Calcium carbide is produced industrially in an electric arc furnace, from a mixture of calcium oxide and coke (or pure carbon) at approximately 2000 °C. Noteworthy, one of the co-authors of the new article is Mariia Sapova, a graduate of St Petersburg University, who started work on the project during her master’s studies. Used to make acetylene and in steel manufacture. However, normal steel cans are prone to rusting, which sometimes can be a good thing, as it is an indicator that the environment where the CaC2 is stored is too wet to be safe. It is capable of deprotonating not just water but also alcohols, evolving acetylene. Calcium acetylide was discovered more than 150 years ago. A good storage container is the common steel paint can. The carbide burns incandescently when mixed and heated with lead difluoride, magnesium, hydrogen chloride, and tin (II) chloride, [Mellor, 1946, 1940, 1946, and 1941], respectively. The powdered mixture of the acetylide and iron oxide and iron chloride burns violently upon ignition, producing molten iron. The research is a part of a project on the relevant chemistry of calcium acetylide funded by St Petersburg University. Purer samples can be found at lab suppliers. In case of a flood or water leak, any carbide that enters contact with water will release acetylene which, if it builds up may lead to explosion. Calcium acetylide is a salt containing negatively charged acidic residues of acetylene (the so-called acetylide anions with a charge of ‘?2’) and positively charged calcium ions. The so-formed anions, having a charge of ‘-1’, can undergo a wide range of key organic chemical reactions. In particular, to obtain calcium acetylide, you can use carbon that is obtained via thermal decomposition (pyrolysis) of waste, and the resulting substance can be used in industry to create new compounds,’ said Konstantin Rodygin, a research associate at the Laboratory of Cluster Catalysis, St Petersburg University. These function as the groundhog repellents and do not limit the hydrolysis of the carbide as one might think. Sci. As Mikhail Polynski specified, the newly presented research is purely theoretical; it is a computer simulation of the process of obtaining acetylides from calcium acetylide. Thus, chemical synthesis of new substances with calcium acetylide can be ‘greener’ due to the potential of calcium acetylide to react in less toxic solvents, as well as due to more sustainable approaches to the synthesis of the carbide itself’ said Mikhail Polynski, a co-author of the article, assistant teaching fellow at the Institute of Chemistry of St Petersburg University. Impure calcium carbide, such as technical grade type, also has other calcium compounds, like calcium sulfide, calcium nitride, calcium phosphide, which in contact with water it will also produce phosphine, ammonia or hydrogen sulfide. Calcium carbide is a solid chemical compound of calcium and carbon, with the formula CaC2, a carbide, that reacts with water to produce acetylene. Calcium acetylide was discovered more than 150 years ago. Reaction with water gives off toxic fumes, so it should be performed outside or in a fume hood; it also poses a fire hazard because of potential phosphine and diphosphane generated due to phosphorus impurities in commercial samples. Mixing calcium carbide with silver nitrate solutions forms silver acetylide, a highly sensitive explosive. The chemical characteristics of calcium carbide. National Oceanic and Atmospheric Administration. 5, 862]. (USCG, 1999). These samples are not very pure, and also have certain additives, biocides and perfumes, like 2-undecanone, citriodiol, coated on the surface of the boulders and inside the pores of the material. Never perform the neutralization in a closed chamber! The reaction of calcium carbide with water, producing acetylene and calcium hydroxide, was discovered by Friedrich Wöhler in 1862. The researchers investigated the acidity of acetylide anions, water, and some other … Calcium carbide is often referred to as simply carbide. With normal water reacting with calcium carbide to produce acetylene gas and calcium hydroxide, it does not appear that the slightly heavier D2O would be any different than H2O. Lower Explosive Limit (LEL): data unavailable, Upper Explosive Limit (UEL): data unavailable, Vapor Density (Relative to Air): data unavailable, Nitrides, Phosphides, Carbides, and Silicides, National Oceanic and Atmospheric Administration. Calcium carbide incandesces with chlorine, bromine, or iodine at 245, 350, or 305°C., respectively, [Mellor, 1946, Vol. In industry, it is widely used in the production of acetic acid and ethyl alcohol, as well as it can be used in the production of plastics, rubber, and rocket engines. 5, 862]. OTC calcium carbide used as rodent repellent, Except where otherwise noted, data are given for materials in their, https://www.sciencemadness.org/whisper/viewthread.php?tid=2492, http://www.hgxb.com.cn/EN/abstract/abstract14646.shtml, Calcium Carbide CaC2 - Acquisition, Uses and Synthesis, Synthesis of calcium carbide with electric arc, http://www.sciencemadness.org/smwiki/index.php?title=Calcium_carbide&oldid=13076, Articles containing unverified chemical infoboxes, GNU Free Documentation License 1.3 or later, Reacts with alcohols, carboxylic acids, mineral acids.