17656-98-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17656-98-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,6,5 and 6 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 17656-98:
(7*1)+(6*7)+(5*6)+(4*5)+(3*6)+(2*9)+(1*8)=143
143 % 10 = 3
So 17656-98-3 is a valid CAS Registry Number.