For chemists and product developers, a thorough understanding of a chemical compound's properties is the bedrock of successful application and innovation. D-Malic Acid (CAS 636-61-3), a vital chiral organic acid, possesses a unique set of characteristics that make it indispensable in various high-tech industries, particularly pharmaceuticals and food science. Ningbo Inno Pharmchem Co., Ltd. provides insight into these critical d-malic acid properties.

Chemically, D-Malic Acid is known as D-(+)-Malic acid or (R)-2-hydroxybutanedioic acid. Its molecular formula is C4H6O5, and it has a molecular weight of 134.09 g/mol. The compound features a hydroxyl group (-OH) and two carboxylic acid groups (-COOH) on a four-carbon chain. The presence of a chiral center at the second carbon atom dictates its specific stereochemical configuration, denoted as 'D' or '(R)'. This chirality is central to its most significant applications, especially in d-malic acid pharmaceutical synthesis.

Physically, D-Malic Acid typically presents as a white crystalline powder. This form is stable under appropriate storage conditions, which include keeping it airtightly in a light-proof, dry, and cool place. The purity of D-Malic Acid, commonly assayed at 99.0% or higher, is a testament to its suitability for demanding applications. This high purity ensures that any impurities are minimized, which is critical for reproducible results in complex chemical reactions and for meeting regulatory standards in food and pharmaceutical products.

The d-malic acid properties also include its solubility characteristics and reactivity. It is readily soluble in water, with a solubility of approximately 558 g/L at 20 °C. The compound exhibits acidic properties due to its carboxylic acid groups, with pKa values of approximately 3.40 and 5.20. This acidity is exploited when it is used as a d-malic acid food additive to impart tartness and act as a pH regulator.

Furthermore, the specific rotation of D-Malic Acid, typically measured as [α]D20℃ between 1.6 to 2.6, serves as a key indicator of its enantiomeric purity. Other important properties include stringent limits on impurities such as sulfate, chloride, heavy metals (like lead), fumaric acid, and maleic acid, all of which are tightly controlled in high-grade D-Malic Acid. These detailed specifications ensure that the compound performs reliably as a d-malic acid chiral pool.

In summary, understanding the multifaceted d-malic acid properties is crucial for leveraging its full potential. From its crystalline appearance and high purity to its specific optical rotation and reactivity, each characteristic plays a role in its effectiveness. Whether applied in sophisticated pharmaceutical synthesis or to enhance food products, the well-defined nature of D-Malic Acid (CAS 636-61-3) makes it a highly valued and reliable chemical ingredient.