957505-21-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 957505-21-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,5,7,5,0 and 5 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 957505-21:
(8*9)+(7*5)+(6*7)+(5*5)+(4*0)+(3*5)+(2*2)+(1*1)=194
194 % 10 = 4
So 957505-21-4 is a valid CAS Registry Number.