An in-stock entry refers to available physical material, subject to quantity confirmation. A virtual entry is a catalogue structure for a synthesis enquiry; it is not held in stock. Manufacturing feasibility, specifications, price and delivery time must be agreed before synthesis.
in-stock catalogue entries
Confirm quantities and documentationcatalogue entries
Synthesis and feasibility on requestWhat an in-stock catalogue tells you
HTS currently lists 62,590 in-stock catalogue entries. The material is held in Hamburg as dry powders in labelled individual vials. An online stock listing is a starting point for sourcing: ask the team to confirm the amount available and the documentation for the particular compounds you need.
A catalogue count is not a guarantee that any requested quantity can be supplied immediately. If your project needs more material than is available, specify the amount and ask what can be offered. Shipping arrangements are discussed individually, including international enquiries.
What the virtual library offers
The HTS virtual library contains 395,999 catalogue entries, with 100,608 in the HT0 series, 142,694 in HTA and 152,697 in HTC. These entries extend the chemical space you can explore, but they are not physical inventory. The search results identify virtual entries as synthesis required.
Treat a virtual structure as an opportunity to discuss manufacture. Do not assume that enumeration establishes an experimental synthesis, a confirmed yield or a guaranteed lead time. A useful enquiry states the exact structure, amount, chemical form and analytical requirements so feasibility can be assessed.
Compare the two sourcing routes
You can use the same structure and property search tools across the two libraries. Choose In stock or Not in stock · synthesis required under Availability. Select Virtual library under Catalogue when you want only virtual entries, rather than all entries requiring synthesis.
| Question | In-stock material | Virtual entry |
|---|---|---|
| Is material held? | Physical stock; confirm quantity | No; synthesis is required |
| What should I request? | Available amount and documentation | Feasibility, specifications and synthesis quotation |
| When can it arrive? | Confirm with the team | Agree after feasibility assessment |
| Can I search structures? | Yes, where a consistent structure is available | Yes, using the virtual-library filter |
Send a request that can be evaluated
HTS will discuss the scope and conditions individually. The number of entries describes the catalogue; it is not a count of unique structures or a promise that every virtual entry can be manufactured.
- Supply the HTS ID or virtual series ID, and include a structure if ambiguity is possible.
- Specify the amount per compound and whether you need a sample or a larger quantity.
- State relevant chemical-form, stereochemical and purity requirements.
- Give your desired project timing and delivery destination.
- For a large list, use bulk search and include the selected IDs in your email.
Common questions
Does virtual mean that the compound has already been made?
No. Virtual catalogue status does not establish that physical material exists or that an experimental synthesis has been completed.
Can I request a compound outside the available stock?
You can send the ID or structure and your requirements for a synthesis enquiry. The team assesses feasibility and offers terms individually.
YOUR NEXT STEP
Find chemistry to evaluate.
Explore the catalogue or send your IDs, quantities and specifications for a tailored quotation.
Catalogue information is distinct from experimental activity data. Counts refer to entries; categories can overlap. Availability, documentation and synthesis feasibility are confirmed individually. Questions or corrections? Email the team.