Registration Dossier

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: 1a GLP guidance study (EC)
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to other study
Guideline:
EU Method A.10 (Flammability (Solids))
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Test procedure:
burning time (test type not further specified)
Remarks:
or specified in description of method (migrated information)
Burning time:
ca. 79 s
Remarks on result:
other: The shortest burning time was 79 s
Test procedure:
ignition time on contact with air
Remarks:
Ignition on contact with air refers to either Pyrophoric solids or Pyrophoric liquids depending on physical state (migrated information).
Remarks on result:
ignition on contact with air (not further specified)
Remarks:
corresponding to 'yes' in migrated source record.
Test procedure:
ignition time on contact with air
Remarks:
Ignition on contact with air refers to either Pyrophoric solids or Pyrophoric liquids depending on physical state (migrated information).
Remarks on result:
ignition on contact with air (not further specified)
Remarks:
corresponding to 'yes' in migrated source record.

Preliminary test:

Experimental conditions

Humidity about 48%

Room temperature about 19 °C

Assay

The test item ignited and the propagation of the flame was observed on 200 mm in 3 min 15 s..

Main test:

The test item melted and became a colorless limpid liquid which blackened quickly and ignited.

Shortest burning time 79 s

Interpretation of results:
non flammable
Remarks:
Migrated information
Conclusions:
The flammability of 1,3-diphenyl-2-thiourea (DPTU) was performed in a study performed in accordance with EC regulation 440/2008 EC A 10 method.
The 1,3-diphenyl-2-thiourea (DPTU) was not considered as highly flammable under our experimental conditions.
Executive summary:

A preliminary test was performed, with one assay. The test item ignited and the propagation of the flame was observed on 200 mm in 3 min 15 s.

Then a main test was performed. The test item melted and became a colorless limpid liquid which blackened quickly and ignited.The shortest burning test observed was 79s.

The test item was not considered as highly flammable under our experimental conditions.

Description of key information

The flammability of 1,3-diphenyl-2-thiourea (DPTU)  was performed in a study performed in accordance with EC regulation 440/2008 EC A 10 method. The shortest burning time observed was 79s.
The 1,3-diphenyl-2-thiourea (DPTU) was not considered as highly flammable under our experimental conditions.

Key value for chemical safety assessment

Flammability:
non flammable

Additional information

The flammability of 1,3-diphenyl-2-thiourea (DPTU) was performed in a study performed in accordance with EC regulation 440/2008 EC A 10 method.

The 1,3-diphenyl-2-thiourea (DPTU) was not considered as highly flammable under our experimental conditions.

Justification for classification or non-classification

The flammability of DPTU was performed in accordance with EC regulation 440/2008 EC A 10 method. A preliminary test and a main test were performed. DPTU was not considered as highly flammable under our experimental conditions.