4,4'-cyclohexylidenedi-o-cresol

Additional physico-chemical information

Administrative data

Endpoint:

minimum ignition energy

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Results of the study were provided in a summary letter report.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2003

Report date:

2003

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: ASTM E2019-99

Deviations:

no

Principles of method if other than guideline:

ASTM E2019-99 “Standard Test Method for Minimum Ignition energy of a Dust Cloud in Air” using an electrostatic Discharge Tester; 1.2 L clear plastic Hartmann tube; Electrodes Gap is ¼".

This test method covers the determination of the minimum ignition energy of a dust cloud in air by a high voltage spark. Data obtained from this test method provide relative data of ignition sensitivity of a dust cloud.

The values obtained are specific to the sample tested, the method used and the test equipment used. The values are not to be considered intrinsic material constants. Any change in particle size, shape, volatility will change results.

Four reference materials were tested which resulted in MIE values ranging from 1 to 140 mJ.

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

4,4'-cyclohexylidenedi-o-cresol

EC Number:

219-110-7

EC Name:

4,4'-cyclohexylidenedi-o-cresol

Cas Number:

2362-14-3

Molecular formula:

C20-H24-O2

IUPAC Name:

4-[1-(4-hydroxy-3-methylphenyl)cyclohexyl]-2-methylphenol

Test material form:

not specified

Details on test material:

- Synonyms: Dimethyl bisphenolcyclohexane; 4,4’-cyclohexylidene di-o-cresol; 1,1-Bis(4-hydroxy-3-ethyl)cyclohexane; Bis-OC-Z

Results and discussion

Any other information on results incl. tables

Minimum Ignition Energy of Dust Cloud in Air Test Results:

Test Material	Test Conditions	Particle Size (mesh)	% of Moisture Content (% by wt)	Capacitor Stored Ignition Energy (mJ)*	Spark Ignition Energy (MIE) (mJ)	Test Results (10 trials)
						Go (%)	No Go (%)
DMBPC	Room temp. = 20 °C;Relative Humidity = 20 %;Barometric Pressure = 762 mm Hg	-200(sieved prior to testing)	0.1 (As received)	24	2	20	80
				22	1.8	0	100

*Per ASTM E2019-99 Standard test Method for Minimum Ignition Energy of Dust Cloud in Air (Revision from October 26, 2000 and March 22, 2001 by E27.05. Subcommittee), Scope .p.p. 1.2 “The MIE is determined as the electrical energy stored in a capacitor which, when released as a high voltage spark, is just sufficient to ignite the dust cloud at its most easily ignitable concentration in air."

Applicant's summary and conclusion

Conclusions:

The minimum ignition energy (MIE) was determined to be 2 and 1.8 mJ when a capacitor-stored ignition energy of 24 and 22 mJ was used, respectively.

Executive summary:

The minimum ignition energy (MIE) of a dust cloud of the test material was investigated in accordance with the standardised guideline ASTM E2019-99, “Standard Test Method for Minimum Ignition energy of a Dust Cloud in Air”.

The test was conducted using an electrostatic Discharge Tester, 1.2 L clear plastic Hartmann tube and the Electrodes Gap was ¼”.

This test method covers the determination of the minimum ignition energy of a dust cloud in air by a high voltage spark. Data obtained from this test method provide relative data of ignition sensitivity of a dust cloud. Four reference materials were tested which resulted in MIE values ranging from 1 to 140 mJ.

The MIE was determined to be 2 and 1.8 mJ when a capacitor-stored ignition energy of 24 and 22 mJ was used, respectively.