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Administrative data

Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
2 to 4 October 2017
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other:
Version / remarks:
The testing laboratory is GLP compliant and the test was carried out according to the principles of GLP. An internal standard operating procedure was followed for the direct scanning calorimetry tests.
Principles of method if other than guideline:
Date 02/10/2017
SOP Reference CTL SOP 320
Test System DSC System 1
Test Filename DSC4028001957A
Crucible Type Gold-lined steel (high pressure, sealed)
Sample Preparation Tested as received
Start Temperature -40°C
Trip Temperature 400°C
Ramp Rate 4 K.min-1
Test Atmosphere Air
Sample Mass 4.7 mg
GLP compliance:
yes

Test material

Constituent 1
Reference substance name:
Hop, Humulus lupulus, ext.
EC Number:
232-504-3
EC Name:
Hop, Humulus lupulus, ext.
Cas Number:
8060-28-4
Molecular formula:
No simple molecular formula for UVCB
IUPAC Name:
Hop, Humulus lupulus, ext.
Test material form:
liquid: viscous
Remarks:
Depending on the extraction conditions and on the hop variety, the colour of the extract can vary from yellow to dark green. It is a semi-fluid paste at room temperature. The product becomes more fluid when heated.
Specific details on test material used for the study:
Hop extract batch number 160025. This is a liquid carbon dioxide extract of hops variety 'Cascade'.

Results and discussion

Auto-ignition temperature (liquids / gases)
Key result
Remarks on result:
other: The DSC trace shows that there are no dangerous events up to 140 oC.

Any other information on results incl. tables

Notes from the test report: "The sample was observed to undergo an exothermic event from 60.3°C which had a heat of decomposition of -24.7 J.g-1. A second exothermic event was then observed to commence from 138.0°C which had a heat of decomposition of -157.7 J.g-1. No further significant energetic events were noted up to 400°C."

The DSC plot is attached - see "Illustration (picture/graph)"

Applicant's summary and conclusion

Conclusions:
The DSC trace for hop extract shows two exothermic events: one at 60.3 oC with a heat of decomposition of -24.7 J per g, and one at 138.0 oC with a heat of decomposition of -157.7 J per g. No further significant energetic events were noted up to 400 oC. The exothermic decomposition is less than 500 J per g (Regulation (EC) 1272/2008, Annex I, Part 2, 2.1.4.3 (c)), so the material is not explosive, and it is less than 300 J per g (Regulation (EC) 1272/2008, Annex I, Part 2, 2.8.2.1) so it is not self-reactive. The flash point of hop extract is >60 oC. The DSC trace shows no dangerous events when heating to 140 oC.

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