21009-76-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21009-76-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,0,0 and 9 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21009-76:
(7*2)+(6*1)+(5*0)+(4*0)+(3*9)+(2*7)+(1*6)=67
67 % 10 = 7
So 21009-76-7 is a valid CAS Registry Number.