203864-55-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 203864-55-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,8,6 and 4 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 203864-55:
(8*2)+(7*0)+(6*3)+(5*8)+(4*6)+(3*4)+(2*5)+(1*5)=125
125 % 10 = 5
So 203864-55-5 is a valid CAS Registry Number.