81957-68-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81957-68-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,9,5 and 7 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 81957-68:
(7*8)+(6*1)+(5*9)+(4*5)+(3*7)+(2*6)+(1*8)=168
168 % 10 = 8
So 81957-68-8 is a valid CAS Registry Number.
InChI:InChI=1/C21H33NO6S/c1-15(6-5-7-16(2)20(25)22-12-13-29(26,27)28)8-9-18-17(3)19(24)10-11-21(18,4)14-23/h6,8-9,16,23H,5,7,10-14H2,1-4H3,(H,22,25)(H,26,27,28)/b9-8+,15-6+