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 6150-01-420-5987
NSN 5920-01-595-6588
NSN 6620-01-184-9210
NSN 6650-01-512-1316
NSN 5975-00-824-4354
NSN 6110-01-307-1390
NSN 5975-01-024-8486
NSN 6650-00-840-9758
NSN 5945-01-199-9108
NSN 5950-00-186-9796
NSN 6650-01-395-5991
NSN 6130-01-426-8841