1H-Pyrazole, 1,4-dimethyl-

Auto flammability

Administrative data

Endpoint:

auto-flammability

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP compliant, guideline study, available as unpublished report, no restrictions, fully adequate for assessment

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2015

Report date:

2015

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

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

GLP compliance:

yes (incl. QA statement)

Remarks:

Chilworth Technology Limited, Process Safety Laboratories, Phi House, Southampton Science Park, Southampton SO16 7NS, United Kingdom

Test material

Test material information

Constituent 1

Reference substance name:

1,4-Dimethyl-1H-pyrazole

EC Number:

600-813-6

Cas Number:

1072-68-0

Molecular formula:

C5H8N2

IUPAC Name:

1,4-Dimethyl-1H-pyrazole

Details on test material:

- Name of test material (as cited in study report): 1,4-dimethyl-pyrazole
- Physical state: Clear colourless liquid
- Analytical purity: Approx 99.8 %
- Lot/batch No.: 34040268E0
- Expiry date: 15 July 2016

Results and discussion

Auto-ignition temperature (liquids / gases)

Auto-ignition temperature:

401 °C

Atm. press.:

1 023 hPa

Remarks on result:

other:

Any other information on results incl. tables

Hot flame autoignition temperature (°C): 401

Including correction factor for barometric pressure (°C): 401

Time lag to autoignition (s): 32

Barometric pressure (kPa): 102.3

Sample quantity (µL): 200

No cool flames were observed. An orange flame was observed at the autoignition temperature.

Atm. Press (kPa)	Inner Flask Temp. (°C)	Conc. (µL)	Clean flask? Yes / No	Ignition? Yes / No	Time lag (s)	Comments
102.3	500	100	Y	Y	7	Large flame
102.3	410	100	Y	Y	38	Large flame
102.3	395	100	Y	N	-	-
102.3	404	100	Y	Y	43	Large flame
102.3	401	100	Y	N	-	-
102.3	401	200	Y	Y	32	Large flame
102.3	398	200	Y	N	-	-
102.3	398	300	Y	N	-	-
104.0	398	250	Y	N	-	-
104.0	398	400	Y	N	-	-
104.0	398	150	Y	N	-	-
104.0	398	100	Y	N	-	-