26421-34-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 26421-34-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,6,4,2 and 1 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 26421-34:
(7*2)+(6*6)+(5*4)+(4*2)+(3*1)+(2*3)+(1*4)=91
91 % 10 = 1
So 26421-34-1 is a valid CAS Registry Number.