27688-31-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 27688-31-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,7,6,8 and 8 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 27688-31:
(7*2)+(6*7)+(5*6)+(4*8)+(3*8)+(2*3)+(1*1)=149
149 % 10 = 9
So 27688-31-9 is a valid CAS Registry Number.