56389-17-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 56389-17-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,3,8 and 9 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 56389-17:
(7*5)+(6*6)+(5*3)+(4*8)+(3*9)+(2*1)+(1*7)=154
154 % 10 = 4
So 56389-17-4 is a valid CAS Registry Number.