Building Block
& Reference Compound Catalog
1,000+ building blocks and API intermediates, searchable by structure, CAS number, or molecular formula.
Sparge Chem's catalog holds 1,000+ building blocks and API intermediates in the active catalog, built up alongside our custom synthesis and process development work rather than sourced from a third party — most catalog compounds are ones we've synthesized ourselves and characterized in-house.
The catalog is searchable by structure (exact, substructure, and similarity search), CAS number, or molecular formula through the tools on our products pages — useful for finding a specific building block, or for finding structurally similar alternatives when the exact compound you need isn't in stock.
Every catalog compound ships with a Certificate of Analysis and, where applicable, NMR and LCMS data on request. If a compound isn't in the active catalog, our custom synthesis team can typically make it — the same infrastructure and route-development expertise behind the catalog is available for one-off or scaled synthesis of compounds we don't currently stock.
What's included
1,000+ compound catalog
Building blocks and API intermediates spanning common heterocyclic scaffolds, most synthesized and characterized in-house rather than resold.
Structure, CAS, and formula search
Exact match, substructure, and similarity search by drawn structure, plus direct CAS number and molecular formula lookup.
Certificate of Analysis on every order
Purity and identity data accompany every shipment, with NMR/LCMS available on request for compounds where that data is held.
Custom synthesis for out-of-catalog compounds
If a needed compound isn't currently in stock, it can typically be custom-synthesized — see our Custom Synthesis service for scope and turnaround.
Bulk and scale-up quantities
Beyond standard catalog pack sizes, larger quantities of catalog compounds can be produced through the same scale-up infrastructure used for custom synthesis programs.
How it works
Search the catalog
Search by structure, CAS number, or molecular formula to find an exact match or structurally similar alternatives.
Request a quote
Submit an RFQ for the compound, quantity, and purity grade you need — pricing is quote-based, not publicly listed, since it depends on quantity and grade.
Not in stock? Custom synthesis
If the compound isn't currently in the catalog, our custom synthesis team assesses feasibility, typically within 24 hours.
Delivery with CoA
Compounds ship with a Certificate of Analysis; additional analytical data (NMR, LCMS) available on request.
Track record
Catalog built from in-house synthesis, not resale
Most catalog compounds originate from Sparge Chem's own custom synthesis and process development programs rather than third-party sourcing — the same team that made the compound can typically speak to its synthesis and characterization.
Common questions
How many compounds are in the catalog?
1,000+ building blocks and API intermediates, searchable by structure, CAS number, or molecular formula.
Can I search by drawing a structure?
Yes — the catalog supports exact, substructure, and similarity structure search in addition to CAS number and formula lookup.
What if the compound I need isn't in the catalog?
It can typically be custom-synthesized — our custom synthesis team gives a feasibility response within 24 hours of receiving the target structure.
Do catalog compounds come with analytical data?
Every order ships with a Certificate of Analysis; NMR and LCMS data are available on request for compounds where that data is held.
Ready to discuss building blocks?
NDA before any technical discussion. 24-hour feasibility response.