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| Pyridinium tribromide Basic information |
| Pyridinium tribromide Chemical Properties |
| Melting point | 127-133 °C | | density | 2.9569 (rough estimate) | | refractive index | 1.6800 (estimate) | | storage temp. | Store at <= 20°C. | | solubility | soluble in Methanol | | form | Powder, Crystals and/or Chunks | | color | Red-orange to red to brown | | Water Solubility | decomposes | | Sensitive | Lachrymatory | | Merck | 14,7973 | | BRN | 3690144 | | Stability: | Stable. Incompatible with strong oxidizing agents, strong bases. | | InChIKey | YPCPFIMBGJOEKU-UHFFFAOYSA-O | | CAS DataBase Reference | 39416-48-3(CAS DataBase Reference) | | EPA Substance Registry System | Pyridinium hydrogen tribromide (39416-48-3) |
| Hazard Codes | C,Xi | | Risk Statements | 37/38-34-36 | | Safety Statements | 26-36/37/39-45-24/25-27 | | RIDADR | UN 3261 8/PG 2 | | WGK Germany | 3 | | F | 3 | | Hazard Note | Lachrymatory | | TSCA | Yes | | HazardClass | 8 | | PackingGroup | III | | HS Code | 29333100 |
| Pyridinium tribromide Usage And Synthesis |
| Chemical Properties | red crystals | | Uses | Pyridinium Tribromide is a reagent used in the α-thiocyanation of ketones and has also been applied to the synthesis of β-adrenergic blocking agents (also known as β-blockers) for patients with heart
failure. | | Uses | In small-scale brominations, where it is much more convenient and agreeable to measure and use than elemental bromine. | | Uses | Pyridine hydrobromide perbromide is used as a brominating reagent in alfa-bromination and alfa-thiocyanation of ketones, phenols, unsaturated and aromatic ethers. It is used as a raw material in the preparation of beta-adrenergic blocking agents. Furthermore, it is used as an analytical reagent. | | Purification Methods | It is a very good brominating agent-liberating one mol of Br2. Purify it by recrystallisation from glacial acetic acid (33g from 100mL of AcOH) to give orange-red crystals. [Fieser & Fieser Reagents for Organic Chemistry 1 967 1967, Englert & McElvain J Am Chem Soc 51 865 1929, Beilstein 20 II 103, 20/5 V 181.] |
| Pyridinium tribromide Preparation Products And Raw materials |
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