223757-45-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 223757-45-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,3,7,5 and 7 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 223757-45:
(8*2)+(7*2)+(6*3)+(5*7)+(4*5)+(3*7)+(2*4)+(1*5)=137
137 % 10 = 7
So 223757-45-7 is a valid CAS Registry Number.