26691-40-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 26691-40-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,6,6,9 and 1 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 26691-40:
(7*2)+(6*6)+(5*6)+(4*9)+(3*1)+(2*4)+(1*0)=127
127 % 10 = 7
So 26691-40-7 is a valid CAS Registry Number.