91900-55-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91900-55-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,9,0 and 0 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 91900-55:
(7*9)+(6*1)+(5*9)+(4*0)+(3*0)+(2*5)+(1*5)=129
129 % 10 = 9
So 91900-55-9 is a valid CAS Registry Number.