1900-50-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1900-50-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,9,0 and 0 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1900-50:
(6*1)+(5*9)+(4*0)+(3*0)+(2*5)+(1*0)=61
61 % 10 = 1
So 1900-50-1 is a valid CAS Registry Number.