57723-18-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57723-18-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,7,2 and 3 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 57723-18:
(7*5)+(6*7)+(5*7)+(4*2)+(3*3)+(2*1)+(1*8)=139
139 % 10 = 9
So 57723-18-9 is a valid CAS Registry Number.