Synthesis and Characterization of Quinacridone Violet (Pigment Violet 19): Process Optimization and Colorimetric Evaluation

Volume: 12 | Issue: 01 | Year 2026 | Subscription
International Journal of Polymer Science and Engineering
Received Date: 02/25/2026
Acceptance Date: 02/26/2026
Published On: 2026-03-21
First Page: 41
Last Page: 51

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By: Nikhil Nitin Badgujar and Nilesh Prakash Badgujar.

Student, Department of Chemical Technology, SRICT, UPL University of Sustainable Technology, Vataria, Gujarat, India

Professor & Head, Department. of Chemical Technology, SRICT, UPL University of Sustainable Technology, Vataria, Gujarat, India

Abstract

Objective: This study focuses on the synthesis and characterization of Quinacridone Violet (Pigment Violet 19), a high-performance organic pigment known for excellent lightfastness and durability. The research aims to optimize the manufacturing process and evaluate the colorimetric properties of the synthesized pigment. Methods: PV 19 was synthesized via a multi-step process involving condensation, oxidation/hydrolysis, and ring closure/cyclization reactions. Two experimental batches (MM#973-A1/B1 and MM#974-A1/B1) were prepared with varying mole ratios of raw materials including Aniline, Dimethyl succinosuccinate (DMSS), Methanol, and Sulfuric acid. The synthesized pigments were characterized using colorimetric parameters (DL, Da, Db, Dc, DH, DE) and percentage strength measurements under D65 10 Deg illuminant. Additional characterization included X-ray diffraction (XRD) for crystal form identification and Fourier-transform infrared spectroscopy (FTIR) for functional group analysis. Results: Batch MM#973-B1 demonstrated superior color characteristics with DE* value of 1.86 and percentage strength of 116.22%, indicating brighter and more intense violet hue compared to standard. Batch MM#974-B1 showed DE* value of 3.19 with 118.92% strength. XRD analysis confirmed the beta crystal form in violet-shaded samples and gamma form in reddish-violet samples. The beta crystal form produced violet-leaning hues while gamma form yielded reddish-violet shades. Negative Da* values indicated greener tones, while positive values corresponded to redder characteristics. FTIR spectra confirmed the characteristic quinacridone absorption bands at 1640 cm⁻¹ (C=O stretching) and 3250 cm⁻¹ (N–H stretching). Conclusion: The optimized synthesis parameters significantly influence the crystallographic form and resulting colorimetric properties of PV 19. Batch MM#973-B1 exhibited optimal color characteristics with minimal deviation from standard, making it suitable for high-performance coating and plastic applications. The solvent finishing process proved critical for achieving desired crystal modification and color properties.

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Citation:

How to cite this article: Nikhil Nitin Badgujar and Nilesh Prakash Badgujar Synthesis and Characterization of Quinacridone Violet (Pigment Violet 19): Process Optimization and Colorimetric Evaluation. International Journal of Polymer Science and Engineering. 2026; 12(01): 41-51p.

How to cite this URL: Nikhil Nitin Badgujar and Nilesh Prakash Badgujar, Synthesis and Characterization of Quinacridone Violet (Pigment Violet 19): Process Optimization and Colorimetric Evaluation. International Journal of Polymer Science and Engineering. 2026; 12(01): 41-51p. Available from:https://journalspub.com/publication/ijpse/article=25974

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