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The white "special notice" area can contain several symbols. The following symbols are defined by the NFPA 704 standard. OX: Oxidizer, allows chemicals to burn without an air supply (e.g., potassium perchlorate, ammonium nitrate, hydrogen peroxide). W: Reacts with water in an unusual or dangerous manner (e.g., caesium, sodium, diborane ...
Strong acids/bases (nitric acid, sodium hydroxide), calcium oxide, anhydrous zinc chloride can be corrosive GHS05: Corrosive Explosives, divisions 1.5, 1.6; Flammable gases, category 2; Self-reactive substances and mixtures, type G (see HAZMAT Class 4 Flammable solids) Organic peroxides, type G; no pictogram required
A BLEVE–fireball at the Philadelphia Energy Solutions refinery, as rendered by the CSB. A boiling liquid expanding vapor explosion (BLEVE, / ˈ b l ɛ v iː / BLEV-ee) is an explosion caused by the rupture of a vessel containing a pressurized liquid that is or has reached a temperature sufficiently higher than its boiling point at atmospheric pressure.
ISO 7010 states on all symbols with a first aid cross, that it "may be replaced with another element appropriate to cultural requirements". In countries with a Muslim -majority population, an appropriate symbol is the crescent .
The symbol was adopted as a standard in the US by ANSI in 1969. [6] [8] It was first documented as an international symbol in 1963 in International Organization for Standardization (ISO) recommendation R.361. [9] In 1974, after approval by national standards bodies, the symbol became an international standard as ISO 361 Basic ionizing radiation ...
In contact with water releases flammable gases which may ignite spontaneously H261: In contact with water releases flammable gas H270: May cause or intensify fire: oxidizer H271: May cause fire or explosion: strong oxidizer H272: May intensify fire: OXIDISER H280: Contains gas under pressure: may explode if heated H281
Littoral explosion at Waikupanaha ocean entry at the big island of Hawaii was caused by the lava entering the ocean. A steam explosion is an explosion caused by violent boiling or flashing of water or ice into steam, occurring when water or ice is either superheated, rapidly heated by fine hot debris produced within it, or heated by the interaction of molten metals (as in a fuel–coolant ...
The previous hazard symbols for chemicals, were introduced in the Directive Directive 67/548/EEC, in 1967, and required to be adopted no later than 1 January 1970. [6] The symbols were also included as a part of Directive 1999/45/EC. [7] The symbols were replaced from 1 December 2010 to 1 June 2017, via a gradual phaseout. [1]