57542-63-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57542-63-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,5,4 and 2 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 57542-63:
(7*5)+(6*7)+(5*5)+(4*4)+(3*2)+(2*6)+(1*3)=139
139 % 10 = 9
So 57542-63-9 is a valid CAS Registry Number.