MIL-DTL-46225D
preclude the presence of fibrous material. The lead solution must be filtered until clear (i.e., no
suspension of lead carbonate) and must be stored in such a manner as to limit the formation of
lead carbonate due to atmospheric carbon dioxide contamination.
6.8.1 Waste lead azide. To safely dispose of small quantities of waste lead azide, add all
azide residues or contamination into 50 times its weight of 15 percent ceric ammonium nitrate
solution.
6.8.2 Purity precaution. Caution must be exercised. Evolution of hydrazoic acid (which is
toxic but odorless) occurs. Therefore, all operations where the lead azide is dissolved in an acid
should be performed in a fume hood.
6.8.3 Matter insoluble in nitric acid precaution. Caution must be exercised. In this test
the lead azide is dissolved in dilute nitric acid, a process which gives rise to the evolution of
hydrazoic acid gas which is toxic but odorless. Therefore, this operation should be done in a
fume hood.
6.8.4 Chloride, nitrates and acetates precaution. Caution must be exercised. All
operations should be performed in a fume hood.
6.8.5 Lead carboxymethyl cellulose precaution. Caution must be exercised. In this test the
lead azide is dissolved in glacial acetic acid, a process which gives rise to the evolution of
hydrazoic acid gas which is toxic but odorless. Therefore, this operation should be done in a
fume hood.
6.8.6 Aluminum charge plate procedure precaution. Perform this test behind a properly
barricaded and grounded area and limit the quantity of lead azide in the area to only that which is
going to be tested.
6.8.7 Measuring cup procedure. Perform this test behind a properly barricaded and
grounded area and limit the quantity of lead azide in the area to only that which is going to be
tested.
6.9 Water/alcohol. Due to danger of freezing conditions during shipment and storage, this
material should be kept "wet' with a 50/50 solution of water/denatured ethanol.
6.10 Test deviations. Any deviations from the test and/or sampling procedures specified
herein require prior approval by the procuring activity.
6.11 Purity method validation. It is recommended to test the method first on a sample of
commercially prepared high purity sodium azide. Substitute 6.5 for 14.56 in the formula as
specified in 4.6.2.1.4. A value of 100 ± 0.5 % recovery inspires confidence in the values used
for normality and CAN/FP ratio. Weight (W) is the weight of the sodium azide sample in grams
for the validation test.
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