2,7-(bis(2-arsonophenylazo))-1,8-dihydroxynaphthalene-3,6-disulphonic acid
Arsenazo III
CAS: 1668-00-4
Molecular Formula: C22H18As2N4O14S2
2,7-(bis(2-arsonophenylazo))-1,8-dihydroxynaphthalene-3,6-disulphonic acid - Names and Identifiers
2,7-(bis(2-arsonophenylazo))-1,8-dihydroxynaphthalene-3,6-disulphonic acid - Physico-chemical Properties
| Molecular Formula | C22H18As2N4O14S2 |
| Molar Mass | 776.37 |
| Melting Point | >320°C(lit.) |
| Solubility | ammonium hydroxide: soluble1mg/mL |
| Appearance | Deep purple powder |
| Color | Brown |
| BRN | 5717957 |
| pKa | -1.25±0.40(Predicted) |
| PH | 2.3 (10g/l, H2O, 20℃) |
| Storage Condition | Store below +30°C. |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00036695 |
| Use | Test thorium, rare earth metal complex indicator, colorimetric or spectrophotometric determination of actinides, barium, bismuth, calcium, copper, iron, lanthanum, neptunium, palladium, polonium, plutonium, rare earth metals, scandium, thorium, uranium and zirconium. |
2,7-(bis(2-arsonophenylazo))-1,8-dihydroxynaphthalene-3,6-disulphonic acid - Risk and Safety
| Risk Codes | R23/25 - Toxic by inhalation and if swallowed. R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S20/21 - S28 - After contact with skin, wash immediately with plenty of soap-suds. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 3465 6.1/PG 2 |
| WGK Germany | 3 |
| HS Code | 2931 90 00 |
| Hazard Class | 6.1(b) |
| Packing Group | III |
2,7-(bis(2-arsonophenylazo))-1,8-dihydroxynaphthalene-3,6-disulphonic acid - Nature
Open Data Verified Data
purple-brown powder. Soluble in water, the solution is Rose Red. It is green in concentrated sulfuric acid and blue in alkaline solution.
Last Update：2024-01-02 23:10:35
2,7-(bis(2-arsonophenylazo))-1,8-dihydroxynaphthalene-3,6-disulphonic acid - Preparation Method
Open Data Verified Data
O-aminobenzoic acid was added to hydrochloric acid for dissolution, and sodium nitrate solution was added dropwise to prepare a heavy ammonia salt. In addition, disodium chromotropic acid is added to lithium chloride and sodium hydroxide aqueous solution, the above diazonium salt solution and sodium hydroxide solution are added in sequence, and then concentrated hydrochloric acid is added to precipitate, and then dissolved in sodium hydroxide solution, filtered and dried to obtain arsenamide.
Last Update：2022-01-01 09:25:53
2,7-(bis(2-arsonophenylazo))-1,8-dihydroxynaphthalene-3,6-disulphonic acid - Introduction
Easily soluble in water, rose-colored in aqueous solution, red in sulfuric acid, and blue in alkaline solution.
Last Update：2022-10-16 17:14:17
2,7-(bis(2-arsonophenylazo))-1,8-dihydroxynaphthalene-3,6-disulphonic acid - Use
Open Data Verified Data
sensitive reagents for Colorimetric Determination of uranium, thorium, zirconium, cadmium, zinc, calcium, barium, bismuth and rare earth.
Last Update：2022-01-01 09:25:53
2,7-(bis(2-arsonophenylazo))-1,8-dihydroxynaphthalene-3,6-disulphonic acid - Reference Information
| Use | Used as a sensitive reagent for colorimetric determination of thorium and uranium. Test thorium, rare earth metal complexation indicator, colorimetric determination or spectroscopic determination Actinides, barium, bismuth, calcium, copper, iron, lanthanum, neptunium, palladium, polonium, plutonium, rare earth metals, scandium, thorium, uranium and zirconium. Verification of thorium; rare earth metal complexation indicator; colorimetric or spectrophotometric determination of actinides, barium, bismuth, calcium, copper, iron, lanthanum, neptunium, palladium, polonium, plutonium, rare earth metals, scandium, thorium, Uranium and zirconium |
| production method | add o-aminophenylarsonic acid into hydrochloric acid to dissolve, and add sodium nitrate solution drop by drop to prepare diazonium salt. In addition, add disodium chromatic acid to lithium chloride and sodium hydroxide aqueous solution, sequentially add the diazonium salt solution and sodium hydroxide solution above, then add concentrated hydrochloric acid to precipitate, and then dissolve in sodium hydroxide solution, filter, and dry to obtain Arsenazo. |
Last Update：2024-04-09 21:01:54
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Tel: +86-17551318830
Email: r@reformchem.com
Mobile: +86-17551318830
QQ: 3787852685
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Product Name: Arsenazo III Request for quotationCAS: 1668-00-4
Tel: +86-17551318830
Email: r@reformchem.com
Mobile: +86-17551318830
QQ: 3785839865
Spot supply
Product Name: Arsenazo III Visit Supplier Webpage Request for quotationCAS: 1668-00-4
Tel: 18301782025
Email: 3008007409@qq.com
Mobile: 18021002903
QQ: 3008007409
Wechat: 18301782025
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