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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2002
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
according to VDI 2263 and UN N.4, but limited documentation

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2002
Report date:
2002

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
other: UN N.4
Qualifier:
equivalent or similar to guideline
Guideline:
other: Directive VDI 2263, part 1

Test material

Constituent 1
Chemical structure
Reference substance name:
4,4'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[2,4-dihydro-5-methyl-2-(p-tolyl)-3H-pyrazol-3-one]
EC Number:
239-898-6
EC Name:
4,4'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[2,4-dihydro-5-methyl-2-(p-tolyl)-3H-pyrazol-3-one]
Cas Number:
15793-73-4
Molecular formula:
C34H28Cl2N8O2
IUPAC Name:
4,4'-[(3,3'-dichlorobiphenyl-4,4'-diyl)didiazene-2,1-diyl]bis[5-methyl-2-(4-methylphenyl)-2,4-dihydro-3H-pyrazol-3-one]
Test material form:
solid: nanoform

Results and discussion

Relative self-ignition temperature (solids)
Relative self-ignition temperature:
>= 250 °C
Remarks on result:
other:
Remarks:
onset temperature in the simulated Grewer oven

Any other information on results incl. tables

1. Self-ignition screening by Grewer simulation using RADEX Air Streaming:

Gradual temperature rise from ca. 250 °C, sharp onset at ca. 300°C, temperature rise up to ca. 370°C

2. Hot storage test according to UN N.4: no self-heating recorded during the 24 hour test

Temperature rise < 1 °C

Applicant's summary and conclusion

Conclusions:
The test item is not self-heating substance according to Regulation (EC) No 1272/2008.