3821-34-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3821-34-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,8,2 and 1 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 3821-34:
(6*3)+(5*8)+(4*2)+(3*1)+(2*3)+(1*4)=79
79 % 10 = 9
So 3821-34-9 is a valid CAS Registry Number.