Trifluoro(trifluoromethoxy)ethylene

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable gases

Type of information:

experimental study

Adequacy of study:

key study

Study period:

July 2019 to February 2020

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EN 1839, Method T (Determination of explosion limits of gases and vapours)

Version / remarks:

2017

Deviations:

yes

Remarks:

Deviation in the interpretation of results: Ignitions were determined by the presence of audible pressure waves; temperature increases and partial melting of the parafilm seal as no flame were detected.

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
3 different samples were used due to additional testing requiring further test material:

ORIGINAL SAMPLE
- Batch: GAL01/21
- Expiration date of the lot/batch: May 2023
- Purity test date: 20 May 2019

ADDITIONAL SAMPLE 1
- Batch: B0912SR
- Expiration date of the lot/batch: May 2023
- Purity test date: 30 September 2019

ADDITIONAL SAMPLE 2
- Batch: A1210SR
- Expiration date of the lot/batch: May 2023
- Purity test date: 17 December 2019

Key result

Parameter:

lower explosion limit

Value:

7 vol%

Key result

Parameter:

upper explosion limit

Value:

70 vol%

Ignitions were determined by the presence of audible pressure waves, temperature increases and partial melting of the parafilm seal as, in general, no flame were detected. Although according to the EN 1839 method, the criterion for an explosion is flame/halo propagation it was agreed that the audible signs, the temperature increase and the other visible indicators sufficiently evidence combustion although no flame is visible.

Interpretation of results:

Category 1 (flammable gases) based on GHS criteria

Conclusions:

The flammable range of the test item at temperature ca.20°C and atmospheric pressure is 7-70% (%v/v).

Executive summary:

The test covers the determination of the lower and upper flammability of a gas in air at atmospheric pressure and temperature.

 

The test is GLP complaint and it was conducted in accordance with the procedure described in BS EN 1839:2017 (Tube method) with inclusion of special adaptations for halogenated materials as described in Annex 1 of the EN 1839 standard (500 mm tube instead of 300 mm one).

 

Ignitions were determined by the presence of audible pressure waves, temperature increases and partial melting of the parafilm seal as, in general, no flame were detected. Although according to the EN 1839 method, the criterion for an explosion is flame/halo propagation it was agreed that the audible signs, the temperature increase and the other visible indicators sufficiently evidence combustion although no flame is visible.

 

According to the results the flammable range of the test item at temperature ca.20°C and atmospheric pressure is 7-70% (%v/v).

Reference 2

Endpoint:

flammable gases

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other:

Remarks:

The data source is considered reliable although no details on test procedure are available in the report.

Qualifier:

no guideline followed

Principles of method if other than guideline:

The test was carried out using a test chamber with spheric shape with a spark Ni-Cr.

GLP compliance:

no

Key result

Parameter:

lower explosion limit

Value:

ca. 7 % (not further specified)

Key result

Parameter:

upper explosion limit

Value:

73 % (not further specified)

Interpretation of results:

Category 1 (flammable gases) based on GHS criteria

Conclusions:

Flammable limits: LFL 7% vol, ULF 73% vol.

Reference 3

Endpoint:

flammable gases

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Qualifier:

no guideline followed

Principles of method if other than guideline:

The methodology was not reported

GLP compliance:

no

Parameter:

lower explosion limit

Value:

7.5 % (not further specified)

Parameter:

upper explosion limit

Value:

50 % (not further specified)

Interpretation of results:

Category 1 (flammable gases) based on GHS criteria

Conclusions:

Flammable limits: LFL 7.5% vol., UFL 50% vol.

Description of key information

The flammable range of the test item at temperature ca.20°C and atmospheric pressure is 7-70% (%v/v). 

Key value for chemical safety assessment

Flammability:

flammable

Additional information

The flammability of perfluoromethyl vinyl ether was assessed in a Klimish-1 reliability study, GLP complaint and conducted in accordance with the procedure described in BS EN 1839:2017.

According to the results the flammable range of the test item at temperature ca.20°C and atmospheric pressure is 7-70% (%v/v).

 

Two additional data are available as supporting information. No details on the test methods are available for both the supporting studies however the conclusion are consistent whit the one of the key study:

LFL=7.0% vol. and UFL 73% vol. (Internal Company data without detailed documentation)

LFL=7.5% vol. and UFL 50% vol. (Company SDS)

Justification for classification or non-classification

The substance fulfills the GHS/CLP classification criteria for Flammable Gas Category 1B  because at the temperature of 20 °C and the standard pressure of 101,3 kPa it is ignitable when in a mixture of 13 % or less by volume in air and the lower explosion limit is higher than 6% by volume in air.