203640-51-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 203640-51-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,6,4 and 0 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 203640-51:
(8*2)+(7*0)+(6*3)+(5*6)+(4*4)+(3*0)+(2*5)+(1*1)=91
91 % 10 = 1
So 203640-51-1 is a valid CAS Registry Number.