Nitrating acid mixtures:
(a) 1796 nitrating acid mixture with more than 50 % nitric acid, 1826 nitrating acid mixture, spent with more than 50 % nitric acid;
(b) 1796 nitrating acid mixture with not more than 50 % nitric acid, 1826 nitrating acid mixture, spent with not more than 50 % nitric acid.
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