2-HYDROXY-5-CHLOROBENZALDEHYDE
5-Chlorosalicylaldehyde
CAS: 635-93-8
Molecular Formula: C7H5ClO2
2-HYDROXY-5-CHLOROBENZALDEHYDE - Names and Identifiers
| Name | 5-Chlorosalicylaldehyde |
| Synonyms | AKOS 90774 5-Cl-salicylal 5-CL-SALICYLAL 5-Chlorosalicyladehyde 5-CHLOROSALICYLALDEHYDE 5-Chlorosalicylaldehyde 5-Chlorosalicylic aldehyde 5-Chloro-2-hydroxybenzaldehyde 2-HYDROXY-5-CHLOROBENZALDEHYDE 5-CHLORO-2-HYDROXYBENZALDEHYDE 5-Chloro-2-Hydroxybenzaldehyde (5-Chlorosalicylaldehyde) |
| CAS | 635-93-8 |
| EINECS | 211-244-4 |
| InChI | InChI=1/C7H5ClO2/c8-6-1-2-7(10)5(3-6)4-9/h1-4,10H |
2-HYDROXY-5-CHLOROBENZALDEHYDE - Physico-chemical Properties
| Molecular Formula | C7H5ClO2 |
| Molar Mass | 156.57 |
| Density | 1.2683 (rough estimate) |
| Melting Point | 100-102°C(lit.) |
| Boling Point | 217.69°C (rough estimate) |
| Flash Point | 92.2°C |
| Vapor Presure | 0.0477mmHg at 25°C |
| Appearance | white to yellowish crystalline powder |
| Color | White to very slightly yellow |
| BRN | 636632 |
| pKa | 7.73±0.18(Predicted) |
| Storage Condition | Keep in dark place,Sealed in dry,Room Temperature |
| Sensitive | Air Sensitive |
| Refractive Index | 1.5812 (estimate) |
| MDL | MFCD00003331 |
| Physical and Chemical Properties | White crystals. Melting point 99-100 °c. Soluble in alcohol, slightly soluble in water. |
| Use | Intermediates for organic synthesis such as pharmaceuticals, fragrances, and dyes |
2-HYDROXY-5-CHLOROBENZALDEHYDE - Risk and Safety
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S24/25 - Avoid contact with skin and eyes. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
| UN IDs | UN2811/6.1/PG III |
| WGK Germany | 3 |
| RTECS | VN5450000 |
| TSCA | Yes |
| HS Code | 29130000 |
| Hazard Note | Irritant |
2-HYDROXY-5-CHLOROBENZALDEHYDE - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| preparation | the purified chlorine gas is introduced into salicylaldehyde, and when the reaction solution turns bright yellow, the reaction is terminated, add 1 times the volume ratio of ethanol, heating to 60 deg C, cooling, slow precipitation of white crystals, Suction filtration, recrystallization of ethanol, 5-chlorosalicylaldehyde. |
| Use | This product forms a stable yellow Schiff base with amines, acting as a protecting group in peptide synthesis. Mainly used in medicine, spices and dyes and other organic synthesis intermediates. |
| production method | Salicylaldehyde is heated, chlorine is introduced, and the reaction solution is bright yellow. Ethanol was added to dissolve the product. After cooling, crystals were precipitated, filtered and dried to obtain 5-chlorosalicylaldehyde. |
Last Update：2024-04-09 15:16:52
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