5-bromo-1,3-dichloro-2-fluorobenzene

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

auto-ignition temperature (liquids)

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

The change from 2 °C increments to 5 °C increments is believed to have no impact on the validity of the study.

Qualifier:

according to guideline

Guideline:

other: IEC 60079-20-1, Section 7, "Method of Test for Auto-Ignition Temperature"

Deviations:

yes

Remarks:

5 °C temperature increments rather than the specified 2 °C increments

GLP compliance:

yes (incl. QA statement)

Key result

Auto-ignition temperature:

610 °C

Atm. press.:

739 - 764 mm Hg

Room temperature: 20 - 23 °C

Atmospheric pressure: 739 - 764 mmHg (98.52 - 10.19 kPa)

Table 1: test giving lowest ignition temperature and no-ignition temperatures obtained from five test series

Test temperature (°C)	Sample volume (µL)	Ignition delay	Result
610	100	13	Ignition
605	50	>300	No ignition
605	70	>300	No ignition
605	100	>300	No ignition
605	150	>300	No ignition
605	200	>300	No ignition

Conclusions:

The Auto-Ignition Temperature (AIT) of the test substance = 610 ± 30 °C.

Executive summary:

The auto-ignition temperature of the substance has been tested in accordance with the standard IEC 60079 -20 -1, section 7, "Method of Test for Auto-Ignition Temperature”, but with 5 °C temperature increments rather than the specified 2 °C increments under GLP. The change in the termperature increments is believed to have no impact on the validity of the study.

A 200 mL Erlenmeyer flask was enclosed within a cylindrical furnace capable of maintaining the surfaces of the flask at a uniform, constant temperature. The surface temperatures are monitored by means of thermocouples. A known quantity of the test substance was added to the flask in a series of tests. The interior of the flask was then observed for signs of vapour ignition. The delay time from the addition of the test substance to an ignition was recorded. The room temperature was between 20 - 23 °C, and the atmospheric pressure ranged from 739 - 764 mmHg. The substance has a melting point close to ambient, so the bulk sample used for the study was allowed to liquefy at the laboratory temperature prior to sampling for the test. The lowest ignition temperature was found to be 610 °C. Five tests with different sample volumes at 605 °C demonstrated that this was the no-ignition temperature.

Description of key information

The auto flammability of the substance has been determined in accordance with IEC 60079-20-1, Section 7, "Method of Test for Auto-Ignition Temperature" under GLP in a reliable and valid study.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

610 °C