1556-23-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1556-23-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,5,5 and 6 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1556-23:
(6*1)+(5*5)+(4*5)+(3*6)+(2*2)+(1*3)=76
76 % 10 = 6
So 1556-23-6 is a valid CAS Registry Number.