Custom Synthesis
Compounds made to your specification when the catalogue cannot help — route designed, scale agreed, purity documented, confidentiality respected.
When standard products fall short
Some requirements simply are not on any supplier’s shelf: a metabolite you need as an authentic standard, an analogue for a structure–activity series, a labelled version of a known compound, or an intermediate discontinued by its original maker.
Research Chemicals China takes on those projects. We agree the target, the purity you actually need, the quantity and the timeline in advance, then run the chemistry and the analysis under the same release discipline applied to catalogue stock.
This page covers what we can make, the quality standard applied, how a project runs, and how commercial terms are set.
Synthesis capabilities
Reference Standards
High-purity authentic standards for chromatography, method validation and quantitation, characterised and certified.
Intermediates & Building Blocks
Specialised intermediates for synthetic programmes, including compounds no longer commercially available.
Analogue Series
Sets of structurally related compounds prepared to a common specification for comparative studies.
Custom Reagents
Derivatisation agents, indicators and specialty reagents for methods that standard products do not serve.
Biochemical Substrates
Modified substrates and life-science reagents prepared for specific assay formats.
Isotopically Labelled Material
Stable-isotope versions of target compounds for tracer work, metabolic studies and internal standards in mass spectrometry.
Scale-Up
Progression from a milligram proof of concept through gram quantities to kilogram batches as a programme grows.
Purification Only
Where you already hold crude material, we can take on purification and characterisation as a standalone piece of work.
Purity targets are negotiated at planning stage. Paying for 99.9% when your assay tolerates 97% is wasted budget, and we will tell you so.
How custom material is released
- Structure confirmationIdentity is established analytically before release, so what arrives is demonstrably the intended structure and not a plausible near-miss.
- Purity determinationPurity is measured and reported against the specification agreed in the project plan, with the method stated.
- Synthesis recordRoute, key steps and batch details are documented and supplied, which matters if the work later appears in a publication or filing.
- Certificate of AnalysisIssued per batch, tied to the lot you receive rather than a generic product datasheet.
- ConfidentialityProject detail is held in confidence and a non-disclosure agreement can be signed before any structure is shared.
The project workflow
Enquiry & Feasibility
Share the target structure or reference, the quantity and the purity you need. We assess whether it is practical and flag any regulatory constraint early.
Proposal
You receive a synthesis plan with the proposed route, deliverable quantity, purity target, timeline and fixed price before any work starts.
Synthesis
The route is executed with progress reported at agreed checkpoints, so a difficult step is discussed rather than discovered at the end.
Purification & Analysis
Material is purified to the agreed level and characterised. If the target purity cannot be reached, we discuss options before invoicing.
Release & Delivery
Documentation is compiled, the batch is released and the compound ships in packaging suited to its stability, cold chain where required.
Pricing, timelines and limits
| Aspect | How It Works |
|---|---|
| Quotation | Fixed price per deliverable, quoted after feasibility review. No work begins before the proposal is accepted in writing. |
| Lead Time | Set by route length and scale, stated in the proposal and updated if a checkpoint reveals a genuine obstacle. |
| Intellectual Property | Rights in a compound you specify remain yours. We claim no ownership over your target or your data. |
| Non-Returnable | Custom material is made for you alone and cannot be resold, so it falls outside our standard returns policy. Quality concerns are still investigated in full. |
| Regulatory Screening | Every enquiry is screened for controlled, restricted and dual-use status. We decline requests we cannot supply lawfully and responsibly. |
Custom synthesis is offered for legitimate research and analytical purposes. We do not accept projects intended for human or veterinary use, consumer products, or any application outside our research use policy.
Why work with us
Custom projects succeed or fail on planning and honesty, which is where we put the effort.
Analytical Rigour
No custom compound leaves us without identity confirmation and a documented purity figure against the agreed spec.
Experienced Chemists
Route design is done by people who have run the reactions, not generated from a catalogue lookup.
Confidentiality
Proprietary structures and project detail stay private, with an NDA in place before disclosure if you prefer.
Honest Feasibility
If a target is impractical or uneconomic at your scale, we say so at the enquiry stage rather than after invoicing.
Have a target in mind?
Send the structure, the quantity and the purity you need. You will get a feasibility view and a fixed-price proposal, under NDA if you prefer.