1939-80-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1939-80-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,9,3 and 9 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1939-80:
(6*1)+(5*9)+(4*3)+(3*9)+(2*8)+(1*0)=106
106 % 10 = 6
So 1939-80-6 is a valid CAS Registry Number.