Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Representative electron microscopy images of the five organic pigments. Mixed chlorinated DPP isomers (A), fine Pigment Red 254 (B), coarse Pigment Red 254 (C), fine meta-chloro DPP (D) and coarse meta-chloro DPP (E) and the two inorganic fine Pigment Red 101 (F) and coarse Pigment Red 101 (G).
