204701-17-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204701-17-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,7,0 and 1 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 204701-17:
(8*2)+(7*0)+(6*4)+(5*7)+(4*0)+(3*1)+(2*1)+(1*7)=87
87 % 10 = 7
So 204701-17-7 is a valid CAS Registry Number.