Bismuth citrate, with the CAS number 813-93-4, is a versatile inorganic compound that plays a significant role in both the food and pharmaceutical industries. This white crystalline powder, chemically represented as C6H5BiO7, is derived from bismuth—a rare element primarily recovered as a by-product of lead and copper ore processing. In recent years, bismuth citrate has gained considerable attention for its wide range of applications, particularly in food additives, pharmaceutical formulations, and healthcare products.

Chemical Properties of Bismuth Citrate

Bismuth citrate appears as a white to off-white crystalline solid that is relatively stable under normal conditions. The compound is characterized by its unique ability to form complexes with various organic molecules, which contributes to its versatility in different applications. As a citrate salt, it contains the citrate(3-) ion, making it compatible with biological systems and food formulations.

The compound exhibits excellent solubility in certain solvents and can form colloidal solutions when properly dispersed. This property is particularly important in pharmaceutical applications where consistent bioavailability is essential. The molecular weight of bismuth citrate is approximately 397.1 g/mol, and it maintains stability under recommended storage conditions.

Primary Applications and Uses

Aplicaciones farmacéuticas

In the pharmaceutical industry, bismuth citrate serves as a crucial ingredient in medications targeting gastrointestinal disorders. One of its most notable applications is in the treatment of:

• Peptic ulcers: Bismuth compounds have been used for decades to promote mucosal healing and provide protective barriers in the gastrointestinal tract.
• Helicobacter pylori infection: Bismuth citrate exhibits bactericidal properties that help eradicate H. pylori bacteria, a major cause of stomach ulcers and gastritis.
• Gastritis and dyspepsia: The compound’s anti-inflammatory effects help alleviate symptoms associated with digestive conditions.
• Colitis and wound infections: Antimicrobial properties make it effective in managing various inflammatory bowel conditions.

The mechanism of action involves bismuth ions displacing nickel and other metals from active sites of bacterial enzymes, thereby disrupting the bacteria’s acid-neutralization capacity and energy metabolism. This makes bismuth citrate particularly effective against resilient bacteria like H. pylori.

Food Additive Applications

As a food additive, bismuth citrate is valued for its functional properties:

• Food preservation: Its antimicrobial properties help extend shelf life of certain food products.
• Nutritional supplements: Used in dietary supplement formulations for digestive health support.
• pH regulation: Can function as a buffering agent in food systems.
• Flavor stabilization: Helps maintain consistent product characteristics.

Otras aplicaciones industriales

Beyond food and pharmaceuticals, bismuth citrate finds applications in:

• Cosmetic and personal care products: Its antimicrobial properties make it useful in oral healthcare products.
• Chemical synthesis: Serves as a catalyst in various organic synthesis reactions.
• Water treatment: Explored for antimicrobial applications in water purification systems.

Safety and Regulatory Status

This article did not identify a substance-specific basis for the earlier blanket GRAS and safe-consumption claims, so those claims and the associated dosing range have been withdrawn. The FDA food-use framework concerns particular intended uses; it cannot be generalized to every bismuth salt or raw material. Verify the exact identity, intended use and supporting regulatory record.

However, as with any food additive or pharmaceutical ingredient, it is essential to:

• Follow recommended dosage guidelines
• Consult healthcare professionals before use in therapeutic applications
• Adhere to local regulatory requirements for specific uses
• Consider potential interactions with other compounds

Conclusión

Bismuth citrate (CAS 813-93-4) represents a valuable compound with diverse applications across multiple industries. Its unique combination of antimicrobial, anti-inflammatory, and protective properties makes it an essential ingredient in pharmaceutical formulations for digestive health, food additives for preservation, and various industrial applications. As research continues to explore its full potential, bismuth citrate remains a significant compound in the global chemical marketplace.

For businesses seeking high-quality bismuth citrate for food additive or pharmaceutical applications, sourcing from reputable manufacturers who comply with international quality standards is essential. The compound’s proven safety profile and versatile functionality continue to drive its adoption in new and innovative applications.

Correction: 10 September 2026. Withdrew unsupported blanket food-safety and oral-dose claims for bismuth citrate. This is a targeted claim correction; other historical statements still require their own supporting evidence.