5-(4-Dimethylaminobenzaldehyde)rhodanine
5-(4-Dimethylaminobenzylidene)rhodanine
CAS: 536-17-4
Molecular Formula: C12H12N2OS2
5-(4-Dimethylaminobenzaldehyde)rhodanine - Names and Identifiers
5-(4-Dimethylaminobenzaldehyde)rhodanine - Physico-chemical Properties
| Molecular Formula | C12H12N2OS2 |
| Molar Mass | 264.37 |
| Density | 1.36±0.1 g/cm3 (20 ºC 760 Torr) |
| Melting Point | 285-288°C(lit.) |
| Water Solubility | Insoluble in water, 993.7(mg/L) at 25°C |
| Solubility | Soluble in strong acid is yellow, soluble in acetone, slightly soluble in boiling ethanol, slightly soluble in chloroform, ether and benzene, almost insoluble in water |
| Appearance | Deep red crystal |
| Color | Red |
| Merck | 14,3231 |
| BRN | 189065 |
| pKa | 8.17±0.30(Predicted) |
| Storage Condition | Store below +30°C. |
| Refractive Index | 1.5950 (estimate) |
| MDL | MFCD00064857 |
| Use | Used as a reagent for testing small amounts of silver, mercury, copper, gold, platinum, palladium |
5-(4-Dimethylaminobenzaldehyde)rhodanine - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. S36/37 - Wear suitable protective clothing and gloves. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| WGK Germany | 3 |
| RTECS | VI8090000 |
| TSCA | Yes |
| HS Code | 29349990 |
| Hazard Class | IRRITANT |
5-(4-Dimethylaminobenzaldehyde)rhodanine - Introduction
Organic sensitive reagent, photometric determination of silver, gold, mercury, platinum, palladium.
Last Update：2022-10-16 17:26:01
5-(4-Dimethylaminobenzaldehyde)rhodanine - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | rose red silver reagent is also called p-dimethylaminobenzylidene rose red, which is a red fluffy powder with a melting point of 285- 288 ℃. Soluble in strong acid, slightly soluble in ethanol, ether and acetone, insoluble in water. |
| use | test yinling can be used to detect Ag, Au, Cu, Hg, Pd, Pt, alkaloid (alkaloids), antipyrine, urine blue mother (indican), ammonium sulfate and urobilinogen. Used as a reagent for testing small amounts of silver, mercury, copper, gold, platinum, and palladium Organic sensitive reagents, photometric determination of silver, gold, mercury, platinum, palladium used to detect Ag, Au, Cu, Hg, Pd, Pt, alkaloids (alkaloids), antipyrine, urinary blue mother (indican), ammonium sulfate and urobilinogen (urobilinogen) are mainly reagents 1,2 for the determination of silver, palladium and mercury; used for photometric determination of autoradiography 4. References: 1. G.H. Ayres et al. Anal. Chim. Acta 24, 241, (1961)2. G. Jangg Fresenius J. Anal. Chem. 183, 255, (1961)3. L.E. Lichtenstein Anal. Chem. 47, 465, (1975)4. J.W. Ludlow et al. Anal. Biochem. 154, 104, (1986) abstract |
| production method | 1. pour carbon disulfide ethanol solution at 5 ℃ into ammonia-ethanol solution at 5 ℃, stir fully, let stand, and filter after precipitation is complete. Wash the precipitate with ether for later use. The aqueous solution of monochloroacetic acid is cooled with sodium carbonate to adjust the ph value to 7~8 to below 10 ℃, and the above-mentioned fresh precipitate is added in a small amount under stirring, and the temperature is controlled below 20 ℃. After cooling, let it stand, filter, and add the filtrate to boil In the hydrochloric acid aqueous solution, heat to 95 ℃, cool, filter, and recrystallize the crystallization with glacial acetic acid once, and obtain Luo Danin: the prepared rodanine and p-dimethylaminobenzaldehyde are dissolved in acetic acid in a theoretical ratio, heated and refluxed for 1~2h: water or ethanol is added to precipitate the product p-dimethylaminopenexylrodanine, stand and filter, the crystallization is washed and dried with water, and then recrystallized and purified with boiling ethanol. |
Last Update：2024-04-09 20:45:29
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Product Name: 5-(4-DIMETHYLAMINOBENZYLIDENE)RHODANINE Request for quotation
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