307511-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 307511-21-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,7,5,1 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 307511-21:
(8*3)+(7*0)+(6*7)+(5*5)+(4*1)+(3*1)+(2*2)+(1*1)=103
103 % 10 = 3
So 307511-21-3 is a valid CAS Registry Number.