70139-56-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 70139-56-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,1,3 and 9 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 70139-56:
(7*7)+(6*0)+(5*1)+(4*3)+(3*9)+(2*5)+(1*6)=109
109 % 10 = 9
So 70139-56-9 is a valid CAS Registry Number.