Methylene chloride must be refrigerated until ready to use, not an explosive; used un calibration of devices used to detect explosives; which have nitrogen present
NSN 6240-01-064-5348
NSN 5905-01-472-3802
NSN 4140-00-827-1821
NSN 5910-00-929-5905
NSN 5985-01-493-3539
NSN 5905-01-300-8893
NSN 6610-01-376-9199
NSN 6220-01-063-4665
NSN 5985-01-659-2875
NSN 5895-01-647-6568
NSN 6240-01-539-8227
NSN 7035-01-583-9588