21900-06-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21900-06-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,0 and 0 respectively; the second part has 2 digits, 0 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21900-06:
(7*2)+(6*1)+(5*9)+(4*0)+(3*0)+(2*0)+(1*6)=71
71 % 10 = 1
So 21900-06-1 is a valid CAS Registry Number.