Not until 1830 did chemists think to use picric acid as an explosive. Can ignite and burn if dried out. Picric acid is a strong irritant and allergen that causes local, These materials may detonate when subjected to heat, friction, or impact inducing an explosion in the unreacted picric acid. The picric acid exploded with enough force to blow out a large section of the plants flat truss roof and concrete walls. The conversion of surplus picric acid and/or ammonium picrate (Explosive D) to 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) has been subject of extensive process development studies at Lawrence Livermore National Laboratory (LLNL). The resultant cataclysmic explosion was the largest man made detonation until the nuclear bomb. 2 C6H3N3O7 (s) 3 N2 (g) + 11 CO (g) + 3 H2O (g) + C (s) a. The hazards posed by picric acid require special precautions and practices, described below, for storage and handling. Reactivity Profile. Picric acid is stored under water and is not considered an explosion hazard while wet. The moistened solid is classified as a flammable solid. Men were tossed up into the air, clothes torn from their bodies, (and their skin was yellow from the picric acid used in the manufacture). Picric Acid (Trinitrophenol or 2,4,6-Trinitrophenol) Explosion hazard when dry CAS number 88-89-1 Date Occurred 23rd May 2007 WHAT HAPPENED A disposal request was received for a 500 gram jar of picric acid that had dried out. Alternatively, the amine can be dissolved in alcohol and aqueous picric acid added. The Halifax Explosion. The buildings away from the picric acid were heated, surprisingly, by open coal fues. Accident: 201771698 - Five Employees Burned From Chemical Explosion. Recommended Use and Restrictions on Use General Laboratory Reagent 1.3. Picric acid readily forms salts on contact with many metals (including copper, Why picric acid is explosive? However in addition to its toxicity, picric acid can present a risk of explosion when encountered as a dry solid (in particular when crystalline). Its IUPAC name is 2,4,6-trinitrophenol (TNP). 8.1 Explosives. Anhydrous Picric acid is similar to TNT. The production of solid carbon by this reaction gives the explosion a sooty appearance. Dermal contact and subsequent systemic exposure is exacerbated by open wounds. From New York Times bestselling author John U. Bacon, a gripping narrative history of the largest manmade detonation prior to Hiroshima: in 1917 a ship laden with the most explosives ever packed on a vessel sailed out of Brooklyns harbor for the battlegrounds of World War I; when it stopped in Halifax, Nova Scotia, an extraordinary disaster awaited. Picric Acid must be stored under distilled water, and the bottle threads and cap must be kept free of any picric acid (either in solution or crystalized). Its IUPAC name is 2,4,6-trinitrophenol (TNP).The name "picric" comes from Greek: (pikros), meaning "bitter", due to its bitter taste.It is one of the most acidic phenols.Like other strongly nitrated organic compounds, picric acid is an explosive, which is its primary use.It has also been used as Picric acid CAS RN:88-89-1 This WISER content is available in multiple languages. Why is picric acid used in treatment of burns? Picric acid has antiseptic and astringent properties. For medical use it is incorporated in a surface anesthetic ointment or solution and in burn ointments. Picric acid is a much stronger acid than phenol; it decomposes carbonates and may be titrated with bases. Picric acid is a strong irritant and allergen that causes local, On December 6, 1917, an ammunition ship in Nova Scotia carrying 2,300 tons of picric acid as well as 400,000 pounds of TNT caught fire and exploded. Explosion Hazards When hydrated, picric acid is a typically safe to handle, but it becomes a powerful explosive when dry (less than 10% water). Unknown to the workers, the organic materials in the capacitors apparently reacted with the acid to create picric acid, an explosive compound. Picric Acid, Saturated Safety Data Sheet according to Federal Register / Vol. Dry picric acid is highly sensitive to heat, shock, and friction. Picric Acid- Acetone Solution 0.1% Safety Data Sheet Rev. What household chemicals can make an explosion? Explosions can occur due impact or friction (such as bottle screw threads) on the surface of dry picric acid crystals. I have a jar of wet solid picric that is probably 20 years old. After the explosion, the container is The combined nitrogen present in these forms is on explosion mainly liberated as elemental gaseous nitrogen. 14TH Edition, Quincy, MA 2010. The Halifax Explosion, History's Largest Explosion Before A material either a pure single substance or mixture of substances which is capable of producing an explosion by its own energy. A news story about a bottle of explosive Picric Acid being found in a chem lab one night. What household chemicals can make an explosion? The Low Moor Explosion was a fire and a series of explosions at a munitions factory in Low Moor, Bradford, West Riding of Yorkshire in August 1916. A shock-insensitive explosive compound that forms shock-sensitive explosive salts with metals (such as lead) is too unwieldy for most usual applications. quoting the MoD 2005 report. Dry picric acid is highly sensitive to heat, shock, and friction. Explanation. Heat built up in confined spaces when large quantities burn can cause detonation. Blasting explosive Cylindrical form wrapped in waterproof papers and stamped with makers name; Gun powder Black, brown, or grey color available in cylindrical, grain, or powder form. Picric acid was first obtained in 1771 by Peter Woulfe, a British chemist, by treating indigo with . A picric acid explosion occurs according to the following balanced decomposition reaction. Picric acid is an organic compound with the formula (O2N)3C6H2OH. Humidity EXPLOSIVES Explosive Is any substance that may cause an explosion by its sudden decomposition or combustion. CHEMICAL DANGERS: May explosively decompose on shock, friction, or concussion. Reports coming out of Beirut suggest that a quarter million people are homeless due to the explosion. NFPA National Fire Protection Association; Fire Protection Guide to Hazardous Materials. Picric acid is not compatible with metals which include copper, The workers here produced picric acid which was a vital component in the explosives that was needed for the war effort. PICRIC ACID (2, 4, 6-TRINITROPHENOL ; PICRONITRIC ACID) 3602.00.00 145. It is supplied with not 1903.06.18 explosion. Potential Explosion Hazards When hydrated, picric acid is a typically safe to handle, but it becomes a powerful explosive when dry (less than 10% water). One way to compensate this yield loss in oxygen-poor explosives is to mix them with an oxidiser, usually an oxygen-rich substance such as K C l O X 3. the French ship on fire and the ship erupted into the largest explosion yet created by man. It is ridiculous to restrict the use of picric acid if the most basic laboratory precautions are followed. The structure and molar mass are very similar to TNT, but replacing the methyl group with a hydroxyl means the oxygen content of picric acid is higher. 872-73. Special Remarks on Explosion Hazards picric acid and concrete floors leads to the formation of explosion-sensitive salts, such as calcium picrate. The hot nitric acid was used to remove some of the epoxy resin encapsulant from a tantalum anode. Picric acid (CAS No. The moistened solid is classified as a flammable solid. picric acid can be handled safely, but it poses a potential explosion hazard when it dries. Now, on to picric acid. Additionally, picric acid reacts vigorously with a variety of materials and is toxic to humans through all routes of entry [ 1 ]. ; Picric acid and picrates Yellow crystalline or powder form. A small steel process tank was filled with multiple metal baskets of tantalum capacitors cooked overnight in hot nitric acid. Explosion Hazard: If allowed to dry, picric acid can become shock sensitive and explosive as it is a flammable solid. Halifax explosion, also called Halifax explosion of 1917 or the Great Halifax Explosion, devastating explosion on December 6, 1917, that occurred when a munitions ship blew up in the harbour of Halifax, Nova Scotia, Canada. The collision ruptured the benzol barrels on deck and caused a leak into the hold containing the picric acid. The hot nitric acid was used to remove some of the epoxy resin encapsulant from a tantalum anode. December 6, 1917. Dry picric acid is highly sensitive to heat, shock, and friction. Picric acid (C6H3N3O7) is a dangerous explosive. Ammonia and metals with picric acid give results similar to bases. in pharmaceutical applications. Slow-mo explosion of Picric Acid at Meadows Field. Picric acid is an organic chemical compound, a bright yellow explosive. Normally, water is added to picric acid, otherwise the dry material is a touch sensitive explosive. Picric Acid Solution, Saturated, for AOAC Method 920.106 for Gelatin in Milk and Milk Products, Qualitative Test SP9200 SP9200-100, SP9200-50 1.2. At CSM picric may be used as a metal etchant and as a chemical reagent in teaching and synthesis labs. 1, respectively. Acid Room Shortly After the Explosion. In Beirut, this is definitely going to be a Picric acid is in the same family of nitroaromatic explosives as trinitrotoluene (TNT). But picric acid also had a benign side during the first world war. The ship that destroyed the city.
During the First World War, the United States became the reserve arsenal of the Entente and by December of the 17th year, 7 Federal OSHA: The initial OSHA investigation found residual explosive nitrated compounds using a Unauthorized use or copying is prohibited. H201 Explosive; mass explosion hazard H228: Flammable solid H241: Heating may cause a fire or explosion.
Hazard statement H201 Explosive; mass explosion hazard H331 Toxic if inhaled H311 Toxic in contact with skin H301 Toxic if swallowed Signal words DANGER * Implemented in the EU on 20 January 2009 1 Properties. I thank Assoc. The most powerful explosion of the pre-atomic era, which claimed four thousand lives. Potential Explosion Hazards When hydrated, picric acid is a typically safe to handle, but it becomes a powerful explosive when dry (less than 10% water). Picric Acid is explosive when dry (<10% moisture content). These acid crystals are highly volatile and explode readily under friction or a change in temperature. The crystals react with metals and alkaline materials very easily, such as contrete, to form an explosive picrate salt this particular salt caused booms that were bigger than TNT. Nearly 2,000 people died and some 9,000 were injured in the disaster, which flattened more than 1 square mile (2.5 square km) of the city of Halifax. Few of those on shore knew of the Mont Blancs explosive cargo; it carried 5.85 million pounds of explosives, including picric acid, TNT, gun cotton, and benzol.