5689-25-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5689-25-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,6,8 and 9 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 5689-25:
(6*5)+(5*6)+(4*8)+(3*9)+(2*2)+(1*5)=128
128 % 10 = 8
So 5689-25-8 is a valid CAS Registry Number.