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Start organic synthesis with Molport

Working on synthesis of new compounds, delivering a combinatorial chemistry project, or designing DNA Encoded Library? We offer a diverse range of in-stock building blocks in pack sizes from 50 mg to 10 kg with next-day delivery on many products.

Global Suppliers

411,963

Stock Building blocks

372,688

Made To Order Building Blocks

Know what’s available now

No more out-of-stock searches. We sync 50% of our building block inventory daily with suppliers to make sure we know exactly what’s in stock.

Purity you can rely on

Don’t compromise your project. When purity counts, 96% of our stock is 95%+ purity and sourced from fully-vetted suppliers.

Lead times that lead the way

Receive in-stock building blocks as quickly as the next day. Made-to-order lead times may take up to 30 days

Largest shop suppliers:

Fluorochem Limited
BLD Pharmatech Ltd.
MedChemExpress Europe
Chemscene
Synthonix

Aldlab
ChemDiv, Inc.
AK Scientific, Inc.
A1 BioChem Labs LLC
Apollo Scientific

Largest Chemical Classes:

Acid Chloride
Carboxylic Acid
Sulfonyl Chloride
Amine
Boronic Acid

Isocyanate
Alcohol
Aldehyde
Halogen
Azide

Find and purchase building blocks via:

Online Search Tools

By CAS numbers, Molport IDs, supplier catalog numbers, etc.

Explore online searches

FTP & API Database

Access contains price ranges, stock amount, QC method, lead time, etc.

Access database

List search

Optimize longer list- immediate price offer, segment suppliers, apply chemical filters, etc

List search

Punchout integration

Integrate with your purchasing system for faster order processing

Ordering overview