518-40-1 Usage
Preparation
Fluorescein (C.I. Acid Yellow 73, C.I. 45350) in aqueous solution with Iodine and Iodic Acid or with Iodine monochloride and alkali are two iodized, and?made into a free acid form.
Properties and Applications
yellow peach. Soluble in water for cherry red, no fluorescence. In concentrated sulfuric acid for brown light yellow, dilution after brown light yellow precipitation. Dye aqueous solution of sodium hydroxide to join a soluble red precipitation. Used for pharmaceutical and cosmetics coloring.
Check Digit Verification of cas no
The CAS Registry Mumber 518-40-1 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,1 and 8 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 518-40:
(5*5)+(4*1)+(3*8)+(2*4)+(1*0)=61
61 % 10 = 1
So 518-40-1 is a valid CAS Registry Number.
InChI:InChI=1/C20H10I2O5/c21-16-13(23)7-5-11-15(9-3-1-2-4-10(9)20(25)26)12-6-8-14(24)17(22)19(12)27-18(11)16/h1-8,23H,(H,25,26)