129217-87-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 129217-87-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,2,1 and 7 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 129217-87:
(8*1)+(7*2)+(6*9)+(5*2)+(4*1)+(3*7)+(2*8)+(1*7)=134
134 % 10 = 4
So 129217-87-4 is a valid CAS Registry Number.