[(2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetraphenylporphyrinate)Fe(III)(3,5-C6H3F2)] is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 220370-42-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,3,7 and 0 respectively; the second part has 2 digits, 4 and 2 respectively. Calculate Digit Verification of CAS Registry Number 220370-42: (8*2)+(7*2)+(6*0)+(5*3)+(4*7)+(3*0)+(2*4)+(1*2)=83 83 % 10 = 3 So 220370-42-3 is a valid CAS Registry Number.