70639-64-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 70639-64-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,6,3 and 9 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 70639-64:
(7*7)+(6*0)+(5*6)+(4*3)+(3*9)+(2*6)+(1*4)=134
134 % 10 = 4
So 70639-64-4 is a valid CAS Registry Number.