206551-25-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 206551-25-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,6,5,5 and 1 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 206551-25:
(8*2)+(7*0)+(6*6)+(5*5)+(4*5)+(3*1)+(2*2)+(1*5)=109
109 % 10 = 9
So 206551-25-9 is a valid CAS Registry Number.