2-Butene, 1,1,1,4,4,4-hexafluoro-, (2Z)-

Flammability

Administrative data

Endpoint:

flammable gases

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is a liquid

Cross-reference

Reason / purpose for cross-reference:

data waiving: supporting information

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

Qualifier:

according to guideline

Guideline:

ASTM E659 (Standard test method for autoignition temperature of liquid chemicals)

Deviations:

yes

Remarks:

Modification was inserting the gas mixture via stainless steel tube inside heated chamber in semi-confined condition.

GLP compliance:

not specified

Key result

Auto-ignition temperature:

492 °C

Atm. press.:

1 atm

Conclusions:

The autoignition temperature (AIT) of the chemical in air at atmospheric pressure is 492 °C.

Executive summary:

A small-metered sample of the material to be tested is inserted into a uniformly heated 0.5-liter glass flask containing air at a predetermined temperature. The content of the flask is observed in a darkened room for ten (10) minutes following insertion of the sample or until autoignition
occurs. Autoignition is evidenced by the sudden appearance of a flame inside the flask and by a sharp rise in the temperature of the gas mixture. The lowest internal flask temperature at which hot-flame ignition occurs for a series of prescribed sample volumes is taken to be the hot-flame
autoignition temperature (AIT) of the chemical in air at atmospheric pressure. In the initial trail 1-5, the cylinder containing Opteon™ MZ was at ambient laboratory room temperature. (19-20 C). Since there was not enough vapor pressure at ambient room temperature, the sample cylinder was conditioned in water bath at about 40-42°C prior to withdraw the gas sample for trial 6-25. The auto-ignition temperature tests were conducted in 560-ml flask and at atmospheric pressure.
The AIT results for material tested are 492 °C.