305838-12-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 305838-12-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,5,8,3 and 8 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 305838-12:
(8*3)+(7*0)+(6*5)+(5*8)+(4*3)+(3*8)+(2*1)+(1*2)=134
134 % 10 = 4
So 305838-12-4 is a valid CAS Registry Number.