139941-42-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139941-42-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,9,4 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 139941-42:
(8*1)+(7*3)+(6*9)+(5*9)+(4*4)+(3*1)+(2*4)+(1*2)=157
157 % 10 = 7
So 139941-42-7 is a valid CAS Registry Number.