21524-98-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21524-98-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,2 and 4 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 21524-98:
(7*2)+(6*1)+(5*5)+(4*2)+(3*4)+(2*9)+(1*8)=91
91 % 10 = 1
So 21524-98-1 is a valid CAS Registry Number.