(5Z,10Z,14Z,19Z)-5-(2-Benzyloxy-naphthalen-1-yl)-2,3,7,8,12,13,17,18-octaethyl-porphyrin is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 143705-89-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,7,0 and 5 respectively; the second part has 2 digits, 8 and 9 respectively. Calculate Digit Verification of CAS Registry Number 143705-89: (8*1)+(7*4)+(6*3)+(5*7)+(4*0)+(3*5)+(2*8)+(1*9)=129 129 % 10 = 9 So 143705-89-9 is a valid CAS Registry Number.