217457-65-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 217457-65-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,7,4,5 and 7 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 217457-65:
(8*2)+(7*1)+(6*7)+(5*4)+(4*5)+(3*7)+(2*6)+(1*5)=143
143 % 10 = 3
So 217457-65-3 is a valid CAS Registry Number.