631903-50-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 631903-50-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,1,9,0 and 3 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 631903-50:
(8*6)+(7*3)+(6*1)+(5*9)+(4*0)+(3*3)+(2*5)+(1*0)=139
139 % 10 = 9
So 631903-50-9 is a valid CAS Registry Number.