85561-96-2
3-[(4-Chloro-2-phosphonophenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt
CAS: 85561-96-2
Molecular Formula: C16H10ClN2Na2O11PS2
85561-96-2 - Names and Identifiers
85561-96-2 - Physico-chemical Properties
| Molecular Formula | C16H10ClN2Na2O11PS2 |
| Molar Mass | 582.79 |
| Storage Condition | Room Temprature |
| Sensitive | Easily absorbing moisture |
| Use | Spectrophotometric determination of uranium (VI) and magnesium, etc. |
85561-96-2 - Introduction
It is easily soluble in water, red in neutral and acidic solutions, and purple in alkaline solutions. The maximum absorption wavelength of the complex with uranium (VI) is 600nm. The molar extinction coefficient is 23,100, and the optical density of the solution can remain unchanged in the range of pH5 · 2~8 · 0.
Last Update：2022-10-16 17:29:22
85561-96-2 - Reference Information
| Overview | M-formyl chlorophosphonazo has been widely used as an important inorganic ion developer. The chemical name of the substance is: 2-(4-chloro-2-phosphonylphenylazo)-7-(3-formylphenylazo)-1, 8-dihydroxy-3, 6-naphthalene disulfonic acid, abbreviated as CPA-pN. Its physical and chemical properties are as follows: dark purple powder. Soluble in water, ethanol-soluble, n-butanol and acetone. Insoluble in chloroform, carbon tetrachloride, benzene and other general organic solvents. The inorganic strong acid is blue. Generally, it is blue-purple in acidic medium. pH = 4 in hydrochloric acid in the red rose, can be generated with calcium, titanium ions water-soluble blue complex. It is easy to be damaged by strong oxidizing agent or strong reducing agent. |
| Application | Under the current industrial requirements of environmental protection, in the process of environmental testing, environmental monitoring and environmental governance, especially in the process of water quality detection and treatment, the analysis of calcium is very important. As a new type of high sensitivity display agent, M-formyl chlorophosphonazo has the characteristics of fast, efficient, accurate and simple. Chlorophosphonazo I is a raw material for the synthesis of M-formyl chlorophosphonazo. |
| preparation | the solid powder of the raw material chlorophosphonazo I, dissolve ten times the weight of the raw material chlorophosphonazo I in purified water at 60-80 °c, and then filter the above solution while hot to remove insoluble substances, next, add concentrated hydrochloric acid to the filtered solution, and place it overnight. Solid will precipitate out the next day, and the solid in the reaction solution will be filtered out: the weight ratio of concentrated hydrochloric acid is 1:1-1.1, soak for more than 1 hour, filter out the solid again, repeat the above soaking step according to the actual needs, and finally dry in a vacuum drying oven at 80-100 ℃, that is, the purification of the azo chlorine phosphine I is completed. |
Last Update：2024-04-09 21:00:56
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