Ascorbic Acid (L-Ascorbic Acid) | CAS 50-81-7 | Water-Soluble Vitamin (Research Use Only) | Knowlux

Product Summary

Knowlux supplies L-ascorbic acid as a purified water-soluble vitamin and antioxidant reference material for laboratory research, assay calibration and formulation pre-studies. The substance is a white crystalline powder with a mild acidic taste, freely soluble in water, and is the most biologically active form of vitamin C. Each consignment ships with a batch-tied analytical file (COA, SDS, chromatograms and origin documentation) so the material can be traced from container to bench.

Specification Sheet

Grade Distinction

Two grades circulate under the same CAS number and are not interchangeable for regulated applications:

Analytical Release

Each batch is released with the chromatogram or titration data generated for that lot, not a generic specification sheet.

Handling and Storage

Keep containers tightly closed, protected from light, and stored in a dry, cool place. Working solutions in water should be prepared fresh and used promptly; if brief storage is unavoidable, keep on ice and exclude air. Discolouration toward yellow or brown indicates oxidation and loss of potency. Sealed, light-protected storage at 2-8 C supports the retest period stated on the COA; exposure to humidity above the deliquescence point causes caking and rapid degradation.

Research Applications

• Certified reference material for vitamin C quantification in food and biological matrices

• Antioxidant capacity assay calibration (DPPH, ABTS, FRAP)

• Reducing agent for nanoparticle synthesis and graphene oxide reduction

• Cell culture media supplementation and oxidative stress model studies

• Formulation stability screening for aqueous vitamin preparations

• Analytical method validation for HPLC and titration platforms

Documentation and Traceability

Each lot is released against its own file: certificate of analysis, safety data sheet, certificate of origin, residual-solvent statement (on request), and a stability/retest note. Method-transfer packages and supplier audit support are available project by project.

Packing and Dispatch

Primary containment: amber glass vial or high-barrier aluminium pouch with tamper-evident seal. Secondary containment: light-blocking carton with desiccant. Shipments leave Hubei within the quoted lead time, ambient by default, with cold packs where route or season requires. Export documents (invoice, packing list, COA, SDS, origin certificate) are prepared before dispatch.

About Knowlux

Knowlux Biotechnology operates from Hubei, China, as a GMP-oriented supplier of peptides, active substances and fine-chemical research compounds. Customers include academic laboratories, CDMOs, formulation developers and distributors in more than 40 countries. Beyond catalogue supply, we handle custom synthesis, bespoke pack sizes and documentation packages built to a client’s audit template.

Compliance and Use Restriction

This material is released strictly for laboratory research use. It must not be administered to humans or animals, must not be used in diagnosis or therapy, and is not offered for retail, personal or household use.

Ascorbic acid is authorised in many jurisdictions as a food additive (antioxidant, E 300), a food fortification nutrient, and a pharmaceutical active substance. Those regulatory positions attach to compliant food- and pharmaceutical-grade supply chains and do not apply to, and are not represented by, this research-grade lot.

Statements describing published research are scientific background only. They are not medical advice, not a health claim, and not dosing or therapeutic guidance.