7556-65-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7556-65-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,5,5 and 6 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 7556-65:
(6*7)+(5*5)+(4*5)+(3*6)+(2*6)+(1*5)=122
122 % 10 = 2
So 7556-65-2 is a valid CAS Registry Number.