1693-26-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1693-26-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,9 and 3 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1693-26:
(6*1)+(5*6)+(4*9)+(3*3)+(2*2)+(1*6)=91
91 % 10 = 1
So 1693-26-1 is a valid CAS Registry Number.