7737-39-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7737-39-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,3 and 7 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 7737-39:
(6*7)+(5*7)+(4*3)+(3*7)+(2*3)+(1*9)=125
125 % 10 = 5
So 7737-39-5 is a valid CAS Registry Number.