81239-77-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81239-77-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,2,3 and 9 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81239-77:
(7*8)+(6*1)+(5*2)+(4*3)+(3*9)+(2*7)+(1*7)=132
132 % 10 = 2
So 81239-77-2 is a valid CAS Registry Number.