Pigment Green 7 is one of the most stable of all phthalocyanine green pigments, having both excellent transparency and weathering resistance. It has very high hiding power, making it one of the most powerful colourants in use today. Pigment Green 7 is synthesized using metallic copper and chromium as the main raw materials. The pigment’s chemical name, shown above, is 4-(Chloromethylidene)-1-methylcyclohexane-1-carbonitrile.
First things first: what is pigment green 7?
According to Wikipedia, pigment green 7 (CAS RN: 134-67-0) is a synthetic or manufactured pigment with a metallic lustre. You can learn more about pigment green 7 by checking out our guide to find out what it is and where it's used. PPG Industries—more commonly known as PPG—is typically identified as one of several Pigment Green 7 Manufacturer; in fact, they produce a product called Eriochrome Green S, which they market as an organic pigment derived from thioflavin T. Manufacturers use pigments like PPG's to create paint, so you're likely familiar with pigments like these.
Where does pigment green 7 come from?
Pure pigment green 7 isn’t commercially available—this colour is created in a lab from other substances. The two primary ingredients that create pigment green 7 are copper chromite and manganese heptoxide. Copper chromite, which typically comes from ore deposits, is first reduced (to get rid of its oxygen content) before it’s combined with other chemicals and heated to create pigment green 7. Similarly, manganese heptoxide (which also typically comes from an ore deposit) is reacted with potassium hydroxide to create both pure pigment green and pure pigment red 28.
