21238-34-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21238-34-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,3 and 8 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 21238-34:
(7*2)+(6*1)+(5*2)+(4*3)+(3*8)+(2*3)+(1*4)=76
76 % 10 = 6
So 21238-34-6 is a valid CAS Registry Number.