975-17-7 Usage
Chemical Properties
orange to brown-red powder
Uses
Phenylfluorone is an organic reagent for the spectrophotometric determination of some heavy metals. It is used in presence of cetylpyridinium chloride for spectrophotometric determination of copper(II) in blood serum. It is used in the determination of germanium. It is also used to determine molybdenum(VI).
Purification Methods
Recrystallise it from warm, acidified EtOH by addition of ammonia. The crude material (1g) can be extracted with EtOH (50mL) in a Soxhlet apparatus for 10hours to remove impurities. Impurities can be detected by paper electrophoresis. The triacetate forms yellow needles from EtOH (m 230-233o). [Petrova et al. Anal Lett 5 695 1972, Beilstein 18 H 199, 18 I 404, 18 III/IV 2824.]
Check Digit Verification of cas no
The CAS Registry Mumber 975-17-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 9,7 and 5 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 975-17:
(5*9)+(4*7)+(3*5)+(2*1)+(1*7)=97
97 % 10 = 7
So 975-17-7 is a valid CAS Registry Number.
InChI:InChI=1/C19H12O5/c20-13-6-11-17(8-15(13)22)24-18-9-16(23)14(21)7-12(18)19(11)10-4-2-1-3-5-10/h1-9,20-22H
975-17-7Relevant articles and documents
Crystallographic studies on a series of salts of 2,3,7-trihydroxy-9-phenyl-fluorone
Abrahams, Brendan F.,McCormick, Laura J.,Robson, Richard
experimental part, p. 466 - 471 (2009/07/18)
2,3,7-Trihydroxy-9-phenyl-fluorone (hereafter H3Z) has been synthesised in its H4Z+, H3Z, H2Z- and Z3- protonation states. X-ray crystal structure determinations have been carried out for (H4Z)(HSO4), H3Z, [EtiPr2NH]H2Z, solvated (PPh4)H2Z and solvated K3Z. In each of these salts the 9-phenyl group adopts a different orientation so as to be involved in intermolecular aromatic interactions. The 3- and 6-phenolic carbon-oxygen bond lengths show that double bond character can be delocalised from the ketone to the deprotonated phenoxide across the conjugated π system of the fluorone.
