Comments on - Growth and characterization of organic nonlinear optical crystal: L-Valinium salicylate (LVS) [Optik 125 (2014) 2713-2715]

TL;DR

This paper critically examines previous claims about the growth of L-Valinium salicylate crystals, revealing that only salicylic acid crystallizes under the described conditions, challenging earlier reports.

Contribution

It provides a clarification and correction to prior research by demonstrating that L-valine and salicylic acid do not form L-Valinium salicylate crystals during slow evaporation.

Findings

Salicylic acid crystallizes from the solution.

L-Valinium salicylate does not form under the experimental conditions.

Previous reports of L-Valinium salicylate formation are incorrect.

Abstract

The slow evaporation of an aqueous solution containing L-valine and salicylic acid results in the fractional crystallization of salicylic acid and not any so called L-valinium salicylate as reported recently by Andal and Murugakoothan in the title paper.