Deoxycytidine

Updated: 2026-09-16

Overview

Deoxycytidine is a fundamental nucleoside that forms part of DNA's structure, where it pairs with deoxyguanosine via hydrogen bonds. Biochemically, it consists of cytosine attached to a deoxyribose sugar through a β-N1-glycosidic bond. This compound is naturally occurring in all living organisms and serves as a precursor in nucleotide synthesis pathways. In pharmaceutical contexts, deoxycytidine derivatives are crucial for developing antiviral medications (e.g., HIV therapies) and anticancer agents. Its modified forms, such as cytarabine, are clinically approved chemotherapeutic drugs that interfere with DNA replication in rapidly dividing cancer cells.

Physical and Chemical Properties

Deoxycytidine appears as a white crystalline solid with moderate water solubility due to its polar hydroxyl and amine functional groups. It exhibits UV absorption maxima at 280 nm (pH-dependent), a characteristic feature useful for analytical quantification. The compound is stable under neutral pH but may degrade under strongly acidic or alkaline conditions. The melting point with decomposition around 210-215°C reflects its thermal sensitivity, requiring careful handling during lyophilization or high-temperature processes. Its chiral nature (specific rotation [α]D +36°) is critical for biological activity, as only the D-enantiomer is metabolically functional in DNA synthesis.

Main Applications

In biotechnology, deoxycytidine is essential for PCR reagent preparation and oligonucleotide synthesis. It serves as a raw material for manufacturing nucleoside analogs like zalcitabine (anti-HIV) and gemcitabine (anticancer), which incorporate modified sugar or base moieties to disrupt viral/cellular DNA replication. The pharmaceutical industry utilizes high-purity deoxycytidine (≥99%) in preclinical studies and formulation development. Research-grade quantities are commonly supplied in milligram to kilogram scales, with GMP-grade material required for therapeutic production. Emerging applications include mRNA vaccine development and epigenetic studies involving DNA methylation patterns.

Safety and Storage

Deoxycytidine presents low acute toxicity (LD50 >2000 mg/kg oral, rat) but requires standard laboratory precautions including gloves and protective eyewear. Prolonged exposure to moisture or light may cause degradation, evidenced by yellow discoloration or reduced HPLC purity. Long-term storage recommendations include desiccated conditions at 2-8°C under inert gas (argon/nitrogen) for bulk quantities. Small working aliquots should be prepared to minimize freeze-thaw cycles. Compatibility testing is advised when combining with strong oxidizers or heavy metal salts in formulation processes.

B2B Procurement Guide

Industrial buyers should verify supplier qualifications including ISO 9001 certification and batch-to-batch consistency reports. Key specifications include: HPLC purity (typically 98-99.5%), residual solvent levels (meeting ICH Q3C guidelines), endotoxin content (<0.1 EU/mg for injectable applications), and chiral purity (>99.5% D-isomer). Bulk orders (1kg+) often attract 15-30% price discounts, with lead times varying from 2-8 weeks depending on customization needs. Preferred packaging includes double polyethylene bags within sealed drums for >1kg quantities, or amber glass vials with tamper-evident seals for research quantities. Logistics should maintain cold chain integrity for international shipments.