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Chromium Trioxide
Jone′s reagent · Jones reagent, 1.90 - 2.20 M · Jone's reagent ~2% CrO3 basis · Sulfuric acid-chromium trioxide mixture · Chromium trioxide solution in sulfuric acid · Sulfuric acid, mixt. with chromium oxide (CrO3)
Identifikatoren & physikalische Daten
| CAS No. | 1333-82-0 |
|---|---|
| Summenformel | CrO3 |
| Durchschnittliche Molmasse | 99,994 g/mol |
| Monoisotopische Masse | 99,92525136 g/mol |
| SMILES | [O]=[Cr](=[O])=[O] |
| InChIKey | WGLPBDUCMAPZCE-UHFFFAOYSA-N |
| PubChem CID | 14915 |
| ChEBI | CHEBI:48240 |
| EC No. | 215-607-8 |
| DTXSID | DTXSID0040125 |
Chemische & physikalische Eigenschaften
| Polarare Oberfläche (TPSA) | 51,2 |
|---|---|
| H-Brücken-Donoren | 0 |
| H-Brücken-Akzeptoren | 3 |
| Frei drehbare Bindungen | 0 |
| Schwere Atome | 4 |
| Formalladung | 0 |
| Komplexität | 61,8 |
| Stoffklassen | Metals -> Chromium Compounds, InorganicCarcinogens |
| pH | Dissolves in water to form a weak acid |
| Geruch | Odorless |
| Dichte | 2.7 (NTP, 1992) - Denser than waterwill sink2.702.7 g/cm³2.70 @25 °C2.70 (CrO3)1.298 g/mL at 25 °C |
| Color/Form | Dark red, bipyramidal prismatic crystals, flakes or granular powderBrown solidFlake, ground powder formDark-red ... flakes or powder [Note: Often used in an aqueous solution (H2CrO4)] |
| Löslichkeit | Very soluble (NTP, 1992)Solubility in water, 61.7 g/100 cc solution at 0 °C67.45 g/100 cc solution at 100 °CIn water, 169 g/100 g water at 25 °CIn water, 1667 g/L (EU Method A.6 (Water Solubility))In water, 167.299 lb/100 lb water at 70 °FSoluble in ethyl alcohol, ethyl ether, sulfuric and nitric acids |
| Siedepunkt | 482 °F at 760 mmHg (decomposes) (NTP, 1992)Approximately 250 °C decomposes482 °F (Decomposes) |
| Decomposition | Decomposes when heated to 250 °C, liberating oxygen to support combustion.Decomposes at 250 °C to chromic oxide and oxygenDecomposes at 250 °C with release of oxygen |
| Schmelzpunkt | 385 °F (NTP, 1992)197 °C387 °F (Decomposes) |
| Dampfdruck | Very low (NIOSH, 2024) |
| Physical Description | Chromium trioxide, anhydrous appears as a dark purplish red solid. Under prolonged exposure to fire or heat the containers may explode. Highly toxic. A confirmed human carcinogen.LiquidOther SolidDry PowderLarge CrystalsDark red to brown crystals, flakes, or powder[HSDB] Soluble in water[ACGIH]ODOURLESS DARK RED DELIQUESCENT CRYSTALS, FLAKES OR GRANULAR POWDER.CrO3: Dark-red, odorless flakes or powder. [Note: Often used in an aqueous solution (H2CrO4).] |
| Stability/Shelf Life | Stable under recommended storage conditions.Trivalent chromium is the most stable oxidation state and hexavalent chromium is the second most stable state. /Trivalent and hexavalent chromium/ |
| Lagerbedingungen | -20°C |
| Aggregatzustand | liquid |
| InChI | 1S/Cr.H2O4S.3O/c1-5(2,3)4/h(H2,1,2,3,4) |
| InChIKey | HNPXHFOTGAXAJY-UHFFFAOYSA-N |
| SMILES | O=[Cr](=O)=O.OS(O)(=O)=O |
Sicherheit & Vorschriften
| GHS-Einstufung | DangerH271 (100%): May cause fire or explosionstrong Oxidizer [Danger Oxidizing liquidsOxidizing solids]P203, P210, P220, P233, P260, P261, P262, P264, P264+P265, P270, P271, P272, P273, P280, P283, P284, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P306+P360, P316, P317, P318, P319, P320, P321, P330, P333+P317, P342+P316, P361+P364, P362+P364, P363, P370+P378, P371+P380+P375, P391, P403, P403+P233, P405, P420, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 638 reports by companies from 40 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies. |
|---|---|
| Regulatorische Informationen | Chemical: Chromium oxide (CrO3)Hazard Traits - CarcinogenicityGenotoxicityRespiratory ToxicityChromium oxide (CrO3) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Chromium oxide (CrO3) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)R - indicates a substance that is the subject of a TSCA section 6 risk management rule.Status: Active Update: 25-10-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/15927Substance: Chromium trioxide |
| Weitere Sicherheitsinformationen | IMAP assessments - Chromium trioxide and related compounds: Human health tier II assessment |
| DOT-Kennzeichnung | Oxidizer Poison Corrosive |
| Brandgefahren | Behavior in Fire: Containers may explode (USCG, 1999)· These substances will accelerate burning when involved in a fire.Not combustible but enhances combustion of other substances. Many reactions may cause fire or explosion. |
| Brandpotenzial | Powerful oxidizer ... contact with combustible material may cause fire.Ignites on contact with alcohols, acetic anhydride + tetrahydronaphthalene, acetone, butanol, chromium(II) sulfide, cyclohexanol, dimethyl formamide, ethanol, ethylene glycol, methanol, 2-propanol, pyridine. |
Anwendungen & Verwendung
Beschreibung
Jones Reagent (EDTA methidiumpropylamide) is mixture of chromium trioxide in sulfuric acid which is used for Jones oxidation, typically with acetone as the solvent. Jones oxidation reactions are not commonly used anymore due to the toxicity of chromium (VI) reagents.