7765-74-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7765-74-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,6 and 5 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 7765-74:
(6*7)+(5*7)+(4*6)+(3*5)+(2*7)+(1*4)=134
134 % 10 = 4
So 7765-74-4 is a valid CAS Registry Number.