Overview
Threitol, also known as erythritol or meso-erythritol, is a four-carbon sugar alcohol derived from the reduction of erythrose. It is naturally found in small amounts in fruits like grapes and melons, as well as in fermented foods. Threitol is widely used in the food, pharmaceutical, and cosmetic industries due to its sweet taste, low caloric content, and non-cariogenic properties. Its stability under high temperatures makes it suitable for baked goods and other heat-processed foods. In addition to its role as a sweetener, threitol acts as a humectant, helping to retain moisture in cosmetics and personal care products. Its non-toxic and non-allergenic nature has led to its approval by regulatory bodies such as the FDA and EFSA for use in various applications. The compound is also used in pharmaceuticals as a stabilizer and excipient, particularly in chewable tablets and syrups.
Physical and Chemical Properties
Threitol is a white, odorless crystalline powder with a sweet taste similar to sucrose but with only 60-70% of its sweetness. It has a molecular weight of 122.12 g/mol and a density of 1.45 g/cm³. The compound melts at 121-123 °C and boils at 329 °C, demonstrating high thermal stability. Threitol is highly soluble in water, with a solubility of approximately 37 g/100 mL at room temperature, and slightly soluble in ethanol. One of the key properties of threitol is its low caloric content, providing only 0.2 calories per gram compared to 4 calories per gram for sucrose. This is due to its poor absorption in the small intestine, with about 90% excreted unchanged in the urine. Threitol also exhibits hygroscopicity, making it useful as a humectant in products requiring moisture retention. Its non-reducing nature ensures it does not participate in Maillard reactions, which is beneficial for maintaining product color and flavor during processing.
Main Applications
Threitol is primarily used as a sugar substitute in low-calorie and sugar-free food products, including candies, chocolates, chewing gum, and baked goods. Its cooling effect in the mouth, similar to menthol, enhances the sensory profile of products like mints and breath fresheners. In the pharmaceutical industry, threitol serves as an excipient in chewable tablets, syrups, and lozenges, providing sweetness without contributing to dental caries or blood sugar spikes. In cosmetics and personal care, threitol functions as a humectant in moisturizers, lotions, and creams, helping to maintain skin hydration. It is also used in oral care products like toothpaste and mouthwash due to its non-cariogenic properties. Additionally, threitol finds applications in chemical synthesis as a building block for more complex molecules. Its stability and solubility make it a versatile ingredient in various industrial formulations.
Safety and Storage
Threitol is generally recognized as safe (GRAS) by the FDA and EFSA, with no known toxicity or allergenic effects. However, excessive consumption may lead to mild gastrointestinal discomfort, such as bloating or diarrhea, due to its osmotic effect in the gut. The recommended daily intake is up to 1 gram per kilogram of body weight, though individual tolerance may vary. For storage, threitol should be kept in a cool, dry place away from moisture and direct sunlight to prevent caking or degradation. It is stable under normal conditions but should be protected from extreme temperatures. Bulk quantities are typically packaged in multi-layer paper bags or lined containers to maintain purity and prevent contamination. Proper handling includes using gloves and eye protection to avoid irritation, though threitol is not classified as a hazardous material.
B2B Procurement Guide
When procuring threitol for industrial or commercial use, buyers should prioritize suppliers that provide certificates of analysis (CoA) to verify purity, which should be ≥98% for most applications. Food-grade or pharmaceutical-grade threitol is essential for products intended for human consumption. Buyers should also confirm compliance with relevant standards such as USP, EP, or FCC, depending on the intended use. Pricing varies based on quantity, purity, and supplier, with bulk purchases typically offering cost savings. Common packaging options include 25 kg bags, 1-ton super sacks, or customized containers for large-scale industrial use. Lead times and minimum order quantities (MOQs) should be clarified with suppliers to ensure timely delivery. Additionally, buyers may consider sourcing from manufacturers with ISO or HACCP certifications to guarantee quality and consistency.
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