207553-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 207553-81-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,7,5,5 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 207553-81:
(8*2)+(7*0)+(6*7)+(5*5)+(4*5)+(3*3)+(2*8)+(1*1)=129
129 % 10 = 9
So 207553-81-9 is a valid CAS Registry Number.