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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 ...
The sign is commonly referred to as a radioactivity warning sign, but it is actually a warning sign of ionizing radiation. Ionizing radiation is a much broader category than radioactivity alone, as many non-radioactive sources also emit potentially dangerous levels of ionizing radiation.
The European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR) fixed harmonised pictograms for transportation. Vehicles carrying dangerous goods have to be fitted with orange signs, where the lower number identifies the substance, while the upper number is a key for the threat it may pose.
A propane tank car after a fire, the HAZMAT 1075 symbol can be seen in red as a warning of the danger posed by the gas. A gas is a substance which (a) at 50 °C (122 °F) has a vapor pressure greater than 300 kPa (43.51 PSI) or
Recreational scuba divers commonly breathe nitrox containing up to 40% oxygen, while technical divers use pure oxygen or nitrox containing up to 80% oxygen to accelerate decompression. Divers who breathe oxygen fractions greater than of air (21%) need to be educated on the dangers of oxygen toxicity and how to manage the risk. [76]
Reacts with water in an unusual or dangerous manner (e.g., caesium, sodium, diborane, sulfuric acid). SA: Simple asphyxiant gas (specifically helium, nitrogen, neon, argon, krypton, and xenon). The SA symbol shall also be used for liquified carbon dioxide vapor withdrawal systems and where large quantities of dry ice are used in confined areas. [2]
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