26387-91-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 26387-91-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,6,3,8 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 26387-91:
(7*2)+(6*6)+(5*3)+(4*8)+(3*7)+(2*9)+(1*1)=137
137 % 10 = 7
So 26387-91-7 is a valid CAS Registry Number.