21906-21-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21906-21-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,0 and 6 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21906-21:
(7*2)+(6*1)+(5*9)+(4*0)+(3*6)+(2*2)+(1*1)=88
88 % 10 = 8
So 21906-21-8 is a valid CAS Registry Number.