1542-90-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1542-90-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,5,4 and 2 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1542-90:
(6*1)+(5*5)+(4*4)+(3*2)+(2*9)+(1*0)=71
71 % 10 = 1
So 1542-90-1 is a valid CAS Registry Number.