27657-18-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 27657-18-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,7,6,5 and 7 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 27657-18:
(7*2)+(6*7)+(5*6)+(4*5)+(3*7)+(2*1)+(1*8)=137
137 % 10 = 7
So 27657-18-7 is a valid CAS Registry Number.