189939-49-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 189939-49-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,9,3 and 9 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 189939-49:
(8*1)+(7*8)+(6*9)+(5*9)+(4*3)+(3*9)+(2*4)+(1*9)=219
219 % 10 = 9
So 189939-49-9 is a valid CAS Registry Number.