166543-63-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 166543-63-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,6,5,4 and 3 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 166543-63:
(8*1)+(7*6)+(6*6)+(5*5)+(4*4)+(3*3)+(2*6)+(1*3)=151
151 % 10 = 1
So 166543-63-1 is a valid CAS Registry Number.