89939-50-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 89939-50-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,9,3 and 9 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 89939-50:
(7*8)+(6*9)+(5*9)+(4*3)+(3*9)+(2*5)+(1*0)=204
204 % 10 = 4
So 89939-50-4 is a valid CAS Registry Number.