1914-99-4

Basic information

• Product Name: CHLOROPHOSPHONAZO III
• Synonyms: 2,7-naphthalenedisulfonicacid,3,6-bis[(4-chloro-2-phosphonophenyl)azo]-4,5-di;hydroxy-;BIS(4-CHLORO-2-PHOSPHONOBENZOLAZO)CHROMO-TROPIC ACID;CHLOROPHOSPHONAZO III;Chlorophosphonazo Ⅲ;3,6-bis[(4-chloro-2-phosphonophenyl)azo]-4,5-dihydroxynaphthalene-2,7-disulphonic acid;CHLORPHOSPHONAZO III, HIGH GRADE;2,7-Bis(4-chloro-2-phosphonophenylazo)-1,8-dihydroxy-3,6-naphthalenedisulfonicacid,disodiumsalt
• CAS NO: 1914-99-4
• Molecular Formula: C₂₂H₁₆Cl₂N₄O₁₄P₂S₂
• Molecular Weight: 757.36
• EINECS: 217-628-8
• Mol File: 1914-99-4.mol
• Article Data: 1

Chemical Properties

• Appearance: /
• Density: 2.08 g/cm³

• Refractive Index: 1.811
• Storage Temp.: -20°C Freezer, Under inert atmosphere
• Solubility: Methanol (Slightly), Water (Slightly)
• PKA: -1.36±0.40(Predicted)
• BRN: 2934871
• CAS DataBase Reference: CHLOROPHOSPHONAZO III(CAS DataBase Reference)
• NIST Chemistry Reference: CHLOROPHOSPHONAZO III(1914-99-4)
• EPA Substance Registry System: CHLOROPHOSPHONAZO III(1914-99-4)

Safety Data

• Safety Statements: 22-24/25
• WGK Germany: 3
• Hazardous Substances Data: 1914-99-4(Hazardous Substances Data)

Usage

Description

Chlorophosphonazo III is a highly sensitive reagent known for its spectrophotometric determination capabilities of various elements such as zirconium, titanium, thorium, and scandium. It is characterized by two long wavelength maxima, one at 620 nm and one at 680 nm, which contribute to its effectiveness in analytical applications.

Uses

Used in Analytical Chemistry:
Chlorophosphonazo III is used as a chromogenic agent for the spectrophotometric determination of elements like zirconium, titanium, thorium, and scandium. Its high sensitivity and distinct wavelength maxima make it a valuable tool in this field.
Used in Optical Sensors:
In conjunction with PVC, Chlorophosphonazo III is utilized as a chromogenic agent during the determination of calcium via a disposable optical sensor. This application highlights its versatility in different analytical techniques.
Used in Extractant Solutions:
Chlorophosphonazo III also finds application as an extractant, particularly when used with 1-butanol as a solvent. It is effective for determining micromolar concentrations of Nd(III), Th(IV), and U(VI) in brine, showcasing its utility in the extraction and analysis of specific elements.

InChI:InChI=1/C22H16Cl2N4O14P2S2/c23-10-1-3-12(14(7-10)43(31,32)33)25-27-19-16(45(37,38)39)5-9-6-17(46(40,41)42)20(22(30)18(9)21(19)29)28-26-13-4-2-11(24)8-15(13)44(34,35)36/h1-8,25-26H,(H2,31,32,33)(H2,34,35,36)(H,37,38,39)(H,40,41,42)/b27-19-,28-20-

Upstream product

• 18275-77-9 2-amino-5-chlorophenyl phosphonic acid 
• 129-96-4 disodium chromotropate 

Relevant articles and documents

Method for preparing chlorophosphonazo III

The invention relates to a method for preparing chlorophosphonazo III, and steps are as follows: (1) preparation, to be more specific, aminochIorobenzene phosphoric acid, dilute hydrochloric acid, a sodium nitrite solution and chromotropic acid disodium salt are reacted to obtain crude chlorophosphonazo III; (2) acidification, to be more specific, a solid in a reaction solution of the step (1) is filtered out; the solid is warmly dissolved in a certain amount of dilute hydrochloric acid, and placed overnight for precipitation of a solid; and (3) drying. The method can reduce the production cost and improve the enterprise market competition ability during production without further using special equipment which is very expensive, and the product can be applied more in the market.