MIL-DTL-46225D
4.4 Conformance inspection.
4.4.1 Lot formation. Lot formation of lead azide shall be in accordance with the lot
formation requirements of MIL-STD-1916, paragraph "Formation and identification of lots and
batches".
a. A lot shall consist of one or more batches of lead azide produced by one
manufacturer in accordance with the same specification or same specification
revision under one set of operating conditions.
b. There shall be no intermixing of batches (see 6.12). Each batch shall be
identified with a batch identification number, name of manufacturer, date of
manufacture as well as dry weight of lead azide contained.
c. A new makeup of any one of the solutions (i.e., lead salt, sodium azide or
sodium CMC) constitutes the formation of a new lot.
4.5 Testing. (see 6.8 for precaution)
4.5.1 Sampling. The tests depicted in 4.6.1, 4.6.3 and 4.6.5 shall be performed on an
individual specimen from each batch. If any samples fail to comply with the requirements
specified herein, the batch shall be rejected. The tests depicted in 4.6.2 shall be performed on a
composite sample obtained by removing equal quantities of lead azide from each batch of lead
azide in the lot and mixing to form a composite sample.
4.5.1.1 Preparation of composite sample. The tests depicted in 4.6.2 shall be performed
on a composite sample from each lot. An equal portion of damp lead azide shall be removed
from each batch in the lot, by means of a conductive plastic spoon to form a sample of
approximately 25 grams (dry weight). (Note: Samples may be taken directly from the process
equipment or storage container). The sample shall be blended wet until uniform. Water shall be
added in case the sample appears dry. The sample, thoroughly wetted, shall be transferred to an
appropriate conductive container closed and secured with adhesive tape. The container shall be
labeled to show the name of the material, manufacturer, plant, lot number and quantity of
material in the lot. If the sample fails to comply with the requirements specified herein, the lot
shall be rejected.
4.6 Test methods and procedures. (see 6.10)
4.6.1 Physical characteristics.
4.6.1.1 Color. Determine the color of the lead azide by visual examination.
4.6.1.2 Bulk powder. Determine that the powder is free flowing by visual examination.
4.6.1.3 Particle size and shape. Spread a small portion of the wet or dry sample on a
clean glass slide so that approximately an area of one square inch is covered with a thin layer of
widely spaced particles. Allow wet samples to dry at room temperature. Examine under an
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