18766-23-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18766-23-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,7,6 and 6 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 18766-23:
(7*1)+(6*8)+(5*7)+(4*6)+(3*6)+(2*2)+(1*3)=139
139 % 10 = 9
So 18766-23-9 is a valid CAS Registry Number.