Captan

Oxidising properties

Link to relevant study record(s)

Reference

Endpoint:

oxidising solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

17 June to 29 October 2013

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

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

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

Test item code: 2013-001545
Batch / Lot number: 92138436
Content of Captan (stated): 94 %
Appearance / Colour: Solid Powder, off-white
Certificate of analysis: 04 April 2013
Expiry date: 20 July 2014
Storage conditions: Ambient temperature under dark and dry conditions.
Supplier: Makhteshim Chemical Works Ltd.

Contact with:

powdered cellulose

Key result

Sample tested:

test mixture as specified

Remarks:

Mixture of Test substance/cellulose: 3/7 (w/w), Table 5

Parameter:

burning rate

Result:

0.096 mm/s

Remarks on result:

other: mixture does not ignite

Key result

Sample tested:

test mixture as specified

Remarks:

Mixture of Test item/cellulose: 3/7 (w/w); Oxidizer concentration: 70 %, Table 2

Parameter:

burning rate

Result:

0.081 mm/s

Remarks on result:

other: mixture does not ignite

Sample tested:

reference mixture as specified

Remarks:

Mixtures of barium nitrate/cellulose: 6/4 (w/w), Table 1

Parameter:

burning rate

Result:

>= 0.784 - <= 0.837 mm/s

Table 1: Burning rates of barium nitrate/cellulose-standard mixtures

Mixture of barium nitrate/ cellulose (w/w)	Burning time after the reaction zone propagated an initial distance of 30 mm [s]	Covered distance after the reaction zone propagated an initial distance of 30 mm [mm]	Burning rate [mm/s]
6/4	250	200	0.800
6/4	239	200	0.837
6/4	247	200	0.810
6/4	248	200	0.806
6/4	255	200	0.784
6/4	249	200	0.803
Mean [mm/s]:			0.081
Std.Dev. [mm/s]:			0.473
Std.Dev. %:			0.651

RSD = relative standard deviation

 

Table 2: Burning rates of of test item/cellulose-mixtures containing 10 to 90 % of test item

Mixture of Test item/ cellulose (w/w)	Oxidizer concentration [%]	Burning time after the reaction zone propagated an initial distance of 30 mm [s]	Covered distance after the reaction zone propagated an initial distance of 30 mm [mm]	Burning rate [mm/s]
9/1	10	0	0	-
8/2	20	0	0	-
7/3	30	0	0	-
6/4	40	0	0	-
5/5	50	0	0	-
4/6	60	0	0	-
3/7	70	185	15	0.081
2/8	80	423	200	0.473
1/9	90	307	200	0.651

 

Table 5: Burning rates of test item/cellulose-mixtures with 30 % test item

Mixture of Test substance/ cellulose (w/w)	Burning time after the reaction zone propagated an initial distance of 30 mm [s]	Covered distance after the reaction zone propagated an initial distance of 30 mm [mm]	Burning rate [mm/s]
3/7	185	15	0.081
3/7	190	20	0.105
3/7	180	21	0.117
3/7	192	25	0.130
3/7	191	17	0.089
3/7	186	10	0.054
Mean [mm/s]:			0.096
Std.Dev. [mm/s]:			0.03
Std.Dev. %:			28.48

RSD = relative standard deviation

Interpretation of results:

GHS criteria not met

Conclusions:

Captan Technical is not considered to be an oxidizing substance because the maximum burning rate ofthe test item/cellulose-mixture was lower than the burning rate ofthe reference mixture.

Executive summary:

The aim of this study was the determination ofthe oxidizing properties (solids)
of the test item. The test was performed following EEC directive A.17. In accordance with the provisions of regulation 1272/2008, Annex I, 2.14, it is proposed classification is not required.

Description of key information

The aim of this study was the determination ofthe oxidizing properties (solids)
of the test item. The test was performed following EEC directive A.17. In accordance with the provisions of regulation 1272/2008, Annex I, 2.14, it is proposed classification is not required.

Additional information

Due to chemical structure captan is not expected to have oxidising properties. All chlorine and oxygen atoms are bond to carbon.

Justification for classification or non-classification

According to the EU regulation No 1272/2008 the test substances is not considered to have oxidising properties.