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 5960-01-512-0233
NSN 5998-01-265-1366
NSN 5975-01-090-1062
NSN 5910-00-082-1824
NSN 5935-00-805-5965
NSN 5990-01-426-7350
NSN 5915-01-115-0809
NSN 5990-00-150-6979
NSN 5925-00-271-8836
NSN 5975-01-038-0596
NSN 6240-01-097-4722
NSN 6145-01-599-9466