121767-17-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121767-17-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,7,6 and 7 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 121767-17:
(8*1)+(7*2)+(6*1)+(5*7)+(4*6)+(3*7)+(2*1)+(1*7)=117
117 % 10 = 7
So 121767-17-7 is a valid CAS Registry Number.