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Galactaric acid

Updated: 2026-07-21

Overview

Mucic acid, chemically known as galactaric acid, is an organic compound derived from the oxidation of galactose. It is a dicarboxylic acid with the formula C6H10O8 and is recognized for its role in various industrial applications. The compound is typically produced through the nitric acid oxidation of galactose or lactose. As a naturally occurring acid, mucic acid is found in small quantities in some fruits and vegetables. Its non-toxic and biodegradable nature makes it suitable for use in food and pharmaceutical industries. The acid is also valued for its ability to form stable complexes with metal ions, enhancing its utility in industrial processes.

Physical and Chemical Properties

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Mucic acid appears as a white crystalline powder with a density of approximately 1.6 g/cm³. It decomposes at temperatures between 225-230°C, making it stable under normal storage conditions. The compound is soluble in water and slightly soluble in ethanol, which facilitates its use in aqueous solutions. One of the key chemical properties of mucic acid is its ability to act as a chelating agent, forming stable complexes with metal ions such as calcium and iron. This property is exploited in various industrial applications, including water treatment and food preservation. The acid's non-hygroscopic nature ensures long-term stability when stored properly.

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Main Applications

Mucic acid is widely used in the pharmaceutical industry as an intermediate in the synthesis of other compounds, including those with antimicrobial properties. Its chelating ability makes it valuable in formulations where metal ion sequestration is required. In the food industry, mucic acid serves as a safe additive, often used to adjust acidity or as a stabilizer. It is also employed in the production of biodegradable polymers and resins, contributing to environmentally friendly material solutions. Additionally, its role in analytical chemistry as a reagent for metal detection highlights its versatility.

Safety and Storage

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Mucic acid is generally regarded as safe (GRAS) for use in food and pharmaceutical applications. However, proper handling procedures should be followed to avoid unnecessary exposure. Workers should use personal protective equipment (PPE) such as gloves and masks when handling the powder to prevent inhalation or skin contact. Storage conditions for mucic acid include keeping the compound in a cool, dry place away from strong oxidizers. The substance should be sealed in airtight containers to prevent moisture absorption. Shelf life is typically several years when stored under recommended conditions.

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B2B Procurement Guide

When procuring mucic acid for industrial use, buyers should prioritize suppliers who provide certificates of analysis (CoA) to verify purity (typically ≥98%). Packaging options such as 25kg bags or drums are common, and bulk purchases may offer cost advantages. It is advisable to assess supplier reliability by checking for ISO or other relevant certifications. Buyers should also consider logistical factors such as lead times and storage requirements. Price negotiations should account for purity levels, packaging, and order volumes, with reference prices commonly ranging between $20-$50/kg.

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