3909-65-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3909-65-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,9,0 and 9 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 3909-65:
(6*3)+(5*9)+(4*0)+(3*9)+(2*6)+(1*5)=107
107 % 10 = 7
So 3909-65-7 is a valid CAS Registry Number.