1807542-89-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1807542-89-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,8,0,7,5,4 and 2 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1807542-89:
(9*1)+(8*8)+(7*0)+(6*7)+(5*5)+(4*4)+(3*2)+(2*8)+(1*9)=187
187 % 10 = 7
So 1807542-89-7 is a valid CAS Registry Number.