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What is dangerous when wet material?
What color should a dangerous when wet placard be?
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Dangerous when wet material is material that, by contact with water, is liable to become spontaneously flammable or to give off flammable or toxic gas at a rate greater than 1 liter per kilogram of the material, per hour, when tested in accordance with the UN Manual of Tests and Criteria.
In addition to complying with 49 CFR §172.519, the background color on the DANGEROUS WHEN WET placard must be blue. The letters in the words “WHEN WET” must be at least 25 mm (1.0 inches) high. The symbol, text, class number and inner border must be white. The placards must be as follows:
May 19, 2019 · The red and white striped sign indicates a flammable solid. The half white, half red sign indicates that a material could spontaneously combust. A dangerous when wet sign, which is blue, indicates that a material could suddenly become flammable or emit toxic gas if exposed to water. Oxidizer and Organic Peroxide: This class includes two ...
8.5 Dangerous When Wet. Dangerous when wet compounds react violently with water to form toxic vapors and/or flammable gases that can ignite and cause a fire. Please note: attempting to put out a fire involving dangerous when wet materials with water will only make the situation worse.
dangerous when wet ..... organic peroxide ..... poison inhalation hazard..... radioactive1..... 1.1..... 1.2.....
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Hazard pictograms are one of the key elements for the labelling of containers under the GHS, along with: [2] an identification of the product; a signal word – either Danger or Warning – where necessary. hazard statements, indicating the nature and degree of the risks posed by the product.
They are often referred to as 'dangerous when wet'. Packing groups. Classes 4.1, 4.2 and 4.3 have been assigned a packing group which indicates the degree of danger. Packing Group I: Substances presenting high danger. Packing Group II: Substances presenting medium danger. Packing Group III: Substances presenting low danger.
