DL-Malic acid, with its chemical formula C4H6O5 and a molecular weight of 134.09, stands as a white or nearly white crystalline powder or granules, renowned for its distinct sour taste. This organic compound is found naturally in numerous fruits, most notably apples, from which it derives its name (from the Latin 'mālum'). Beyond its natural occurrence, DL-Malic acid is also industrially synthesized, offering a versatile chemical with a broad spectrum of applications across various sectors.

One of its most prominent roles is within the food and beverage industry. As an internationally recognized safe food additive (E296), DL-Malic acid serves as an effective souring agent, preservative, and pH modifier. Its acidity profile is characterized by a soft, lasting sourness, often described as 20% stronger than that of citric acid. This makes it an ideal ingredient for enhancing flavors in soft drinks, candies, jellies, jams, and dairy products. It also acts as an acid stabilizer and color retention agent, and is particularly valued in wine brewing for its ability to remove tartrate, contributing to a balanced taste profile in various food and drink formulations.

The utility of DL-Malic acid extends significantly into the pharmaceutical sector. It is employed in compounding troches and syrups, imparting a pleasant fruit taste that can aid in the absorption and diffusion of medications within the body. Furthermore, its chemical structure makes it invaluable in the preparation of chiral compounds, including those related to κ-opioid receptors, and for chiral resolution in ligand-exchange capillary electrophoresis. Clinical trials have even explored its potential in treating conditions such as xerostomia (dry mouth), depression, and hypertension, underscoring its therapeutic promise.

In the personal care and cosmetic industries, DL-Malic acid is prized for its alpha-hydroxy acid (AHA) properties. It acts as a gentle exfoliant, promoting skin cell turnover which can lead to a smoother, brighter complexion. It is frequently incorporated into skincare products to address concerns like fine lines, wrinkles, hyperpigmentation, acne, and even large pores, improving overall skin texture and elasticity. Its use as a complexing agent also finds application in daily chemical products like toothpaste, spice synthesis, and as an ingredient in deodorants and detergents.

Beyond these applications, DL-Malic acid also contributes to several health benefits. As a key intermediate in the Krebs cycle (citric acid cycle), it plays a crucial role in cellular energy production, supporting overall vitality and potentially aiding in the reduction of fatigue, including symptoms associated with chronic fatigue syndrome and fibromyalgia. Studies suggest its involvement in enhancing mineral absorption, such as with magnesium malate, and its potential in kidney stone prevention by increasing urinary citrate levels. Its ability to stimulate saliva production makes it beneficial for oral health, while its presence in certain foods can even boost iron absorption.

DL-Malic acid is considered generally safe for consumption within food and beverage guidelines, being affirmed as GRAS (Generally Recognized As Safe) by regulatory bodies. It is highly soluble in common solvents like water, acetone, ether, methanol, and ethanol, which facilitates its integration into diverse product formulations. However, it is important to note its incompatibility with strong bases, oxidizing agents, reducing agents, and alkali metals, which are critical considerations for safe handling and storage.

When considering the acquisition of this versatile compound, seeking a reliable manufacturer or supplier is paramount to ensure quality and consistency. To effectively buy DL-Malic acid for industrial or commercial applications, it is advisable to engage with established chemical providers who can offer detailed product specifications and competitive price options. Companies aiming to purchase in bulk or requiring specific grades will find that direct communication with reputable chemical producers yields the best results for their supply chain needs.