81906-21-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81906-21-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,9,0 and 6 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 81906-21:
(7*8)+(6*1)+(5*9)+(4*0)+(3*6)+(2*2)+(1*1)=130
130 % 10 = 0
So 81906-21-0 is a valid CAS Registry Number.