7556-71-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7556-71-0 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, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 7556-71:
(6*7)+(5*5)+(4*5)+(3*6)+(2*7)+(1*1)=120
120 % 10 = 0
So 7556-71-0 is a valid CAS Registry Number.