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20905-50-4

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20905-50-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20905-50-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,9,0 and 5 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20905-50:
(7*2)+(6*0)+(5*9)+(4*0)+(3*5)+(2*5)+(1*0)=84
84 % 10 = 4
So 20905-50-4 is a valid CAS Registry Number.
InChI:InChI=1/C52H98N16O13/c1-9-29(6)40-51(80)63-34(16-22-55)43(72)61-36(18-24-57)48(77)67-41(30(7)69)50(79)58-25-19-37(46(75)60-33(15-21-54)45(74)65-38(26-28(4)5)49(78)66-40)62-44(73)35(17-23-56)64-52(81)42(31(8)70)68-47(76)32(14-20-53)59-39(71)13-11-10-12-27(2)3/h27-38,40-42,69-70H,9-26,53-57H2,1-8H3,(H,58,79)(H,59,71)(H,60,75)(H,61,72)(H,62,73)(H,63,80)(H,64,81)(H,65,74)(H,66,78)(H,67,77)(H,68,76)/t29-,30+,31+,32-,33-,34-,35?,36+,37-,38-,40?,41?,42?/m0/s1

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