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- Water-reactive substances are those that spontaneously undergo a chemical reaction with water, as they are highly reducing in nature. Notable examples include alkali metals, lithium through caesium, and alkaline earth metals, magnesium through barium. Some water-reactive substances are also pyrophoric, like organometallics and sulphuric acid, and should be kept away from moisture. The use of acid-resistant gloves and face shield are required and should be handled in fume hoods. Such substances are classified as R2 under the UN classification system and as Hazard 4.3 by the United States Department of Transportation. In an NFPA 704 fire diamond's white square, they are denoted as "W̶". All chemicals that react vigorously with water or liberate toxic gas when in contact with water are recognized for their hazardous nature in the 'Approved Supply List,' or the list of substances covered by the international legislation on major hazards many of which are commonly used in manufacturing processes. (en)
- 禁水性物質（きんすいせいぶっしつ）は、水との接触により発火や発熱、可燃性ガスの発生など、従前より危険な状態になる性質を持つ物質である。日本の消防法では自然発火性物質とともに第3類危険物に区分される。 (ja)
- 遇水易燃（又稱遇水致燃、遇湿易燃，有時稱為「遇水放出易燃气体的物质」），是一種，一般指某種物質能與水發生危險的化學反應。 (zh)
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- 6986 (xsd:nonNegativeInteger)
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- 禁水性物質（きんすいせいぶっしつ）は、水との接触により発火や発熱、可燃性ガスの発生など、従前より危険な状態になる性質を持つ物質である。日本の消防法では自然発火性物質とともに第3類危険物に区分される。 (ja)
- 遇水易燃（又稱遇水致燃、遇湿易燃，有時稱為「遇水放出易燃气体的物质」），是一種，一般指某種物質能與水發生危險的化學反應。 (zh)
- Water-reactive substances are those that spontaneously undergo a chemical reaction with water, as they are highly reducing in nature. Notable examples include alkali metals, lithium through caesium, and alkaline earth metals, magnesium through barium. Some water-reactive substances are also pyrophoric, like organometallics and sulphuric acid, and should be kept away from moisture. The use of acid-resistant gloves and face shield are required and should be handled in fume hoods. (en)
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- 禁水性物質 (ja)
- Water-reactive substances (en)
- 遇水易燃 (zh)
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