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Physical & Chemical properties

Flash point

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Endpoint:
flash point of flammable liquids
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
25 August 2009 – 12 October 2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
This study has been performed according to OECD and EC guidelines and according to GLP principles.
Qualifier:
according to
Guideline:
EU Method A.9 (Flash-Point)
Deviations:
no
Qualifier:
according to
Guideline:
ISO 2719 (Determination of flash point - Pensky-Martens closed cup method)
Version / remarks:
2002
Deviations:
no
Qualifier:
according to
Guideline:
ISO No., other: ASTM International, ASTM D 93: “Standard Test Methods for Flash Point by Pensky-Martens Closed Cup Tester”, December 10, 2002.
Deviations:
no
Remarks:
note this is not a ISO but a ASTM guideline
GLP compliance:
yes (incl. certificate)
Type of method:
closed cup
Key result
Flash point:
51 °C
Atm. press.:
101.5 kPa
Conclusions:
The Pensky-Martens closed cup method was applied for the determination of the flash-point of HEXAHYDRO-1,3,5-TRIMETHYL-S-TRIAZINE. The flash-point of the test substance was 51°C.
Executive summary:

The flash point of the substance was determined in accordance with EU Method A.9. The flash point was determined to be 51°C (Baltussen, 2010).

Endpoint:
flash point of flammable liquids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
3rd July 2019 inclusive
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
Not performed according to GLP
Qualifier:
according to
Guideline:
ISO 2719 (Determination of flash point - Pensky-Martens closed cup method)
Version / remarks:
2002
Deviations:
no
Qualifier:
according to
Guideline:
UN Manual of Tests and Criteria: Test L.2 (Sustained combustibility test)
Deviations:
no
Qualifier:
according to
Guideline:
ASTM D93 (Standard test methods for flash point by pensky-martens closed cup tester)
Deviations:
no
GLP compliance:
not specified
Type of method:
closed cup
Flash point apparatus:
Pensky-Martens apparatus
Key result
Flash point:
61 °C
Atm. press.:
101.5 kPa
Key result
Test procedure:
sustaining combustion, test conditions 60°C, 60 s
Result:
not sustaining combustion
Key result
Test procedure:
sustaining combustion, test conditions 60°C, 30 s
Result:
not sustaining combustion
Key result
Test procedure:
sustaining combustion, test conditions 75°C, 60 s
Result:
not sustaining combustion
Key result
Test procedure:
sustaining combustion, test conditions 75°C, 30 s
Result:
not sustaining combustion

The three flash point values recorded were as follows: 62, 59, 62°C. The average of the three measurements is reported as the key value.

During the sustained combustibility tests, although flashing was momemtarily observed, combustion was not sustained for more than 15 seconds.

Interpretation of results:
GHS criteria not met
Conclusions:
The Pensky-Martens closed cup method was applied for the determination of the flash point of the test substance. The flash point of the test substance was 61°C.
The sustained combustibility test showed that combustion was not sustained for more than fifteen seconds.
Executive summary:

The flash point of the substance was determined in accordance with ISO 2719:2002, using Pensky-Martens apparatus. The flash point was determined to be 61°C.

Since one of the individual flash point results was below 60°C, sustained combustibility was also assessed in accordance with Test L.2 of the UN Manual of Tests and Criteria. The sustained combustibility test showed that combustion was not sustained for more than fifteen seconds. Hence, in accordance with CLP section 2.6.4.5 in Flammable liquids:

"Liquids with a flash point of more than 35 °C and not more than 60 °C need not be classified in Category 3 if negative results have been obtained in the sustained combustibility test L.2, Part III, section 32 of the UN RTDG, Manual of Tests and Criteria." the substance was not classified as a flammable liquid.

Description of key information

Flash Point = 61°C, ASTM 93, (2019)

Sustained Combustibility Test: Negative, Test L.2, Part III, Section 32 of the UN RTDG, Manual of Tests and Criteria, (2019)

Key value for chemical safety assessment

Flash point at 101 325 Pa:
61 °C

Additional information

One key study is submitted for this endpoint.

The supporting study conducted in accordance with EC Method A.9. Using this method, the flash point was determined to be 51°C (Baltussen, 2010).

The key study was conducted in accordance with ASTM 93. The flash point was determined to be 61 °C (Mountford, 2019). Sustained combustibility was also assessed in accordance with Test L.2 of the UN Manual of Tests and Criteria. The sustained combustibility test showed that combustion was not sustained for more than fifteen seconds. Hence, in accordance with CLP Regulation (EC) No. 1272/2008, Section 2.6.4.5 on Flammable liquids:

"Liquids with a flash point of more than 35 °C and not more than 60 °C need not be classified in Category 3 if negative results have been obtained in the sustained combustibility test L.2, Part III, section 32 of the UN RTDG, Manual of Tests and Criteria." the substance was not classified as a flammable liquid. Based on the experience of the registrants of this substance, this study was more reflective of the flammable properties of the substance. The sustained combustibility test as part of this study confirms that the substance does not exhibit flammability.

It is therefore concluded that that substance is not classified as flammable in accordance with CLP Regulation, (EC) No. 1272/2008.