Overview
Kestose Standard is a certified reference material comprising the trisaccharide 1-kestose, a naturally occurring fructooligosaccharide (FOS). As a standard, it serves as a critical benchmark in analytical methods development and quality assurance processes, particularly in the food and nutraceutical industries. The compound is structurally characterized by a glucose molecule linked to two fructose units via β(2→1) bonds. In industrial contexts, kestose standards are indispensable for validating testing protocols for functional foods containing prebiotic fibers. Manufacturers rely on these standards to calibrate instruments like HPLC systems, ensuring accurate quantification of FOS in products such as infant formula, dietary supplements, and fermented dairy products.
Physical and Chemical Properties
Kestose exhibits typical carbohydrate properties with a sweet taste (about 30% as sweet as sucrose) and hygroscopic behavior. Its crystalline form remains stable under recommended storage conditions but may undergo Maillard reactions at elevated temperatures. The compound's molecular weight of 504.44 g/mol and specific optical rotation [α]D20 +28° to +32° (c=1 in water) are key identification parameters. Chromatographic purity is a critical specification, with premium-grade standards achieving ≥98% by HPLC-ELSD analysis. The substance shows excellent water solubility (up to 500 mg/mL at 25°C) but limited organic solvent compatibility. Thermal gravimetric analysis typically shows decomposition beginning around 160°C without a distinct melting point.
Main Applications
The primary use of kestose standard lies in analytical laboratories performing FOS quantification in complex matrices. Food manufacturers employ it to validate nutritional labeling claims for prebiotic content, especially in products targeting gut health benefits. Pharmaceutical researchers utilize the standard in pharmacokinetic studies of oligosaccharide absorption. In academic settings, the standard supports investigations into the bifidogenic effects of FOS on intestinal microbiota. Recent applications extend to sports nutrition research, where kestose's potential as a low-glycemic carbohydrate source is being explored. Agricultural scientists also use it as a marker compound in honey authenticity testing.
Safety and Storage
Kestose standard presents minimal safety risks under normal handling conditions. The material is not classified as hazardous under GHS criteria, though standard laboratory precautions (gloves, eye protection) are recommended to prevent contamination. No special ventilation is required for routine use. Proper storage is essential for maintaining stability. The standard should be kept in its original sealed container with desiccant at controlled refrigeration temperatures (2-8°C). Prolonged exposure to humidity can cause clumping and potential degradation. For long-term storage beyond two years, nitrogen-purged vials or vacuum-sealed packaging may be considered.
B2B Procurement Guide
B2B buyers should prioritize suppliers that provide comprehensive characterization documents, including NMR spectra, mass spectrometry data, and chromatographic purity certificates. Minimum order quantities typically range from 10mg for R&D purposes to 100g for large-scale quality control operations. Key procurement considerations include verification of the standard's traceability to NIST reference materials (where applicable) and confirmation of stability data for the specific batch. Some manufacturers offer customized certificates of analysis with additional parameters like water content (Karl Fischer) and residual solvent analysis. Lead times for specialty grades can range from 2-6 weeks depending on purification requirements.
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