91765-42-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91765-42-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,7,6 and 5 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 91765-42:
(7*9)+(6*1)+(5*7)+(4*6)+(3*5)+(2*4)+(1*2)=153
153 % 10 = 3
So 91765-42-3 is a valid CAS Registry Number.