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.

53

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.
FTP & API Database
Access contains price ranges, stock amount, QC method, lead time, etc.
List search
Optimize longer list- immediate price offer, segment suppliers, apply chemical filters, etc
Punchout integration
Integrate with your purchasing system for faster order processing

We use cookies to improve your experience on our websites and for advertising. By clicking "Accept All", you consent to our use of cookies. Learn more.

On a scale of 1-5, with 5 being the highest, how would you rate your overall experience on Molport.com?