Naphthenic acids, lithium salts

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

auto-ignition temperature, other

Remarks:

Low melting point solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

04 September 2017 - 15 September 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))

Version / remarks:

30 May 2008

Principles of method if other than guideline:

Apparatus: Carbolite flask heater
The test flask was heated in a flask heater. Aliquots of test item (tested as received) were dropped into the flask which was observed for signs of ignition over a 300 second period. This procedure was repeated, varying the sample size, as necessary, until the lowest temperature at which ignition, if any, occurred within 300 seconds of insertion, was determined. Where clean flasks were not used, the flask was flushed with air between sample insertions.

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

- Source and lot/batch No.of test material: A065/99
- Expiration date of the lot/batch: 1st July 2019
- Purity: UVCB

Key result

Auto-ignition temperature:

392 °C

Atm. press.:

>= 99.8 - <= 101.2 kPa

Test Temperature (ºC)	Clean Flask (Yes/No)	Weight (g)	Ignition Delay (s)	Observations
200	Yes	0.2	>300	No ignition.
250	Yes	0.2	>300	No ignition. Grey fumes were emitted.
300	Yes	0.2	>300	No ignition. Grey fumes were emitted.
350	No	0.3	>300	No ignition. Grey fumes were emitted.
400	No	0.3	>300	No ignition. Grey fumes were emitted.
450	No	0.3	3	An orange flame. Grey fumes were emitted.
430	No	0.2	>300	No ignition. Grey fumes were emitted.
440	No	0.3	3	An orange flame. Grey fumes were emitted.
438	No	0.3	7	An orange flame. Grey fumes were emitted.
434	Yes	0.3	4	An orange flame. Grey fumes were emitted.
432	Yes	0.3	3	An orange flame. Grey fumes were emitted.
428	Yes	0.3	9	An orange flame. Grey fumes were emitted.
426	Yes	0.3	4	An orange flame. Grey fumes were emitted.
420	Yes	0.3	5	An orange flame. Grey fumes were emitted.
402	Yes	0.2	>300	No ignition. Grey fumes were emitted.
410	Yes	0.3	9	An orange flame. Grey fumes were emitted.
406	Yes	0.2	>300	No ignition. Grey fumes were emitted.
408	Yes	0.2	9	An orange flame. Grey fumes were emitted.
406	Yes	0.4	7	An orange flame. Grey fumes were emitted.
404	Yes	0.4	7	An orange flame. Grey fumes were emitted.
400	Yes	0.5	>300	No ignition. Grey fumes were emitted.
402	Yes	0.5	6	An orange flame. Grey fumes were emitted.
400	Yes	0.6	5	An orange flame. Grey fumes were emitted.
390	Yes	0.6	>300	No ignition. Grey fumes were emitted.
392	Yes	0.7	4	An orange flame. Grey fumes were emitted.
390	Yes	0.8	>300	No ignition. Grey fumes were emitted.
390	Yes	1	>300	No ignition. Grey fumes were emitted.
390	Yes	0.4	>300	No ignition. Grey fumes were emitted.
390	Yes	0.3	>300	No ignition. Grey fumes were emitted.

Conclusions:

The auto-ignition temperature of naphthenic acids, lithium salts were determined to be 392 ± 5°C at atmospheric pressure.

Executive summary:

Envigo (2017) is a GLP-compliant study following guideline method A.15. It is considered reliable without restrictions (Klimisch 1). The auto-ignition temperature of lithium naphthenate was determined following the flask method.

Description of key information

The auto-ignition temperature of lithium naphthenate was determined to be 392 ± 5°C at atmospheric pressure.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

392 °C

Additional information

Envigo (2017) is a GLP-compliant study following guideline method A.15. It is considered reliable without restrictions (Klimisch 1). The auto-ignition temperature of lithium naphthenate was determined to be 392 ± 5°C at atmospheric pressure.