2104-74-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2104-74-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,1,0 and 4 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 2104-74:
(6*2)+(5*1)+(4*0)+(3*4)+(2*7)+(1*4)=47
47 % 10 = 7
So 2104-74-7 is a valid CAS Registry Number.