Pigment Violet 23
[CAS# 6358-30-1]

Identification

• Classification: Dyes and pigments >> Pigment
• Name: Pigment Violet 23
• Synonyms: 9,19-Dichloro-5,15-diethyl-5,15-dihydro-diindolo[2,3-c:2',3'-n]triphenodioxazine; C.I. 51319; Permanent Violet RL
• Molecular Formula: C₃₄H₂₂Cl₂N₄O₂
• Molecular Weight: 589.47
• CAS Registry Number: 6358-30-1 (215247-95-3)
• EC Number: 228-767-9
• SMILES: CCN1C2=CC=CC=C2C3=CC4=C(C=C31)OC5=C(C6=NC7=C(C=C8C(=C7)C9=CC=CC=C9N8CC)OC6=C(C5=N4)Cl)Cl

Properties

• Density: 1.5±0.1 g/cm³, Calc.^*, 1.53
• Melting point: 385 °C (dec.)
• Index of Refraction: 1.788, Calc.^*

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software.

Safety Data

• Hazard Symbols: GHS07 Warning
• Risk Statements: H302-H315-H319-H335
• Safety Statements: P261-P280-P301+P312-P302+P352-P305+P351+P338

Discovery and Applications

Pigment Violet 23, also known as Dioxazine Violet or PV23, is a synthetic organic pigment widely used in various industrial applications due to its vibrant and stable color properties. Discovered in the early 20th century, this pigment has become a staple in the colorant industry, valued for its deep purple hue and excellent lightfastness.

The development of Pigment Violet 23 began with the synthesis of dioxazine derivatives, which are characterized by their complex aromatic structures. The key to its synthesis is the dioxazine ring system, which provides the pigment with its intense color. The production process typically involves the condensation of 1,4-diamino-2,5-dichlorobenzene with a dioxazine compound, followed by various chemical modifications to achieve the desired color and stability.

One of the primary applications of Pigment Violet 23 is in the art supplies industry. It is commonly used in artist paints, such as oils and acrylics, where its vivid color and high permanence are highly valued. The pigment's excellent resistance to light and chemicals ensures that artworks maintain their vibrant appearance over time, making it a preferred choice among professional artists.

In addition to its use in art supplies, Pigment Violet 23 is employed in the production of high-quality inks and coatings. It is used in printing inks for packaging and publications, where its strong color payoff and stability are crucial for producing sharp, long-lasting images. The pigment's resistance to fading and chemical degradation makes it suitable for various applications where durability is essential.

Pigment Violet 23 also finds applications in the textile industry, where it is used to dye fabrics and materials. Its ability to retain color and resist washing and light exposure makes it a valuable choice for producing high-quality, long-lasting textiles. The pigment is used in both synthetic and natural fibers, providing a rich purple color that enhances the aesthetic appeal of textiles.

The versatility of Pigment Violet 23 extends to its use in plastics and rubber products, where it imparts a consistent and durable color. Its stability under various conditions ensures that products maintain their appearance and quality, making it suitable for a range of consumer goods and industrial applications.

Overall, Pigment Violet 23 is a significant pigment in the colorant industry due to its intense color, stability, and versatility. Its applications span from artistic uses to industrial and consumer products, highlighting its importance in modern color technology.

References

2007. Pigment Violet 19, Pigment Violet 23. Springer Lexikon Kosmetik und Körperpflege.
DOI: 10.1007/978-3-540-71095-0_7986

2018. Assessment of Toxic Metals and Hazardous Substances in Tattoo Inks Using Sy-XRF, AAS, and Raman Spectroscopy. Biological Trace Element Research, 187(2).
DOI: 10.1007/s12011-018-1406-y

2022. Aqueous dispersing mechanism study of nonionic polymeric dispersant for organic pigments. Colloid and Polymer Science, 300(2).
DOI: 10.1007/s00396-021-04937-z