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Auto flammability

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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-01-25 - 2018-03-21
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
ASTM E659 (Standard test method for autoignition temperature of liquid chemicals)
Deviations:
no
GLP compliance:
no
Key result
Auto-ignition temperature:
240 °C
Atm. press.:
>= 1 002 - <= 1 006 mBar

The autoignition temperature of Phosphorodithioic Acid is 240°C. The test result is summarized in Table 2-1. A summary of the test data is provided in Table A-1 in Appendix A. Figure 2-1 illustrates the observations of ignition or non-ignition of these samples at specific fuel concentrations as a function of temperature.

Table 2 -1: Autoignition Temperature Test Results

 Sample  Autoignition Temperature (°C)
 Phorphorodithioic Acid  240

 

It should be noted that the flask is open to the atmosphere; therefore, vapours are escaping from the test apparatus over the course of the test. The more volatile vapours will vent out first which may minimize the probability of these vapors autoigniting in the flask.

Table A-1: Detailed Autoignition Temperature Results for Phosphordithioic acid:

 Trial  Sample Quantity (g)  Test Temperature (°C)  Iginition Delay Time (s)  Result
 1  0.2  200  -  non Ignition
 2  0.3  240  -
 3  0.3  280  17.56 Ignition
 4  0.3  260  41.2
 5  0.3  249  90.06
 6  0.3  243  -  non Ignition 
 7  0.3  246  -
 8  0.4  246  112.31  Ignition
 9  0.4  243  -  non Ignition
 10  0.5  243  142.18  Ignition 
 11  0.5  240  165.4
 12  0.5  237  -  non Ignition
 13  0.6  237  -
 14  0.7  237  -
Conclusions:
Autoignition temperature of the test sample is 240 °C at a pressure of 1004 - 1006 mbar.
Executive summary:

Autoiginitionn temperature of the test substrate was performed in accordance with ASTM E659.

Autoignition temperature of the test sample is 240 °C at a pressure of 1004 - 1006 mbar.

Description of key information

Autoiginitionn temperature of the test substrate was performed in accordance with ASTM E659.

Autoignition temperature of the test sample is 240 °C at a pressure of 1004 - 1006 mbar.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
240 °C

Additional information

pressure was 1004 -1006 mbar