Delivering Excellence in Oligonucleotide Synthesis Since 1984

Oligonucleotide Service Overview

Since 1984, Bio-Synthesis has been a trusted partner to scientists worldwide, providing high-quality, custom-synthesized oligonucleotides for research, diagnostics, and therapeutic development.
With decades of expertise in oligo production, we offer a seamless path from early-stage research to full commercialization.

Our team of scientific experts operates within state-of-the-art, compliant facilities, ensuring that every product is delivered with precision, consistency, and in full alignment with customer specifications.

End-to-End Quality, Powered by Innovated Total QMS

Delivering high-quality oligonucleotides starts with a robust and integrated total quality control and management system.
At Bio-Synthesis, our proprietary software seamlessly manages the entire process—from order entry and production tracking to final product release and dispatch. This end-to-end system ensures that quality is monitored and maintained at every step, providing our customers with confidence, consistency, and excellence from start to finish.

  • All synthesis reagents are sourced from trusted suppliers and verified for quality before use.
  • Throughout the oligo synthesis process, trityl monitoring is applied to track coupling efficiency cycle by cycle.
  • Every oligonucleotide is routinely analyzed by analytical HPLC or PAGE to assess purity and is characterized by MALDI-TOF, LC-MS, or ESI mass spectrometry for identity confirmation.
  • Final quantification is performed twice via UV spectrophotometry, ensuring accurate and reliable yield reporting.
  • Our quality management system ensures consistency, traceability, and confidence in every oligo we deliver.

Customer Support You Can Count On

Expert

With over 40 years of expertise in oligonucleotide synthesis, Bio-Synthesis is uniquely equipped to handle even the most technically demanding custom biomolecules.

Partner

At Bio-Synthesis, our team of experienced Molecular Biologists and Chemists is here to support you at every stage — offering guidance in experimental design, application optimization, and technical troubleshooting.

Advocate

When you work with us, you're not just getting a product — you're gaining a partner in scientific success.

Guaranteed Quality

At Bio-Synthesis, our unwavering commitment to quality is reflected in every oligonucleotide we produce. We follow stringent quality assurance protocols to ensure reliability, consistency, and performance:

  • Mass Spectrometry (MALDI-TOF MS) is performed on all standard DNA, RNA, and siRNA to verify molecular integrity.
  • UV Spectrophotometry is used to quantify all nucleic acid products at least twice, unless otherwise specified.
  • Purification Options include HPLC, PAGE, RNase-Free HPLC, and RNase-Free PAGE for both DNA and RNA.
  • UPLC or Capillary Gel Electrophoresis (CGE) is applied for advanced quality analysis when appropriate.
  • Full QC documentation and custom method details are available upon request.

With over four decades of manufacturing excellence, we stand behind our promise of high-quality, application-ready oligonucleotides. Learn more about our Custom Process Developments

QC Documentation Available Upon Request

To support your regulatory and research needs, Bio-Synthesis provides comprehensive quality control documentation, including:

  • ✅ Mass Spectrometry Traces (MALDI-TOF, LC-MS, or ESI-MS)
  • ✅ UPLC or Capillary Gel Electrophoresis (CGE) Analysis
  • ✅ Purity Profiles for individual strands or duplexes
  • ✅ Certificate of Analysis (CoA)
  • ✅ Endotoxin Certification (for therapeutic materials)
  • ✅ Custom QC Reports tailored to your specifications

Our quality documentation ensures transparency, traceability, and confidence in every batch delivered. Learn more about our Custom Release Testing and QC

Quality Standards for Mid to Large Scale Oligonucleotide Synthesis (1 to 1000 gram)

At Bio-Synthesis, our our mid-scale oligo manufacturing process is designed to meet rigorous quality and regulatory standards. For all projects in the 1 to 1000 g range, we implement the following practices:

  • ✅ HPLC Purification is highly recommended to ensure optimal purity
  • ✅ Tangential Flow Filtration (TFF) is employed for effective salt removal
  • ✅ Comprehensive Batch Records are maintained for traceability and compliance
  • ✅ Endotoxin Testing is standard on all mid-scale synthesis orders
  • ✅ Each batch includes a Certificate of Analysis, with supporting data from
  • LC Mass Spectrometry (MS)
  • UPLC
  • Duplex Analysis
  • Endotoxin Assay
  • Sodium Content Analysis
  • Water Content Analysis
  • Bioburden Assay
  • UV Assay
  • MEC UV assay
  • Residual Solvent Analysis
  • Sterile Filtering
  • Timed Scheduled Stability TEst
  • and more...

Our robust mid to large scale synthesis platform ensures high-quality, reproducible results—ready for downstream development.

Seamless Scale-Up in One Location

Our state-of-the-art facility houses over 60 synthesizers, supporting the full spectrum of oligonucleotide production—from high-throughput small-scale plate synthesis to midscale and large-scale manufacturing—all under one roof.

Oligonucleotide synthesis machine

Delivering High-Purity Custom Oligos, Precisely to Your Specifications

At Bio-Synthesis, purification is a critical component of our oligonucleotide manufacturing process—ensuring optimal yield and exceptional purity. Our experienced chromatographers and process chemists utilize advanced high-pressure liquid chromatography (HPLC) techniques to consistently deliver high-quality oligos. We provide end-to-end, scientist-to-scientist collaboration—from project planning to final delivery— supporting quantities ranging from micrograms to hundreds of grams. This commitment reflects our customer-first philosophy and dedication to excellence.

Enhanced Purification Solutions

We offer industry-standard purification methods, including HPLC, reverse-phase, and ion-exchange chromatography. Additionally, our team can develop customized in-house protocols tailored to your specific yield and purity requirements.

Anion Exchange HPLC
Anion Exchange HPLC
Anion exchange chromatography is the preferred method for purifying oligonucleotides where charge-based separation yields optimal resolution—especially for unmodified sequences. This technique is highly effective for processing large quantities of oligos with simple, non-complex structures, offering both efficiency and high purity.
Purification Step 2
Purification Step 3
Reverse Phase HPLC
Reverse phase HPLC is the preferred method for separating oligonucleotides based on differences in hydrophobicity. It is especially effective for purifying synthetic oligos retaining the DMT group, as well as modified oligonucleotides conjugated with hydrophobic moieties such as dyes or biotin.
Reverse Phase HPLC
Reverse Phase HPLC Setup
Desalting
Desalting offers a rapid method for separating oligonucleotides from small residual compounds or truncated sequences. While it does not achieve the same purity levels as HPLC, it serves as an efficient alternative when faster turnaround is needed or when ultra-high purity is not critical.

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Custom Oligos, Engineered at the Core for Excellence

At the heart of our custom oligo solutions is an unwavering commitment to quality. From design to delivery, every step of our process is built to ensure precision, reliability, and performance—because your research deserves nothing less.

Our Commitment

At Bio-Synthesis , we are dedicated to delivering excellence through the following core principles:

Regulatory & Customer Compliance

We strictly adhere to all applicable customer, quality, safety, and environmental requirements to ensure regulatory integrity and client trust.

Customer Satisfaction & Feedback

We actively monitor satisfaction, respond to feedback, and implement improvements to consistently exceed expectations.

Continuous Improvement

We drive continual improvement across our processes, people, and systems by setting and reviewing measurable objectives to enhance our Quality Management System (QMS).

Why Choose Bio-Synthesis

Trusted by biotech leaders worldwide for over 40+ years of delivering high quality, fast and scalable synthetic biology solutions.