Copper, diammine[5,5'-bi-1H-tetrazolato(2-)-kN1, kN1']

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:

2016-11-18

Reliability:

1 (reliable without restriction)

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Deviations:

no

GLP compliance:

no

Key result

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks on result:

positive (not further specified)

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

Table 1: results of thermal sensitivity (Koenen test)

test n°	mass (g)	diameter (mm)	result by test	Result
1	17.02	6	fragmentation	Positive
2	17.02	6	fragmentation	Positive
3	17.02	6	fragmentation	Positive
4	-	2	no test	Positive
5	-	2	no test	Positive
6	-	2	no test	Positive

Table 2: mechanical sensitivity (shock/friction)

	test with a load of	results by test	result
shock	40 J	-/-/-/-/-/-no reaction	negative
shock	7.5 J	no test	negative
friction	360 N	-/-/-/-/-/-no reaction	negative
friction	120 N	no test	negative

Interpretation of results:

study cannot be used for classification

Conclusions:

The CuDABT substance presents danger of explosion when subjected to the effect of a flame (thermal sensitivity).

Executive summary:

The EU A14 test method provides a scheme of testing to determine whether a solid or a pasty substance presents an explosion risk when submitted to the effect of a flame (thermal sensitivity), or to shock or friction (sensitivity to mechanical stimuli), and whether a liquid substance presents a danger of explosion when submitted to the effect of a flame or shock.

Methods:

The method comprises three parts:

a)   a test of thermal sensitivity (with apparatus of Koenen test),

b)   a test of mechanical sensitivity with respect to shock (40J),

c)   a test of mechanical sensitivity with respect to friction (360 N).

The method yields data to assess the likelihood of initiating an explosion by means of certain common stimuli. The method is not intended to ascertain whether a substance is capable of exploding under any conditions.

Results:

The test result for the CuDABT substance (ref. INERIS 16AH595) is positive for the tests of thermal sensitivity, negative for the tests of mechanical sensitivity with respect to shock and to friction.

Conclusion:

The CuDABT substance presents danger of explosion when submitted to the effect of a flame (thermal sensitivity).

Reference 2

Endpoint:

explosiveness, other

Remarks:

DOT classification

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

July 2005

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study without detailed documentation

Qualifier:

equivalent or similar to guideline

Guideline:

other: Testing for DOT classification

Deviations:

not applicable

GLP compliance:

no

Parameter:

other: No. 8 Electrical Blasting Cap Test

Remarks on result:

other: Partially exploded and scattered, but did not detonate

Parameter:

other: Card Gap Test (TB-700-2 - Zero Card)

Remarks on result:

other: The witness plate was recovered intact with no hole and dented

Interpretation of results:

study cannot be used for classification

Conclusions:

No. 8 Electric Blasting Cap Test:
Trial # 1 with one # 8 Blasting Cap: Partially exploded & scattered, but did not detonate. (No Compression / 176.05 grams)
Trial # 2 with one # 8 Blasting Cap: Partially exploded & scattered, but did not detonate (No Compression / 141.00 grams)
Trial # 3 with two # 8 Blasting Caps: Partially exploded & scattered, but did not detonate. (Lead Block Compression: 0.042’/ 142.32 grams)
Thermal Stability Test (75 C / 48 h): Stable (Wt Loss: 0.50% / 67.55 grams)
Impact Test (BOE Impact Tester):       Sample failed to ignite or explode in 6 trials at a drop height of 10".
Friction Test (BAM Friction Tester):       Sample failed to ignite or explode in 6 trials at 160 Newtons.
Burning Test:       The sample burned slowly (1 lb. / 3 min. 51 sec.) with intermittent orange flames, black smoke and hissing noise, there is no evidence of explosion.
Card Gap Test (TB-700-2 - Zero Card):
Card Gap Test of Copper diammonium bitetrazole: the witness plate was recovered intact with no hole & dented. (Dent Depth: 0.625")
Card Gap Test of Sand: The witness plate was recovered intact & dented slightly. (Dent Depth: 0.180")

Executive summary:

No. 8 Electric Blasting Cap Test:

Trial # 1 with one # 8 Blasting Cap: Partially exploded & scattered, but did not detonate. (No Compression / 176.05 grams)

Trial # 2 with one # 8 Blasting Cap: Partially exploded & scattered, but did not detonate (No Compression / 141.00 grams)

Trial # 3 with two # 8 Blasting Caps: Partially exploded & scattered, but did not detonate. (Lead Block Compression: 0.042’/ 142.32 grams)

Thermal Stability Test (75 C / 48 h): Stable (Wt Loss: 0.50% / 67.55 grams)

Impact Test (BOE Impact Tester):       Sample failed to ignite or explode in 6 trials at a drop height of 10".

Friction Test (BAM Friction Tester):       Sample failed to ignite or explode in 6 trials at 160 Newtons.

Burning Test:       The sample burned slowly (1 lb. / 3 min. 51 sec.) with intermittent orange flames, black smoke and hissing noise, there is no evidence of explosion.

Card Gap Test (TB-700-2 - Zero Card):

Card Gap Test of Copper diammonium bitetrazole: the witness plate was recovered intact with no hole & dented. (Dent Depth: 0.625")

Card Gap Test of Sand: The witness plate was recovered intact & dented slightly. (Dent Depth: 0.180")

Description of key information

The test results for the CuDABT substance is positive for the tests of thermal sensitivity, negative for the tests of mechanical sensitivity with respect to shock and to friction.

The CuDABT substance presents danger of explosion when subjected to the effect of a flame (thermal sensitivity). According to CLP regulation, a default classification in category 1.1 must be retained.

However, results obtained for DOT classification allow to refine the classification. As CuDABT did not detonate in "electric blasting cap test" and denotation did not spread in "card gap test", a classification in category 1.3 is proposed.

Key value for chemical safety assessment

Explosiveness:

explosive

Justification for classification or non-classification

The test result for the CuDABT substance is positive for the tests of thermal sensitivity, negative for the tests of mechanical sensitivity with respect to shock and to friction.

The CuDABT substance presents danger of explosion when submitted to the effect of a flame (thermal sensitivity). According to CLP regulation, a default classification in category 1.1 must be retained.

However, results obtained for DOT classification allow to refine the classification. As CuDABT did not detonate in "electric blasting cap test" and denotation did not spread in "card gap test", a classification in category 1.3 is proposed.