71819-52-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71819-52-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,8,1 and 9 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 71819-52:
(7*7)+(6*1)+(5*8)+(4*1)+(3*9)+(2*5)+(1*2)=138
138 % 10 = 8
So 71819-52-8 is a valid CAS Registry Number.
InChI:InChI=1/C40H24Cl4N6O4/c41-23-9-15-31(43)33(19-23)47-49-35-27-7-3-1-5-21(27)17-29(37(35)51)39(53)45-25-11-13-26(14-12-25)46-40(54)30-18-22-6-2-4-8-28(22)36(38(30)52)50-48-34-20-24(42)10-16-32(34)44/h1-20,51-52H,(H,45,53)(H,46,54)