame of the test item propagated the 200 mm within 3 min and 44.91sec.

Therefore, a burning rate for EU-regulations were performed. Six experiments were conducted.The burning rate showed the combustions propagated the 100 mm between 1 min 52.56 sec and 3 min 37.34 sec. The shortest burning time being more than 45 seconds. Therefore, the test itemp-phenylene diisocyanateshould be considered as not highly flammable (for EU regulations) and as non-flammable solid (for UN regulations).

Justification for classification or non-classification

Based on the key study result no classification is warranted for p-phenylene diisocyanate according to the criteria of CLP regulation 1272/2008.