120939-89-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 120939-89-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,0,9,3 and 9 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 120939-89:
(8*1)+(7*2)+(6*0)+(5*9)+(4*3)+(3*9)+(2*8)+(1*9)=131
131 % 10 = 1
So 120939-89-1 is a valid CAS Registry Number.