Fine Chemicals & Nucleoside Building Blocks
From R&D to Scale-Up
Building Blocks for Oligonucleotide Innovation
Explore phosphoramidites, protected and modified nucleosides, LNA/FNA building blocks and specialty oligonucleotide modifiers.
Need a Compound Beyond the Catalog?
Share your target structure, specification, quantity and timeline with our team for technical evaluation and sourcing support.
Why Orihar
Orihar is a Shanghai-based, technology-driven chemical company specializing in nucleoside building blocks, pharmaceutical intermediates, and custom chemistry for pharmaceutical, biotechnology, and research customers worldwide.
We combine chemistry expertise, process development, quality-focused execution, and flexible supply—from catalog products and custom synthesis to scale-up support—to help customers move projects forward with confidence.
100 +
Specialty Products & Building Blocks
1000 +
kg to MT Scalable Manufacturing
20 +
Years of R&D Expertise
5000
㎡ GMP Production Workshop
Our Main Focus
Sustainability
We believe that chemistry has a critical role to play in achieving greater sustainability. We are determined to move forward in this respect.
Innovation
Our innovation focus is on developing new products and solutions that help our customers achieve their sustainability goals.
Digitalization
We want to leverage the diverse growth potential of digitalization and seize the associated opportunities.
Our Core Eexpertist
Nucleoside Chemistry
We provide DNA and RNA phosphoramidites, LNA/ENA building blocks, PMO monomers, oligonucleotide modifiers and related specialty reagents for research and development.
Pharmaceutical Intermediates
Our portfolio includes heterocyclic compounds, halogenated intermediates and specialized building blocks for pharmaceutical and fine-chemical applications.
Custom Chemistry
From route evaluation and custom synthesis to process development and scale-up support, we provide solutions tailored to specific structure, purity and volume requirements.
News
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Modified Nucleosides in Oligonucleotide Research
Oct 19, 2026
A high-level review of why researchers use sugar, base, backbone and conjugation modifications in oligonucleotide design.
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Custom Synthesis from Product Inquiry to Delivery
Oct 19, 2026
A step-by-step explanation of the information, evaluation, confirmation and communication involved in a custom synthesis project.
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How to Select a Reliable Supplier for Nucleoside Building Blocks
Oct 19, 2026
Five practical areas to review when evaluating a supplier: product identity, analytical information, batch consistency, packaging and technical communication.
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