21337-42-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21337-42-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,3,3 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21337-42:
(7*2)+(6*1)+(5*3)+(4*3)+(3*7)+(2*4)+(1*2)=78
78 % 10 = 8
So 21337-42-8 is a valid CAS Registry Number.