121177-78-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121177-78-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,1,7 and 7 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 121177-78:
(8*1)+(7*2)+(6*1)+(5*1)+(4*7)+(3*7)+(2*7)+(1*8)=104
104 % 10 = 4
So 121177-78-4 is a valid CAS Registry Number.