19402-90-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19402-90-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,4,0 and 2 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 19402-90:
(7*1)+(6*9)+(5*4)+(4*0)+(3*2)+(2*9)+(1*0)=105
105 % 10 = 5
So 19402-90-5 is a valid CAS Registry Number.