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Skull and crossbones, a common symbol for poison and other sources of lethal danger (GHS hazard pictograms). Hazard symbols are recognizable symbols designed to warn about hazardous or dangerous materials, locations, or objects, including electromagnetic fields, electric currents; harsh, toxic or unstable chemicals (acids, poisons, explosives); and radioactivity.
Alternative sign. Division 2.1 Non-flammable non-toxic gases – Gases which: are asphyxiant – gases which dilute or replace the oxygen normally in the atmosphere; or; are oxidizing – gases which may, generally by providing oxygen, cause or contribute to the combustion of other material more than air does; or; do not come under the other ...
Radioactive material, excepted package-instruments or articles UN 2912: 7: Radioactive material, low specific activity (LSA-I) [non fissile or fissile-excepted] Radon gas UN 2913: 7: Radioactive material, surface contaminated objects (SCO-I or SCO-II) [non fissile or fissile-excepted] UN 2914-(UN No. no longer in use) UN 2915: 7: Radioactive ...
Proposed pictogram warning of the dangers of buried nuclear waste for the Waste Isolation Pilot Plant. Long-term nuclear waste warning messages are communication attempts intended to deter human intrusion at nuclear waste repositories in the far future, within or above the order of magnitude of 10,000 years.
Hazardous Materials Class 4.3 : Dangerous when Wet 4.3 Dangerous when Wet : Solid substances that emit a flammable gas when wet or react violently with water ( sodium , calcium , potassium , calcium carbide ).
Most plutonium and other radioactive material is in concrete or steel structures or underground. And many sites are remote, where public risk likely would be minimal. Still, potential threats have ...
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