219639-09-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219639-09-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,6,3 and 9 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 219639-09:
(8*2)+(7*1)+(6*9)+(5*6)+(4*3)+(3*9)+(2*0)+(1*9)=155
155 % 10 = 5
So 219639-09-5 is a valid CAS Registry Number.