Charcoal

Oxidising properties

Administrative data

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2010-07-01 to 2010-07-01

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The study was conducted in accordance with EC directive 440/2008, method A.17 "oxidizing properties (solids)", dated 31. May 2008

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method A.17 (Oxidising Properties (Solids))

Deviations:

yes

Remarks:

The single determinations of the burning rate differed more than 10% from the respective arithmetic mean because the test item is a natural product and not homogeneous. Also the test item mixtures showed no vigorous reaction.

Principles of method if other than guideline:

A preliminary test is carried out in the interests of safety. No further testing is required when the preliminary test clearly indicates that the test substance has oxidising properties. When this is not the case, the substance should then be subject to the full test. In the full test the substance to be tested and a defined combustible substance will be mixed in various ratios.
Each mixture is then formed into a pile and the pile is ignited at one end. The maximum burning rate determined is compared with the maximum burning rate of the reference mixture (barium nitrate with powdered cellulose).

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

Charcoal

EC Number:

240-383-3

EC Name:

Charcoal

Cas Number:

16291-96-6

IUPAC Name:

Carbón vegetal

Details on test material:

Name: Charcoal (Probe 1: C-Fix = 73.3%)
Batch no.: 19062009 1PP
Appearance: Charcoal typic
Composition: Charcoal
CAS no.: 16291-96-6
EINECS-no.: 240-383-3
Purity: C-Fix: 73.3%
Expiry date: Dec. 2030
Storage: Room temperature 20±5 °C, keep away from humidity

Study design

Contact with:

powdered cellulose

Duration of test (contact time):

>= 124 - <= 4 013 s

Results and discussion

Test results (Oxidising solids)

Test results (Oxidising solids) 1

Sample tested:

test mixture (not specified)

Remarks:

migrated information

Parameter:

maximum burning rate

Result:

ca. 1.69 other: mm/s (migrated information)

Test results (Oxidising solids) 2

Sample tested:

reference mixture (not specified)

Remarks:

migrated information

Parameter:

maximum burning rate

Result:

ca. 1.83 other: mm/s (migrated information)

Any other information on results incl. tables

Observations

All test item mixtures showed no signs of oxidising properties. Even the mixture of the highest burning rate, 10 % test item with 90 % cellulose, burned without any sparkling or fizzling.

Burning rates reference item

In the following table, the measured data of the reference item are presented.

Burning rate of reference item mixtures

% Ba(NO3)2	Burning time (s)	Burning rate (mm/s)
50	139	1.44
60	109	1.83
70	119	1.68

 

Burning rates test item

In the following table, the measured data of the test item mixtures are presented.

Burning rate of test item mixtures

% Test item	Burning time (s)	Burning rate (mm/s)
10	124	1.61
20	extinction
30	extinction
40	4013	0.05
50	2975	0.07
60	2829	0.07
70	2280	0.09
80	1691	0.12
90	2015	0.10

 

The mixture with 10% test item charcoal (Probe 3: C-Fix = 88.7%) showed the highest burning rate. As this burning rate was lower than the highest burning rate of the reference item mixtures, the determination of burning rate was repeated five times for each of the three mixtures test item/cellulose with the highest burning rates.

Determination of burning rate mixture 10/90% test item / cellulose

Measurement	Burning time (s)	Burning rate (mm/s)
1 (from first performance)	124	1.61
2	122	1.64
3	126	1.59
4	119	1.68
5	121	1.65
6	118	1.69
Mean	125	1.64
Standard deviation in mm/s		0.04
Standard deviation in %		2.46%

Determination of burning rate mixture 80/20% test item / cellulose

Measurement	Burning time (s)	Burning rate (mm/s)
1 (from first performance)	1691	0.12
2	1474	0.14
3	1499	0.13
4	1584	0.13
5	1682	0.12
6	1252	0.16
Mean		0.13
Standard deviation in mm/s		0.02
Standard deviation in %		11.62%

 

Determination of burning rate mixture 90/10% test item / cellulose

Measurement	Burning time (s)	Burning rate (mm/s)
1 (from first performance)	2015	0.10
2	1495	0.13
3	1572	0.13
4	1470	0.14
5	1445	0.14
6	1320	0.15
Mean		0.13
Standard deviation in mm/s		0.02
Standard deviation in %		13.35

 

Applicant's summary and conclusion

Interpretation of results:

other: no oxidising properties

Remarks:

Migrated information

Conclusions:

Based on this test and under the test conditions used, the test item charcoal (Probe 3: C-Fix = 88.7%) is classified as not oxidising.