23861-42-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23861-42-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,8,6 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 23861-42:
(7*2)+(6*3)+(5*8)+(4*6)+(3*1)+(2*4)+(1*2)=109
109 % 10 = 9
So 23861-42-9 is a valid CAS Registry Number.