Benzoic acid, 2-(2-((2-(2-hydroxy-5-sulfophenyl)diazenyl)phenylmethylene)hydrazinyl)-
Zincon monosodium salt
CAS: 135-52-4
Molecular Formula: C20H16N4O6S
Benzoic acid, 2-(2-((2-(2-hydroxy-5-sulfophenyl)diazenyl)phenylmethylene)hydrazinyl)- - Names and Identifiers
Benzoic acid, 2-(2-((2-(2-hydroxy-5-sulfophenyl)diazenyl)phenylmethylene)hydrazinyl)- - Physico-chemical Properties
| Molecular Formula | C20H16N4O6S |
| Molar Mass | 440.43 |
| Density | 1.48±0.1 g/cm3(Predicted) |
| Melting Point | 203°C (dec.) |
| Appearance | Reddish brown powder |
| pKa | pK2:4;pK3:7.85;pK4:15 (25°C) |
| Storage Condition | Room Temprature |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00064385 |
| Use | As a sensitive reagent for the determination of zinc and Mercury |
Benzoic acid, 2-(2-((2-(2-hydroxy-5-sulfophenyl)diazenyl)phenylmethylene)hydrazinyl)- - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - 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. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S36 - Wear suitable protective clothing. |
Benzoic acid, 2-(2-((2-(2-hydroxy-5-sulfophenyl)diazenyl)phenylmethylene)hydrazinyl)- - Reference
| Reference Show more | 1. [IF=5.81] Zhang Juntao et al."Synthesis of Icariin-Zinc and its Protective Effect on Exercise Fatigue and Reproductive System Related Glands in Male Rats."Front Pharmacol. 2021 Jun;0:1334 |
Benzoic acid, 2-(2-((2-(2-hydroxy-5-sulfophenyl)diazenyl)phenylmethylene)hydrazinyl)- - Introduction
Soluble in ethanol and alkali, easily soluble in alkaline solution. Soluble in sodium hydroxide is red, insoluble in water, and quickly decomposes in acidic medium. In case of zinc, a blue compound is formed, which is a solution when it is dilute, and a dark blue precipitate when it is thick.
Last Update：2022-10-16 17:13:35
Benzoic acid, 2-(2-((2-(2-hydroxy-5-sulfophenyl)diazenyl)phenylmethylene)hydrazinyl)- - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Zinc reagent | Zinc reagent is an organic ligand that can form a blue complex with zinc and is used as an indicator for direct determination of zinc. Zinc can form complexes with many organic ligands and has a wide range of uses. For example, zinc can form hydrophobic complexes with dithizone, which is insoluble in water and soluble in organic solvents such as CCl4 and CHCl3. According to the above properties, zinc in aqueous solution can be extracted with dithizone first, and then the zinc content can be determined by colorimetry. Zinc diethyldithiocarbamate (alias ZDC, accelerator EZ), which is used as a rubber accelerator in industry, is a complex formed by zinc and organic ligands. In addition, zinc complexes have important medical applications, such as zinc insulin has a significant effect on diabetes. Zinc complexes are a class of complexes with zinc as the central atom. Zinc can form stable complex ions [Zn(NH3)4]2 with NH3. Zinc ammonia complexes are used in the electroplating industry for ammonium zinc plating process. It is used to replace cyanide galvanizing to improve working conditions and prevent environmental pollution. The zinc salt of ammonium salt galvanizing can be zinc chloride, zinc oxide, zinc sulfate, zinc acetate, etc., and the salt is ammonium chloride. The zinc salt in the electroplating solution provides the central atom Zn2, and the ammonium chloride provides the ligand NH3. The formed complex ions have dissociation and the generated coordination balance in the solution. During electroplating, the zinc ion concentration in the plating solution can be kept low to control the reduction process of zinc ions and form a dense coating on the plated part. Another zinc complex dichloro-dihydroxyzinc (II) acid H2[ZnCl2(OH)2] is used in metal welding process. In welding, "water" is commonly used as the solder flux, and water is the concentrated solution of zinc chloride. In this solution, H2[ZnCl2(OH)2] is significantly acidic and can dissolve metal oxides. When welding metal, use water to remove metal surface oxides without damaging the metal surface. The salt generated by the reaction covers the metal surface so that it will no longer oxidize, thus ensuring that the solder and the metal are firmly combined. Figure 1 is a zinc reagent. |
| main conditions and conditions for determination | pH9.5~10 buffer with sodium tetraborate, NaCl and NaOH, zinc salt standard solution with 1/10 calcium content to indicate the end point, EGTA titrated to blue → orange. A large amount of ammonium salt will affect the end point judgment and make the result higher. Zn-zinc reagent is an indirect indicator. Because the lgK of the Ca-EGTA is greater than the Zn-EGTA, the zinc reagent and Ca2 do not develop color, and the Zn2 and zinc reagent are blue, so the end point At that time, a slight excess of EGTA and Zn-zinc reagent replace the zinc reagent with its orange color. |
| Herschel reagent | Herschel reagent is Herzberg (Herzbery) stain, also called zinc iodide reagent, which is the most commonly used stain. It is made by mixing two solutions A and B. Dissolve 20g of anhydrous zinc chloride in 10mL of distilled water as solution A. Dissolve 1g of potassium iodide and 0.1g of iodine in 5mL of distilled water to be solution B. After solution B is cooled, it is added to solution A drop by drop. The mixed solution is placed in a brown bottle with a grinding plug, 1-2 iodine particles are placed on the surface of the solution, and placed in a dark place for 24 hours. |
| Use | Used as a sensitive reagent for the determination of zinc and mercury |
Last Update：2024-04-09 20:49:11
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