1-(2-Hydroxycarbonyl-phenyl)-5-(2-Hydroxy-5-sulfophenyl)-3-phenylformazan,sodiumsalt
sodium hydrogen 2-[1-(2-hydroxy-5-sulphonatophenyl)-3-phenyl-5-formazano]benzoate
CAS: 62625-22-3
Molecular Formula: C20H15N4NaO6S
1-(2-Hydroxycarbonyl-phenyl)-5-(2-Hydroxy-5-sulfophenyl)-3-phenylformazan,sodiumsalt - Names and Identifiers
1-(2-Hydroxycarbonyl-phenyl)-5-(2-Hydroxy-5-sulfophenyl)-3-phenylformazan,sodiumsalt - Physico-chemical Properties
| Molecular Formula | C20H15N4NaO6S |
| Molar Mass | 462.41 |
| Melting Point | 250-260°C (dec.) |
| Water Solubility | Soluble in aqueous alkali. Slightly soluble in water and alcohol. Insoluble in other organic solvents. |
| Appearance | Solid |
| Color | Dark violet powder |
| Odor | Odorless |
| BRN | 3872699 |
1-(2-Hydroxycarbonyl-phenyl)-5-(2-Hydroxy-5-sulfophenyl)-3-phenylformazan,sodiumsalt - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R36/38 - Irritating to eyes and skin. R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 29280000 |
1-(2-Hydroxycarbonyl-phenyl)-5-(2-Hydroxy-5-sulfophenyl)-3-phenylformazan,sodiumsalt - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Uses | Colorimetric determination of zinc and copper; direct determination of zinc complexation indicator, and determination of copper and mercury; indirect titration of calcium as a complexation indicator, Zinc, copper, nickel, cobalt, iron, manganese, cadmium, lead, cerium and indium Indicator for colorimetric determination of zinc, copper and mercury. Indirect titration of calcium, zinc, copper, nickel, cobalt, iron, manganese, cadmium, lead, cerium and indium as a complexation indicator. |
| production method | 1.? Stir anthranilic acid into a paste with a small amount of water, slowly add concentrated hydrochloric acid, cool to 0 ℃ and then add sodium nitrite for diazotization reaction, then add 20% sodium sulfite paste, acetic acid and zinc powder mixed with water at 10 ℃, stir and keep the temperature for 2 hours, when the solution is transparent, filter out the insoluble matter, after the filtrate is cooled, add concentrated hydrochloric acid, let the crystal of o-carboxyphenylhydrazine obtained by standing cooling and crystallization to make a saturated aqueous solution. The filtered filtrate is added with a 1:1 benzyl-ethanol solution under stirring until the yellow paste is precipitated, and the stirring is continued for 10-20min. After filtering, benzaldehyde shrinkage -2-carboxyphenylhydrazone is obtained for later use. The reaction formula of the above process is: add ice water and hydrochloric acid to o-hydroxyaniline -5-sulfonic acid to cool it to below 5 ℃, slowly add sodium nitrite solution under stirring for diazo reaction, and control the end point with potassium iodide-starch test paper. After the diazotization is completed, the solution formed by mixing the standby phenylhydrazone and 5% sodium hydroxide is slowly added under stirring, and the sodium hydroxide solution is added until it is fully dissolved, the temperature is controlled not to exceed 10 ℃, standing for 2h, filtering, adding acetic acid to the filtrate until acidic, and recrystallizing the precipitated crystals with ethanol to obtain pure products. |
Last Update：2024-04-09 15:16:44
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Multiple SpecificationsSpot supply
Product Name: Zincon Visit Supplier Webpage Request for quotationCAS: 62625-22-3
Tel: 18301782025
Email: 3008007409@qq.com
Mobile: 18021002903
QQ: 3008007409
Wechat: 18301782025
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