2688-09-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2688-09-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,6,8 and 8 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 2688-09:
(6*2)+(5*6)+(4*8)+(3*8)+(2*0)+(1*9)=107
107 % 10 = 7
So 2688-09-7 is a valid CAS Registry Number.