N-(5-chloro-2-methoxyphenyl)-3-hydroxy-4-[[2-methoxy-5-[(phenylamino)carbonyl]phenyl]azo]naphthalene-2-carboxamide

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2001

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Principles of method if other than guideline:

Grewer oven screening and hot storage test

Relative self-ignition temperature:

ca. 220 °C

Remarks on result:

other:

Remarks:

at atm. press. of ca.1013.0 hPa

Self-heating of the test item was observed starting from 220 °C (max. temp. ca. 340 °C).

The hot storage test at a temperature of 190 °C caused warming of the sample by 9 K within 108 min after temperature equalisation (which took 3.7 h). Afterwards the sample temperature fell back to the oven temperature. There was no other reaction. A total weight loss of 2.1 weight-% was observed over the storage time of 65 h.

While processing the test substance, a temperature of 190 °C should not be exceeded. A safety margin of 10 K is recommended. Larger bulks of the substance might show self-heating at lower temperatures. Therefore the substance should not be stored at a temperature above 90 °C.

Description of key information

Self-heating of the test substance was determined by Grewer oven screening and hot storage test (1 L wire mesh basket) at 190 °C.

Heating a sample in the Grewer oven up to 400 °C revealed self-heating of the test item starting at 220 °C. The hot storage test at a temperature of 190 °C caused warming of the sample by 9 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

220 °C

Additional information

No classification according to transport regulations required.