6444-23-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6444-23-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,4 and 4 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 6444-23:
(6*6)+(5*4)+(4*4)+(3*4)+(2*2)+(1*3)=91
91 % 10 = 1
So 6444-23-1 is a valid CAS Registry Number.