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Open-source software for drawing and editing chemical structures.
JChemPaint (JCP) is a software tool for drawing and editing 2D chemical structures. It is an open-source software program developed by the CDK Project and is used in a variety of applications, including chemistry, biology, and pharmaceutical research. JCP includes a range of features for creating and manipulating chemical structures, including tools for drawing bonds and atoms, labeling structures, and adding text and other annotations. It also has a user-friendly interface and is available for free download for Windows, macOS, and Linux operating systems. JCP is often used in conjunction with other software tools, such as the Chemical Development Kit (CDK), a library of software tools for analyzing and manipulating chemical data.
Operating system: Windows, macOS, Linux, Unix
License: LGPL
Lab equipment markets are fragmented. Buyers spend weeks calling distributors, comparing quotes, and verifying supplier reliability. Sellers struggle to reach global research labs.
We built Questpair to fix this. Every supplier on the platform is verified before listing. Every quote you receive comes from a real, vetted seller. AI prepares your case in minutes, then a real specialist takes over.
We're an independent team based in The Netherlands, working with research labs and procurement teams across Europe and worldwide.
With a service contract, ten to fifteen years is normal for most benchtop instruments. Detectors and pumps are the parts that wear first.
Yes. Every verified supplier states which service partners cover the instrument, and we list that alongside the offer.
Ask a scientist through the request button. Parts are often available even when the instrument itself is discontinued.
Two to six weeks, depending on refurbishment scope and whether calibration is included.
We ship to 38 countries. Crating and customs handling are quoted with the instrument.
Tell us what you need and a scientist finds it for you, usually within the hour.
Last updated 19 October 2026
The middle half of the 147 with a price runs from €178 to €8,624.
