(2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetraphenylporphyrinato)Fe(III)(2,4,6-C6H2F3) is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 220370-43-4 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 3 respectively. Calculate Digit Verification of CAS Registry Number 220370-43: (8*2)+(7*2)+(6*0)+(5*3)+(4*7)+(3*0)+(2*4)+(1*3)=84 84 % 10 = 4 So 220370-43-4 is a valid CAS Registry Number.