31803-55-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31803-55-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,8,0 and 3 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 31803-55:
(7*3)+(6*1)+(5*8)+(4*0)+(3*3)+(2*5)+(1*5)=91
91 % 10 = 1
So 31803-55-1 is a valid CAS Registry Number.