For B2B professionals in the chemical, pharmaceutical, and food manufacturing sectors, understanding the precise specifications of raw materials is crucial for ensuring product quality, efficacy, and safety. D-Xylose (CAS 58-86-6), also known as wood sugar, is a versatile monosaccharide with a range of industrial applications, and its quality is defined by several key parameters. Sourcing this ingredient from a reputable manufacturer means having access to detailed technical data.

The primary specification for D-Xylose is its assay or purity. Typically, food-grade and industrial-grade D-Xylose will have a minimum purity of 98.5% or higher, often reaching 99.0% to 102.0% as per some specifications. This high purity is critical for its function in flavor development through Maillard reactions and for its conversion into other compounds like xylitol. Manufacturers must ensure their D-Xylose supplier can consistently meet these purity requirements.

Another vital characteristic is the specific optical rotation, denoted as ([α]20/D). For D-Xylose, this value typically falls within the range of +18.5 to +19.5 degrees. This optical property is a direct indicator of the enantiomeric purity of the D-isomer and is essential for applications where stereochemistry matters, such as in pharmaceutical intermediates or specific biochemical research. A reliable supplier will provide lot-specific optical rotation data.

Physical properties also play a significant role. D-Xylose presents as a White crystalline powder. Its melting point is a key indicator of purity, generally falling between 145-150°C or 147-151°C depending on the grade and specific standards. Loss on drying, typically limited to a maximum of 0.5% or even lower (≤0.3%), indicates minimal moisture content, which is important for product stability and shelf life. Residue on ignition, a measure of inorganic impurities, is also kept very low, often below 0.05% or 0.1%.

Furthermore, specifications for heavy metals (e.g., Lead ≤0.001% or ≤0.5ppm, Arsenic ≤0.0001% or ≤0.5ppm) and other trace contaminants like sulfates and chlorides are crucial, especially for food and pharmaceutical applications. For instance, Chloride content should not exceed 0.033% or 100ppm, and Sulphate ash should be ≤0.05%.

For procurement professionals and R&D scientists, a clear understanding of these specifications allows for informed purchasing decisions and ensures that the D-Xylose procured will perform optimally in their intended applications. When you buy D-Xylose from a trusted China manufacturer, you can expect comprehensive documentation and adherence to these critical quality parameters. If you are looking for a reliable supplier of industrial-grade D-Xylose, inquire about our detailed product specifications and request a quote today.