mecoprop-P (ISO); (R)-2-(4-chloro-2-methylphenoxy)propionic acid

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Study period:

11 February 1999 to 16 April 1999

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.6316 (Explodability)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Deviations:

no

GLP compliance:

yes

Key result

Test series:

other: Not specified

Method:

UN Test 1 (b): Koenen test

Parameter:

limiting diameter (mm)

Remarks:

6 mm orifice plates followed by three using 2 mm orifice plates

Result:

negative, no explosion

Remarks on result:

other: No sign of ignition or explosion.

Key result

Test series:

other: Not specified

Method:

UN Test 3 (a) (ii): BAM Fallhammer

Parameter:

other: An audible explosion or if the material ignites

Result:

negative, no explosion

Remarks on result:

other: No sign of ignition or explosion.

Key result

Test series:

other: Not specified

Method:

UN Test 3 (b) (i): BAM friction apparatus

Parameter:

other: An audible explosion, crepitation or bursting into flame

Result:

negative, no explosion

Remarks on result:

other: No sign of ignition or explosion but slight decomposition indicated by dark mark on porcelain plate.

Thermal Test

	T1 (Seconds)	T2 (Seconds)	Observations
6 mm Orifice
Test 1	75	300	Yellow flame
Test 2	79	300	Yellow flame
Test 3	77	300	Yellow flame
2 mm Orifice
Test 1	85	300	Yellow flame
Test 2	84	300	Yellow flame
Test 3	82	300	Yellow flame

Where:

T1 = Time from start of test to flame from nozzle.

T2 = Time from start of test to explosion, or end of test (300 seconds).

In each case, the tubes were recovered intact.

 

Shock Test

Replicate	1	2	3	4	5	6
Result	N	N	N	N	N	N

Where:

N = No evidence of explosion or decomposition.

 

Friction Test

Replicate	1	2	3	4	5	6
Result	D	D	D	D	D	D

Where:

D = No sign of ignition or explosion but slight decomposition indicated by dark mark on porcelain plate.

Interpretation of results:

other: Not classified according to EU criteria.

Conclusions:

Under the conditions of the study the test material is not explosive.

Executive summary:

The explosivity of the test material was assessed according to EU Method A.14 and EPA OPPTS Method 830.6316 and in compliance with GLP.

Koenen test apparatus was used for determination of sensitivity to heat (flame), a fall hammer for determination of sensitivity to shock and a friction test apparatus for determination of sensitivity to friction.

Koenen apparatus made according to BAM 785-0004 with propane gas supply through calibrated flow meter. The four burners consume 3 - 4 L/min of propane gas. The test material was packed into new drawn steel tubes 75 mm x 24 mm i.d. in three equal portions, tamping each portion with 80N force. The tubes were closed with an orifice plate (6 mm or 2 mm orifice) and heated at the specified rate on the Koenen apparatus for 5 minutes or until an explosion occurred. Three tests were conducted using 6 mm orifice plates followed by three using 2 mm orifice plates.

Impact hammer apparatus made according to BAM 782-0005 with 10 kg weight and specified sample dies. The dry test substance was sieved and 40 mm^3 of sieved test material was put in the die assembly and placed on the anvil in the drop hammer apparatus. A 10 kg weight was released from a height of 0.4 m. The test was performed six times using a different sample and die assembly on each occasion.

Friction apparatus made according to BAM 781-0000 and consisting of a fixed porcelain peg and a porcelain plate held in a carriage. The peg is loaded to a known force by attaching weights. Dried test material (10 mm^3) was placed on the porcelain plate, and the porcelain peg drawn once to and fro across with a loading of 360 N. The test was performed six times, using a fresh sample on each occasion.

During the thermal test yellow flame was observed. In each case the tubes were recovered intact.

During the shock test there was no evidence of explosion or decomposition.

During the friction test there was no sign of ignition or explosion but slight decomposition indicated by dark mark on the porcelain plate.

Under the conditions of the study the test material is not explosive.

Description of key information

Comb (2000)

Under the conditions of the study, the test material is not explosive.

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

Comb (2000)

The explosivity of the test material was assessed according to EU Method A.14 and EPA OPPTS Method 830.6316 and in compliance with GLP. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

In accordance with the criteria for classification as defined in Annex I, Regulation (EC) No 1272/2008, the material does not require classification with respect to

Koenen test apparatus was used for determination of sensitivity to heat (flame), a fall hammer for determination of sensitivity to shock and a friction test apparatus for determination of sensitivity to friction.

Koenen apparatus made according to BAM 785-0004 with propane gas supply through calibrated flow meter. The four burners consume 3 - 4 L/min of propane gas. The test material was packed into new drawn steel tubes 75 mm x 24 mm i.d. in three equal portions, tamping each portion with 80N force. The tubes were closed with an orifice plate (6 mm or 2 mm orifice) and heated at the specified rate on the Koenen apparatus for 5 minutes or until an explosion occurred. Three tests were conducted using 6 mm orifice plates followed by three using 2 mm orifice plates.

Impact hammer apparatus made according to BAM 782-0005 with 10 kg weight and specified sample dies. The dry test substance was sieved and 40 mm^3 of sieved test material was put in the die assembly and placed on the anvil in the drop hammer apparatus. A 10 kg weight was released from a height of 0.4 m. The test was performed six times using a different sample and die assembly on each occasion.

Friction apparatus made according to BAM 781-0000 and consisting of a fixed porcelain peg and a porcelain plate held in a carriage. The peg is loaded to a known force by attaching weights. Dried test material (10 mm^3) was placed on the porcelain plate, and the porcelain peg drawn once to and fro across with a loading of 360 N. The test was performed six times, using a fresh sample on each occasion.

During the thermal test yellow flame was observed. In each case the tubes were recovered intact.

During the shock test there was no evidence of explosion or decomposition.

During the friction test there was no sign of ignition or explosion but slight decomposition indicated by dark mark on the porcelain plate.

Under the conditions of the study the test material is not explosive.

Justification for classification or non-classification

In accordance with the criteria for classification as defined in Annex I, Regulation (EC) No 1272/2008, the material does not require classification with respect to explosive properties.