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

Uses

Chlorophosphonazo III was used as a chromogenic agent along with PVC, during the determination of calcium via a disposable optical sensor.

General Description

Chlorophosphonazo III is a highly sensitive reagent and can be used for the spectrophotometric determination of zirconium, titanium, thorium and scandium. It also finds application as an extractant, along with 1-butanol as solvent, for determination of micromolar concentrations of Nd(III), Th(IV) and U(VI) in brine. Above all that, it has two long wavelength maxima, one at 620 nm and one at 680 nm.

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.