In crystallography, a crystallographic point group is a set of symmetry operations, corresponding to one of the point groups in three dimensions, such that each operation would leave the structure of a crystal unchanged i.e. Symmetry Tutorial - An interactive point group symmetry tutorial. Boiling Point: 65°C (149°F) @ 760 mm Hg Melting Point: -108.3°C (-162.9°F) Critical Temperature: 267°C (512.6°F) ... tetrachloride) directly to tetrahydrofuran will cause a violent exothermic reaction. CCRIS 3411. EINECS 237-881-8. The Symmetry Gallery - A collection of over 120 unique molecules and polyhedra with interactive display of all symmetry elements and animation of all operations. Polytetrahydrofuran is commonly prepared by acid-catalyzed polymerization of tetrahydrofuran. Application Tetrahydrofuran was used as a solvent in the formation of diacetylinic polymers. Flash point at 101 325 Pa provides substance information on the substance’s flash point at a temperature measured in °C at a pressure of 101 325 Pascal. Ecological information Ecotoxicity Do not empty into drains. Also incompatible with Calcium Hydride + heat, caustics (e.g. Type of study provided This section provides an overview of the type of study records behind the presented results and – if applicable - data waving justifications. 12. Borane tetrahydrofuran. The molecules are organized by point group… Tetrahydrofuran Revision Date 18-Jan-2018 Lower 2.0% Vapor Pressure 200 mbar @ 20 °C Vapor Density 2.5 (Ether = 1.0) Specific Gravity 0.880 Solubility miscible Partition coefficient; n-octanol/water No data available Autoignition Temperature 215 °C / 419 °F Decomposition Temperature No information available Viscosity 0.55 cP @ 20 °C Molecular Formula C4 H8 O Tetrahydrofuran (THF) is a saturated cyclic ether with a potential use as a biofuel. There is no NH 2 group added to tetrahydrofuran but they are presented in all derivatives of tetrahydrofuran. borane;oxolane. For amino tetrahydrofuran, the N–H stretching vibration is calculated at 3462 cm −1 while it is 3446 cm −1 for 1,2 where the origin is the fixed point. Tetrahydrofuran (THF) is commonly used as solvent, reaction medium, and starting material for various syntheses in the chemical industry, for example, for preparing adhesives, special paints, coatings, fibers, in the extraction of specific active substances, for recrystallization of certain compounds or as starting material for various syntheses in a number … The N–H stretching vibrations are normally viewed in the region 3300–3600 cm −1. Environmental: If released to the atmosphere, tetrahydrofuran will exist solely in the vapor phase and is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals and nitrate radicals with half-lives of about 1 and 3 days, respectively. Tetrahydrofuran. y = Mx. Its combustion studies have been investigated. Component Freshwater Algae Freshwater Fish Microtox Water Flea Tetrahydrofuran Not listed 2160 mg/l LC50 = 96 h Pimephales promelas LS-188441 Reports suggest that it is a better promoter than 1,3 dioxolane for CO 2-hydrate formation. the same kinds of atoms would be placed in similar positions as before the transformation.For example, in a primitive cubic crystal system, a … The starting material is natural gas, which is converted to acetylene, then reacted with formaldehyde to make butynediol and then butanediol. Tetrahydrofuran Group III Chemical Not applicable Not applicable Other Adverse Effects Tumorigenic effects have been reported in experimental animals. . Material Safety data sheet (MSDS) -Tetrahydrofuran 1. Supplier: Pon Pure Chemicals Group CHENNAI, TAMILNADU, INDIA 24 Hour Health Emergency (91) 8939878447 (91) 9444038694 Transportation Emergency Phone (91) 8939768680 ... (boiling point >65 °C, e. g. 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