23671-80-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23671-80-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,6,7 and 1 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 23671-80:
(7*2)+(6*3)+(5*6)+(4*7)+(3*1)+(2*8)+(1*0)=109
109 % 10 = 9
So 23671-80-9 is a valid CAS Registry Number.