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|  MIL-L-14758 (MU)
4.2.3 Testing (NOTE: To safely dispose of waste lead azide,
add all azide residues or contamination into 50 times its weight
of 15 percent eerie ammonium nitrate.)
4.2.3.1 Sampling. -The tests depicted in 4.3 shall be
performed on a compsite sample obtained by removing equal quantities
of lead azide from each batch of lead azide in the lot and mixing.
4.2.3.1.1 Preparation of the sample.-An equal portion
of lead azide shall be removed from each bag in the lot by
means of horn spoon to form a sample of approximately 100 grams
(NOTE: Samples may be taken from the agitated
(dry weight).
vessel before the lead azide is transferred from the vessel to
the shipping bag). The sample shall be blended on a smooth
surface by mixing with a horn spatula. Water shall be added in
case the sample appears dry. The sample shall be spread out
and divided into squares approximately 1/2 inch on a side, by
means of the spatula, small portions shall be taken from each
square to make a retained sample of approximately 50 grams
(dry weight). These portions, thoroughly wetted, shall be
transferred to a smooth-necked bottle, tightly stoppered with a
rubber stopper, and the stopper secured with adhesive tape.
This retained sample bottle shall be so labeled that the bag
from each lot from which the material was taken can be easily
The retained sample shall be held for possible
identified.
future examination (6 months minimum). The remaining portion of
the sample shall be used for testing. This sample, thoroughly
wetted, shall be transferred to a smooth-necked bottle tightly
stoppered with a rubber stopper and the stopper secured with
adhesive tape. The bottle shall be labeled to show the name
of the material, manufacturer, plant, contract or order number,
bag number, lot number and number of pounds in the lot. The
tests specified in 4.3 shall be performed on this sample. If
the sample fails to comply with the requirements specified herein,
the lot shall be rejected.
4.3 Test methods and procedures. -The following tests shall
be performed.
4.3.1 Color, Major defect, Defect Code No. 07001.-Observe
the color of the lead azide by visual examination.
4.3.2 Form, Major defect, Defect Code No. 08001.-Spread
a thin layer of the sample on a glass slide and allow to dry at
room temperature. Examine this material under a microscope using
a magnification of approximately 150.
4.3.3 Purity, Major defect, Defect Code No. 09001.-(N0TE:
Caution must be exercised. Evolution of hydrazoic acid which is
toxic but odorless occurs. Therefore, operations where the lead
azide is dissolved in an acid should be performed in a fume hood.)
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