64991-65-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 64991-65-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,4,9,9 and 1 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 64991-65:
(7*6)+(6*4)+(5*9)+(4*9)+(3*1)+(2*6)+(1*5)=167
167 % 10 = 7
So 64991-65-7 is a valid CAS Registry Number.