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Physical & Chemical properties

Auto flammability

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Administrative data

Endpoint:
auto-flammability
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2015
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Auto-flammability test performed based on national standard VDI2263-1/Clariant internal method

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015
Report date:
2015

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: VDI- Richtlinie 2263-1 (national standard)
Principles of method if other than guideline:
Testing in Grewer oven (small wire cage with a volume of 8 ccm)
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
3-methyl-1-p-tolyl-5-pyrazolone
EC Number:
201-708-4
EC Name:
3-methyl-1-p-tolyl-5-pyrazolone
Cas Number:
86-92-0
Molecular formula:
C11H12N2O
IUPAC Name:
5-methyl-2-(4-methylphenyl)-1,2-dihydro-3H-pyrazol-3-one

Results and discussion

Auto-ignition temperature (liquids / gases)open allclose all
Auto-ignition temperature:
°C
Atm. press.:
ca. 1 atm
Remarks on result:
other: No self-heating of the pure product was detected up to the final temperature of 440 °C. In the temperature range 120 – 170 °C an endothermal effect was observed. After the test the mesh wire basket of the pure product was empty.
Auto-ignition temperature:
>= 160 °C
Atm. press.:
ca. 1 atm
Remarks on result:
other: A self-heating of the substance - diatomite mixture (1:1) was detected at 160 °C. A multistage reaction was observed which led to a maximum product temperature of more than 450 °C. In the temperature range 120 – 160 °C an endothermal effect was observed.
Relative self-ignition temperature (solids)open allclose all
Relative self-ignition temperature:
°C
Remarks on result:
other: No self-heating of the pure product was detected up to the final temperature of 440 °C. In the temperature range 120 – 170 °C an endothermal effect was observed. After the test the mesh wire basket of the pure product was empty.
Remarks:
at atm. press. of ca.1.0 atm
Relative self-ignition temperature:
>= 160 °C
Remarks on result:
other: A self-heating of the substance - diatomite mixture (1:1) was detected at 160 °C. A multistage reaction was observed which led to a maximum product temperature of more than 450 °C. In the temperature range 120 – 160 °C an endothermal effect was observed.
Remarks:
at atm. press. of ca.1.0 atm

Applicant's summary and conclusion

Conclusions:
Due to it's auto flammability properties (no self heating below melting point) the tested substance 3-Methyl-1-p-tolyl-5-pyrazolone has not to be classified as self-heating substance according to EC 1272/2008 (CLP Regulation).

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