Chemical.net
- Laboratory equipment and supplies, requires registration for full use.
- http://www.chemical.net/cn_store/

Camlabs
- Chromatography supplies, general lab supplies.
- http://www.camlab.co.uk/

Crown Scientific
- An online catalogue of laboratory consumables, scientific instruments and equipment. Registration required to use fully.
- http://www.crownscientific.com.au/

Carolina Biological Supply Co.
- Provides supplies, educational resources, and lab aids to science and mathematics teachers.
- http://www.carolina.com/

Cos Lab India
- General laboratory equipment, mostly for educational uses.
- http://coslabindia.com/

Colonial Scientific
- A lab supply distributor. General laboratory supplies. Registration required for use.
- http://www.colonialscientific.com/

Cole-Parmer
- Manufacturer and distributor of laboratory equipment and supplies, tubing, pump systems, glassware, process automation and fluid handling equipment. General lab supplies.
- http://www.coleparmer.com/