The orange sticker is a fire symbol that indicates mass detonating explosive (1.1 D). The "D" marking indicates the compatibility group for the explosive.
Soldiers who took a 5 EYEWITNESS NEWS crew into
bunkers on April 18 said some of the boxes
uncovered contained proximity fuses. (Photos 5 Eyewitness News) http://www.kstp.com/article/stories/S3723.html?cat=1
1. The fiberboard barrels are a 1.1D hazardous substance vs. a hazardous finished material. The difference between the definitions of a substance and material is somewhat important. The substance is quite stable otherwise it wouldn't be in fiberboard barrels packing group III.
2. I suspect the boosters UN0042 were stored with the barrels in the same bunker due to compatibility (The "D" in the hazard classification") Those boxes in the still pictures are NOT, NOT proximity fuses. They are Boosters.
3. The plastic box with the plastic cylinders appear to be 60mm Mortar Rounds packaged as the Germans do. I suspect they are of German origin. Also stored in the same bunker due to hazard classification compatibility.
4. The 6 label is definitely a toxic inhalation hazard. I've never seen an X before. They are always in zones A, B, C or D. That is internationally. The label is probably a subsidiary (secondary) risk label of another primary risk. * This is rare for a munition.
5. The barreled substance and the boosters look like typical mining/quarrying operations materials. Example Bore a hole,pour the substance down the hole, prime the booster with a cap,lower the booster into the hole full of substance, let 'er rip.
THE ONLY 1.1D BLASTING AGENT IN A DRY FORM THAT HAS A SUBSIDIARY HAZARD CLASS OF 6. (Toxic Inhalation Hazard) IS;
DINITROPHENOL UN0076
Amazingly it has the same physical characteristics as those shown in the picture.
There is one other 1.1D/6 but that is a liquid and is also in the nitro family - Nitroglycerine.
Dinitrophenol is a blasting agent commonly used in "melt and pour" operations when manufacturing explosives.
I'm not an expert, but I did stay at a Holiday Inn Express last night.