644981-19-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 644981-19-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,4,9,8 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 644981-19:
(8*6)+(7*4)+(6*4)+(5*9)+(4*8)+(3*1)+(2*1)+(1*9)=191
191 % 10 = 1
So 644981-19-1 is a valid CAS Registry Number.