139742-77-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139742-77-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,7,4 and 2 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 139742-77:
(8*1)+(7*3)+(6*9)+(5*7)+(4*4)+(3*2)+(2*7)+(1*7)=161
161 % 10 = 1
So 139742-77-1 is a valid CAS Registry Number.