87989-23-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 87989-23-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,9,8 and 9 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 87989-23:
(7*8)+(6*7)+(5*9)+(4*8)+(3*9)+(2*2)+(1*3)=209
209 % 10 = 9
So 87989-23-9 is a valid CAS Registry Number.