7137-33-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7137-33-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,1,3 and 7 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 7137-33:
(6*7)+(5*1)+(4*3)+(3*7)+(2*3)+(1*3)=89
89 % 10 = 9
So 7137-33-9 is a valid CAS Registry Number.