2,2'-[azobis(1-methylethylidene)]bis[4,5-dihydro-1H-imidazole dihydrochloride

Explosiveness

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1997

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Part I: Classification procedures, test methods and criteria relating to explosives of Class 1

Version / remarks:

2nd revised edition, 1995

GLP compliance:

no

Key result

Test series:

UN Test series 2

Remarks:

Test was performed according to UN Test A.1 (BAM 50/60 steel tube test). A negative result (assessment "no") can be regarded also as a negative result of UN gap test. The tested substance was WAKO V-50.

Method:

UN Test 2 (a): UN gap test

Parameter:

other: A significant portion of unreacted substance remains

Value:

0

Result:

negative, not sensitive to detonative shock

Remarks:

According to a statement of the German competent authority BAM (Bundesanstalt für Materialforschung und -prüfung) the testing of WAKO VA-044 can be waived baised on the experience with WAKO V-50.

Key result

Test series:

UN Test series 2

Method:

UN Test 2 (b): Koenen test

Parameter:

limiting diameter (mm)

Value:

1

Result:

negative, no explosion

Remarks:

The limiting diameter is < 1.0 (mm) and the effect in all tests is of type "O".

Key result

Test series:

UN Test series 2

Method:

UN Test 2 (c) (i): Time/pressure test

Parameter:

other: Time for a pressure rise from 690 to 2070 kPa (ms)

Value:

16 230

Result:

negative, no or slow deflagration

Interpretation of results:

GHS criteria not met

Conclusions:

In all three types of test series 2 of the UN recommendations on the Transport of dangerous Goods (5th revised edition) (UN gap test, Koenen test, Time/pressure test) a "-" is obtained. The substance can therefore be regarded as too insentitive for acceptance into class 1.

Reference 2

Endpoint:

explosiveness, other

Type of information:

experimental study

Adequacy of study:

key study

Study period:

June 30, 2014 - October 29, 2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Number of fragments:

0

Remarks on result:

not thermal sensitive if heated under defined confinement

Key result

Parameter:

sensitiveness to impact: impact energy (J)

Remarks on result:

not sensitive to impact using an impact energy of 40 J

Key result

Parameter:

sensitiveness to friction: friction load (N)

Remarks on result:

not sensitive to friction using a friction load of 360 N

thermal sensitivity: Using 2 mm and 6 mm orifice, a short fizzling and a small smoke fountain were observed after approximately 30 seconds.

mechanical sensitivity (shock): white dust in experiment 1 and black residue in experiment 4 were obsereved.

mechanical sensitivity (Friction): Every experiment yielded a black line on the porcelain peg. According to the German competence authority BAM ("Bundesanstalt für Materialprüfung"), this observation is no sign of explosive properties.

 

Interpretation of results:

study cannot be used for classification

Conclusions:

2,2'-Azobis-(2-(2-imidazolin-2 yl) propane dihydrochloride can be considered as "not explosive under the conditions of guideline EU A.14"

Description of key information

According to the UN recommendations on the transport of dangerous goods (5th edition) 2,2'-Azobis-(2-(2-imidazolin-2 yl) propane dihydrochloride can be regarded as too insensitive for acceptance into class 1.

The substance is considered as “not explosive under the conditions of guideline EU A.14”.This guideline does not cover the explosive properties of dust consisting of test item (resp. mixtures of dust and air). Therefore, the result is stated as “not explosive under the conditions of guideline EU A.14”

Key value for chemical safety assessment

Explosiveness:

non explosive