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 5905-00-731-3097
NSN 5855-01-515-7005
NSN 5915-00-597-0038
NSN 4140-01-157-8882
NSN 5975-00-146-1797
NSN 5925-01-377-2285
NSN 5945-01-615-3662
NSN 5996-00-285-3727
NSN 5985-00-636-2168
NSN 5990-01-546-1649
NSN 6110-00-244-2308
NSN 6135-01-596-3145