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Amino-acid & Peptide Building Blocks
Clarity for your next enquiry.
For peptide building blocks, confirm stereochemistry, protecting groups and the impurity profile required for the intended assembly process.
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Category sourcing guidance
Sourcing Amino-acid & Peptide Building Blocks
Life-science reagent enquiries benefit from a clear description of the intended research or manufacturing application. Define the chemical identity, analytical evidence and any application-specific acceptance criteria before assessing a candidate material.
For peptide building blocks, confirm stereochemistry, protecting groups and the impurity profile required for the intended assembly process.
Include in your enquiry
- Molecular identity, stereochemistry and any protecting groups
- Application-specific purity and analytical evidence
- Required quantity, handling documentation and packaging format
239catalogued products
7product families
Identity first. Specifications next.
CAS-led records with supply details confirmed for your enquiry.
01 / Explore the portfolio
A clear path to your material.
Choose a primary category to read its product list, ordered by secondary category.
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Try searching by product name, CAS RN, alias or category.
Ask our sourcing team →02 / Selected core products
Three materials. More clarity.
Explore three representative materials across synthesis, pharmaceutical intermediates and polymers—with detailed properties, analytical references and application context.
01Heterocyclic building block
Pyrazole
1H-Pyrazole · CAS 288-13-1
CAS RN 288-13-1M.W. 68.08 g/mol
A compact nitrogen heterocycle for organic synthesis and coordination chemistry.
GC / titration · Moisture control
Explore technical profile02Pharmaceutical intermediate
4-AA
Chiral azetidinone · CAS 76855-69-1
CAS RN 76855-69-1M.W. 287.43 g/mol
A stereochemically defined β-lactam building block used in carbapenem intermediate chemistry.
Stereochemistry · Optical rotation
Explore technical profile03Polymer monomer
FDCA
2,5-Furandicarboxylic acid · CAS 3238-40-2
CAS RN 3238-40-2M.W. 156.09 g/mol
A furan-based diacid for PEF and the development of functional polymer materials.
HPLC / titration · Polymer applications
Explore technical profile03 / Better enquiries, clearer decisions
A useful enquiry starts with the right details.
Whether you are evaluating a synthetic building block or planning an industrial purchase, a shared specification helps both teams assess the same material.
Prepare my enquirySet the quality requirements
Share your target assay, test method and limits for critical impurities, water or residual solvents. Attach your specification if available.
Plan the supply request
State the quantity, preferred packaging, destination and required delivery date. Ask for the quotation and supporting documents to be reviewed together.
04 / Sourcing questions
Before you enquire.
How do I find a chemical by CAS number?
Enter the CAS number in the catalogue search. You can also search by English or Chinese name, synonyms or molecular formula where recorded. Open the product detail page to check its identity and category before sending an enquiry.
Does a catalogue listing mean the material is in stock?
A catalogue entry identifies a material within our sourcing portfolio. Availability, price, minimum order quantity, grade and delivery schedule are confirmed for each enquiry. The catalogue does not publish live stock or a fixed commercial offer.
Can I request a COA, SDS or specification?
List the documents required by your team when submitting an enquiry. Ask for the current safety data sheet, a suitable specification and relevant analytical evidence. Document availability and the applicable batch must be confirmed for the proposed supply.
What if I cannot find my product?
Send a sourcing enquiry with the product name, CAS number and target quantity. Include the intended application and any essential quality requirements so that the team can assess your request.