| Name | URL |
|---|---|
| Alfa Aesar | http://www.alfa.com/en/gh100w.pgm |
| Aurora Fine Chemicals | http://www.aurorafinechemicals.com/index.html |
| Biosynth | http://www.biosynth.com/index.asp |
| Cayman Chemical | https://www.caymanchem.com/app/template/forensic%2CProducts.vm |
| Cerilliant | http://www.cerilliant.com/products/catalog.aspx |
| Grace Davison (Alltech) | http://www.discoverysciences.com/default.aspx |
| LGC | http://www.lgcstandards.com/epages/LGC.sf/en_GB/?ObjectPath=/shops/LGC/Categories |
| Lipomed | http://www.lipomed.com/ |
| National Measurement Institute (Australia) (Cerilliant distributes) | http://www.measurement.gov.au/Services/Pages/ChemicalReferenceMaterials.aspx |
| PerkinElmer | http://www.perkinelmer.com/home.aspx |
| Sigma Aldrich | http://www.sigmaaldrich.com/analytical-chromatography/analytical-products.html?TablePage=17719752 |
| Spectrum | http://www.spectrumchemical.com |
| Steraloids | http://steraloids.com/ |
| THC Pharm | https://biochem.thc-pharm.de/ |
| Tocris Bioscience | http://www.tocris.com/ |
| Toronto Research Chemicals | http://www.trc-canada.com/search_cat.php |
| U.S. Pharmacopeia | http://www.usp.org/referenceStandards/ |
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