Dipotassium 3,4,5,6-tetrabromophthalate

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

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

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

Qualifier:

no guideline followed

Principles of method if other than guideline:

Thermal behaviour testing by DSC and TGA

GLP compliance:

no

Specific details on test material used for the study:

Dried material, 98% purity
Batch LP081119

Relative self-ignition temperature:

> 400 °C

The sample appears to decompose with weight loss from 286 C and although there was an apparent exotherm at over 400 C with an energy of 271.4J/g., it is likely that this relates to melting of a decomposition product.  After heating to 500 C, there was no visible remains of the substance.

In the thermogravimetric assay, weight loss started ay ca 280 C and a steady weight loss continued until the end of the study with a final loss of > 70% by mass. Black residues remianed suggesting thermal degradation. Since thermal degradation started prior to the apparent exotherm, it is unlikely that the degradation process above 280 C is significantly exothermic.

The function of the substance is as a fire retardant.

Conclusions:

The sample appears to decompose with weight loss from 286 C and although there was an apparent exotherm at over 400 C with an energy of 271.4J/g., it is likely that this relates to melting of a decomposition product.  After heating to 500 C, there was no visible remains of the substance.
In the thermogravimetric assay, weight loss started ay ca 280 C and a steady weight loss continued until the end of the study with a final loss of > 70% by mass. Black residues remianed suggesting thermal degradation. Since thermal degradation started prior to the apparent exotherm, it is unlikely that the degradation process above 280 C is significantly exothermic.

The function of the substance is as a fire retardant.

Description of key information

The sample appears to decompose with weight loss from 286 C and although there was an apparent exotherm at over 400 C with an energy of 271.4J/g., it is likely that this relates to melting of a decomposition product.  After heating to 500 C, there was no visible remains of the substance.

In the thermogravimetric assay, weight loss started ay ca 280 C and a steady weight loss continued until the end of the study with a final loss of > 70% by mass. Black residues remained suggesting thermal degradation. Since thermal degradation started prior to the apparent exotherm, it is unlikely that the degradation process above 280 C is significantly exothermic.

The function of the substance is as a fire retardant.