874521-21-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 874521-21-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,4,5,2 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 874521-21:
(8*8)+(7*7)+(6*4)+(5*5)+(4*2)+(3*1)+(2*2)+(1*1)=178
178 % 10 = 8
So 874521-21-8 is a valid CAS Registry Number.