121971-87-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121971-87-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,9,7 and 1 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 121971-87:
(8*1)+(7*2)+(6*1)+(5*9)+(4*7)+(3*1)+(2*8)+(1*7)=127
127 % 10 = 7
So 121971-87-7 is a valid CAS Registry Number.