The Chemistry of Powder and Explosives - Sciencemadness Dot Org

432 PRIMARY EXPLOSIVES, DETONATORS, AND PRIMERS
minate when the charge was confined by a reenforcing cap and
0.37 gram when it was not confined. They also measured the
sand-crushing power of silver azide when loaded into No. 6 detonator
capsules and compressed under a pressure of 1000 pounds
per square inch, and compared it with that of mercury fulminate,
with the results which are tabulated below. It thus appears that
WEIGHT OF
CHARGE. GRAMS
0.05
010
020
0.30
0.50
0.75
1.00
WEIGHT OF SAND CRUSHED (GB\MS) BY
Silver
Azide
1.4
3.3
6.8
10.4
18.9
30.0
41.1
Mercury
Fulminate
0.00
0 00
4.2
8.9
16.0
261
372
the sand-crushing power of silver azide is not as much greater
than the sand-crushing power of mercury fulminate as the difference
in their initiatory powers would suggest. Storm and Cope 41
in their studies on the sand test found that the powers of fulminate
and of fulminate-chlorate mixtures to crush sand were
about proportional to the initiatory powers of these materials, but
the present evidence indicates that the law is not a general one.
Cyanuric Triazide
Cyanuric triazide, 42 patented as a detonating explosive by
Erwin Ott in 1921, is prepared by adding powdered cyanuric
chloride, slowly with cooling and agitation, to a water solution
of slightly more than the equivalent quantity of sodium azide.
Cl N3
4 A
|| I + 3NaN3 > || I + 3NaCl
Cl—C C—Cl N3—C C—N3
V V
Cyanuric triazide
41 hoc. cit.
*2Ott, Ber.T 54, 179 (1921); Ott, U. S. Pat. 1,390,378 (1921); Taylor and
Rinkenbach, U. S. Bur. Mines Repts. 0} Investigation 2513, August, 1923;
Kast and Haid, Z. angew. Chew., 38, 43 (1925).