71728-47-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71728-47-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,7,2 and 8 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 71728-47:
(7*7)+(6*1)+(5*7)+(4*2)+(3*8)+(2*4)+(1*7)=137
137 % 10 = 7
So 71728-47-7 is a valid CAS Registry Number.
InChI:InChI=1/C25H20N2O4S/c1-25(2,17-7-4-3-5-8-17)18-11-13-19(14-12-18)31-32(29,30)23-10-6-9-21-20(23)15-16-22(27-26)24(21)28/h3-16H,1-2H3