Phthalocyanine Green G

Phthalo green

Phthalocyanine green pigment
Colour coordinates
Hex triplet	#123524
sRGB^B (r, g, b)	(18, 53, 36)
CMYK^H (c, m, y, k)	(82, 51, 80, 64)
HSV (h, s, v)	(151°, 66%, 21%)
Source	The Mother of All HTML Colo(u)r Charts
B: Normalized to [0–255] (byte) H: Normalized to [0–100] (hundred)

Phthalocyanine green G

Phthalocyanine green G, also called phthalo green, viridian hue, pigment green 7, copper phthalocyanine green, C.I. pigment green 7, non-flocculating green G, polychloro copper phthalocyanine, and C.I. 74260, is a synthetic green pigment from the group of phthalocyanine dyes, a complex of copper(II) with chlorinated phthalocyanine. It is a very soft green powder, insoluble in water.

Its CAS numbers are 1328-45-6 and 1328-53-6 depending on the extent of chlorine substitition: chemical formula ranges from C₃₂H₃Cl₁₃CuN₈ to C₃₂HCl₁₅CuN₈. It is a bright, high intensity colour used in oil and acrylic based artist's paints, and in other applications.

Properties, chemistry and production

Phthalocyanine green is a phthalocyanine blue pigment where most of the hydrogen atoms are replaced with chlorine. The strongly electronegative chlorine atoms influence the distribution of the electrons in the phthalocyanine structure, shifting its absorption spectrum. It is made by chlorination of the phthalocyanine blue as a melt of sodium chloride and aluminium chloride, to which chlorine is introduced at elevated temperature.

The phthalo green molecules are highly stable. They are resistant to alkali, acids, solvents, heat, and ultraviolet radiation.

Uses

Due to its stability, phthalo green is used in inks, coatings, and many plastics. In application it is transparent. The pigment is insoluble and has no tendency to migrate in the material. It is a standard pigment used in printing ink and packaging industry. It is also allowed in all cosmetics except those used around the eyes, and is used in some tattoos.

Related compounds

Copper phthalocyanine green 36 is a variant where some of the chlorine atoms are replaced with bromine.^[1]

Toxicity and hazards

There is evidence that exposure to phalocyanines can cause serious birth defects in developing embryos.^[2]

References

↑ Phthalo Green: How Can You Tell If It's Always the Same? 1/7/2003 , Dr. Richard M. Podhajny, Ph.D. , pffc-online.com
↑ "Sulphonated phthalocyanine induced caudal malformative syndrome in the chick embryo." (Abstract), Sandor S, Prelipceanu O, and Checiu I., U.S. National Library of Medicine National Institutes of Health

Shades of green

Apple green	Artichoke	Asparagus	Avocado	Bright green	British racing green	Brunswick green	Cal Poly green	Castleton green	Chartreuse

Cyan	Midnight green	Dark green	Dark moss green	Dark olive green	Dark spring green	Dartmouth green	Emerald	Fern green	Forest green

Green	Green-yellow	Harlequin	Hooker's green	Honeydew	Hunter green	India green	Islamic green	Jungle green	Kelly green

Laurel green	Lawn green	Light green	Lime	Lime green	Mantis	Malachite	Mint	Mint cream	Moss green

Myrtle green	Neon green	Office green	Olive	Olive drab	Pakistan green	Paris green	Persian green	Phthalo green	Pigment green

Pine green	Pistachio	Reseda green	Screamin' green	Sea green	Shamrock green	Spring bud	Spring green	Teal	Turquoise

Viridian	Yellow-green

A typical sample is shown for each name; a range of color-variations is commonly associated with each color-name.

This article is issued from Wikipedia - version of the 9/20/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.