219938-90-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219938-90-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,9,3 and 8 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 219938-90:
(8*2)+(7*1)+(6*9)+(5*9)+(4*3)+(3*8)+(2*9)+(1*0)=176
176 % 10 = 6
So 219938-90-6 is a valid CAS Registry Number.