Valliappan Kannappan

Episode 4: From Peak to Standard: Preparative Isolation of Chiral Impurities

Leave a Comment / Chiral Chromatography, Chiral HPLC Analysis, Chiral science / By / , , / August 19, 2026

“Turning an analytical separation into an isolated, characterised, defensible impurity standard” Why isolate a chiral impurity at all Analytical scientists ask for isolated chiral impurities when a chromatogram is no longer enough. The reasons are concrete: structural elucidation of an unknown peak, preparation of a reference standard, response-factor determination, qualification under ICH impurity expectations, forced-degradation …

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Episode 3: State of the Art: Selectors, SFC, Speed, and Sensible Automation

Leave a Comment / Chiral Chromatography, Chiral HPLC Analysis, Chiral science / By / , , , / August 13, 2026

What modern chiral separation science can do now, and where the honest limits still lie The present technology landscape The most useful framing of the current landscape is that it is no longer sensible to ask, in the abstract, whether chiral HPLC or chiral SFC is “the best” approach. Modern laboratories operate with both, or …

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Episode 2: Developing a Chiral HPLC Method: A Structure-Led Workflow

Leave a Comment / Chiral Chromatography, Chiral HPLC Analysis, Chiral science / By / , , , / August 8, 2026

From a structural diagnosis of the analyte to a defendable, robust, lifecycle-ready method Start with the molecule, not the column catalogue A credible chiral method does not begin with random column screening. It begins with a short structural diagnosis of the analyte and the likely impurity set. The pKa values indicate whether the analyte is …

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Episode 1: Why Chirality Still Matters: Stereochemistry as a Critical Quality Attribute

Leave a Comment / Chiral HPLC Analysis, Chiral science, Chiral Separation, Chirality / By / , , , / August 2, 2026

The pharmaceutical meaning of chirality, the real impurity space, and where chiral HPLC fits The pharmaceutical meaning of chirality Chirality matters in drug development for a simple reason. Biological systems are chiral, so the body does not experience two stereoisomers as the same molecule. FDA stated this explicitly in its landmark 1992 stereoisomer guidance, noting …

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Episode 10: Future Directions in Chiral Agrochemistry

Leave a Comment / Chiral Agrochemistry, Chiral science, Chirality / By / , , / July 7, 2026

Introduction Chirality has already transformed how agrochemicals are designed, evaluated, and applied. From the early reliance on racemic formulations to today’s enantiopure products such as metalaxyl-M, the trajectory shows a clear shift toward stereochemistry as a cornerstone of innovation. The future of chiral agrochemistry lies at the intersection of asymmetric synthesis, biocatalysis, computational design, and …

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Episode 9: Regulatory and Industrial Perspectives on Chiral Agrochemicals

Leave a Comment / Chiral Agrochemicals, Chiral science / By / , , / June 22, 2026

Introduction The development and use of chiral agrochemicals are not governed by science alone. Policy frameworks, regulatory guidance, and industrial strategy all play decisive roles in shaping how stereochemistry is addressed in crop protection. Over the past three decades, regulators have recognized that enantiomers can differ dramatically in efficacy, toxicity, and environmental fate. This recognition …

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Episode 8: Sustainable Pest Management and Chirality

Leave a Comment / Chiral Agrochemicals, Chiral science / By / , , / June 16, 2026

Precision at the Molecular Level, Sustainability in the Field 🌱 Introduction Sustainable agriculture aims to balance crop productivity with environmental protection and food safety. Agrochemicals play a central role in pest management, but their widespread use has raised concerns about resistance, biodiversity loss, and long-term ecological impacts. Chirality offers a path toward sustainability because enantiopure …

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Episode 7: Toxicity and Food Safety Considerations of Chiral Agrochemicals

Leave a Comment / Chiral science / By / , , / June 11, 2026

When Molecular Handedness Shapes Food Safety: Understanding the Hidden Side of Agrochemical Toxicity. Introduction The toxicity of agrochemicals is a central concern for agriculture, food security, and public health. Chiral agrochemicals complicate this issue further because their enantiomers often differ in both biological activity and toxicological effects. While one enantiomer may efficiently control pests, the …

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Episode 6: Environmental Impact of Chiral Agrochemicals

Leave a Comment / Chiral Agrochemicals, Chiral Agrochemistry, Chiral science / By / , / June 5, 2026

🌍 From Soil to Streams: How Molecular Handedness Shapes Environmental Fate. Introduction When agrochemicals are applied in the field, they do not remain confined to the crops they are intended to protect. They enter soil, water, and air, where they interact with complex ecosystems. For chiral agrochemicals, these interactions are influenced not only by chemical …

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Episode 5: Natural Products as Chiral Templates

Leave a Comment / Chiral Agrochemicals, Chiral science / By / , , / June 1, 2026

🌿 Nature’s Handedness, Agriculture’s Inspiration. Introduction Nature is the ultimate chemist, and chirality is one of its most powerful design principles. Many of the most effective agrochemicals are inspired by or derived directly from natural compounds, which are overwhelmingly chiral. These natural products serve as templates for synthetic agrochemistry, guiding the development of pesticides, herbicides, …

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