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5-Chlorosalicylaldehyde Basic information Product Name: 5-Chlorosalicylaldehyde Synonyms: 5-CHLOROSALICYLALDEHYDE;5-Chlorosalicylic aldehyde;5-CHLORO-2-HYDROXYBENZALDEHYDE;2-HYDROXY-5-CHLOROBENZALDEHYDE;AKOS 90774;5-Chlorosalicyladehyde;5-Cl-salicylal;5-Chloro-2-Hydroxybenzaldehyde (5-Chlorosalicylaldehyde) CAS: 635-93-8 MF: C7H5ClO2 MW: 156.57 EINECS: 211-244-4 Product Categories: Aromatic Aldehydes & Derivatives (substituted);Benzaldehyde;Adehydes, Acetals & Ketones;Chlorine Compounds;Phenols;Aldehydes;FINE Chemical & INTERMEDIATES;Alcohols and Derivatives;Carbonyl Compounds;C7;Carbonyl Compounds Mol File: 635-93-8.mol   5-Chlorosalicylaldehyde Chemical Properties Melting point 100-102 °C(lit.) Boiling point 217.69°C (rough estimate) density 1.2683 (rough estimate) refractive index 1.5812 (estimate) pka 7.73±0.18(Predicted) form Crystalline Powder color White to very slightly yellow Sensitive Air Sensitive BRN 636632 CAS DataBase Reference 635-93-8(CAS DataBase Reference) NIST Chemistry Reference 5-Chloro-2-hydroxy benzaldehyde(635-93-8) EPA Substance Registry System Benzaldehyde, 5-chloro-2-hydroxy- (635-93-8)   Safety Information Hazard Codes Xi,Xn Risk Statements 36/37/38-20/21/22 Safety Statements 26-36-24/25-36/37/39 RIDADR UN2811/6.1/PG III WGK Germany 3 RTECS VN5450000 Hazard Note Irritant TSCA Yes HS Code 29130000 MSDS Information Provider Language 5-Chlorosalicylic aldehyde English SigmaAldrich English ACROS English ALFA English   5-Chlorosalicylaldehyde Usage And Synthesis Chemical Properties white to very slightly yellow crystalline powder Synthesis Reference(s) Synthetic Communications, 20, p. 609, 1990 DOI: 10.1080/00397919008244911 Tetrahedron Letters, 15, p. 3463, 1974 Purification Methods Steam distil it, then crystallise it from aqueous EtOH or *C6H6 (m 100o). It forms complexes with Cu2+ and Fe2+ . [Beilstein 8 H 53, 8 II 45, 8 III 181, 8 IV 224.]   5-Chlorosalicylaldehyde Preparation Products And Raw materials Raw materials Salicylaldehyde Preparation Products 5-CHLOROBENZOFURAN-2-CARBOXYLIC ACID-->5-CHLORO-BENZOFURAN-2-CARBOXYLIC ACID ETHYL ESTER-->6-CHLORO-2-OXO-2H-CHROMENE-3-CARBOXYLIC ACID