WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 206066

CAS#: 103766-25-2

Description: Gimeracil is a pyridine derivative with antitumor activity. Gimeracil enhances the antitumor activity of fluoropyrimidines by competitively and reversibly inhibiting the enzyme dihydropyrimidine dehydrogenase causing decreased degradation of the fluoropyrimidines. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus).

Chemical Structure

CAS# 103766-25-2

Theoretical Analysis

MedKoo Cat#: 206066
Name: Gimeracil
CAS#: 103766-25-2
Chemical Formula: C5H4ClNO2
Exact Mass: 144.99306
Molecular Weight: 145.54
Elemental Analysis: C, 41.26; H, 2.77; Cl, 24.36; N, 9.62; O, 21.99

Size Price Shipping out time Quantity
1g USD 150 2 Weeks
2g USD 250 2 Weeks
5g USD 550 2 Weeks
10g USD 950 2 Weeks
20g USD 1650 2 Weeks
Inquire bulk and customized quantity

Pricing updated 2021-02-28. Prices are subject to change without notice.

Gimeracil, purity > 98%, is in stock. Current shipping out time is about 2 weeks after order is received. CoA, QC data and MSDS documents are available in one week after order is received.

Synonym: Gimeracil; chlorodihydroxypyridine. Abbreviation: CDHP.

IUPAC/Chemical Name: 5-chloro-2-hydroxypyridin-4(1H)-one


InChi Code: InChI=1S/C5H4ClNO2/c6-3-2-7-5(9)1-4(3)8/h1-2H,(H2,7,8,9)


Solid powder

>98% (or refer to the Certificate of Analysis)

Shipping Condition:
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition:
Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Soluble in DMSO, not in water

Shelf Life:
>5 years if stored properly

Drug Formulation:
This drug may be formulated in DMSO

Stock Solution Storage:
0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code:

Handling Instructions:

Preparing Stock Solutions

The following data is based on the product molecular weight 145.54 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Select a batch to recalculate based on the batch molecular weight:
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and SDS / CoA (available online).

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1: Otsuka H, Fujii T, Toh U, Iwakuma N, Takahashi R, Mishima M, Takenaka M, Kakuma T, Tanaka M, Shirouzu K. Phase II clinical trial of metronomic chemotherapy with combined irinotecan and tegafur-gimeracil-oteracil potassium in metastatic and recurrent breast cancer. Breast Cancer. 2013 Jul 5. [Epub ahead of print] PubMed PMID: 23827973.

2: Tegafur + gimeracil + oteracil. Just another fluorouracil precursor. Prescrire Int. 2013 May;22(138):122. PubMed PMID: 23819172.

3: Meng C, Chen X, Luo Z. [Inhibitive effect of celecoxib combined with tegafur gimeracil oteracil potassium on the growth of xenograft tumor of gastric cancer in nude mice]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi. 2013 May;29(5):458-61. Chinese. PubMed PMID: 23643260.

4: Yamamoto Y, Nakai N, Wakabayashi Y, Okuzawa Y, Asai J, Takenaka H, Katoh N. A case of advanced cutaneous squamous cell carcinoma of the lower eyelid that was successfully treated with tegafur-gimeracil-oteracil potassium monotherapy. J Am Acad Dermatol. 2012 Nov;67(5):e233-4. doi: 10.1016/j.jaad.2012.04.038. PubMed PMID: 23062933.

5: Takagi M, Sakata K, Someya M, Matsumoto Y, Tauchi H, Hareyama M, Fukushima M. The combination of hyperthermia or chemotherapy with gimeracil for effective radiosensitization. Strahlenther Onkol. 2012 Mar;188(3):255-61. doi: 10.1007/s00066-011-0043-6. Epub 2012 Feb 11. PubMed PMID: 22322869.

6: Kawahara H, Watanabe K, Ushigome T, Noaki R, Kobayashi S, Yanaga K. Feasibility study of adjuvant chemotherapy with S-1 (TS-1; tegafur, gimeracil and oteracil potassium) for colorectal cancer. Hepatogastroenterology. 2012 Jan-Feb;59(113):134-7. doi: 10.5754/hge09684. PubMed PMID: 22251528.

7: Kobayakawa M, Kojima Y. Tegafur/gimeracil/oteracil (S-1) approved for the treatment of advanced gastric cancer in adults when given in combination with cisplatin: a review comparing it with other fluoropyrimidine-based therapies. Onco Targets Ther. 2011;4:193-201. doi: 10.2147/OTT.S19059. Epub 2011 Nov 15. PubMed PMID: 22162925; PubMed Central PMCID: PMC3233278.

8: Matt P, van Zwieten-Boot B, Calvo Rojas G, Ter Hofstede H, Garcia-Carbonero R, Camarero J, Abadie E, Pignatti F. The European Medicines Agency review of Tegafur/Gimeracil/Oteracil (Teysuno™) for the treatment of advanced gastric cancer when given in combination with cisplatin: summary of the Scientific Assessment of the Committee for medicinal products for human use (CHMP). Oncologist. 2011;16(10):1451-7. doi: 10.1634/theoncologist.2011-0224. Epub 2011 Sep 30. Review. PubMed PMID: 21963999; PubMed Central PMCID: PMC3228070.

9: Sakata K, Someya M, Matsumoto Y, Tauchi H, Kai M, Toyota M, Takagi M, Hareyama M, Fukushima M. Gimeracil, an inhibitor of dihydropyrimidine dehydrogenase, inhibits the early step in homologous recombination. Cancer Sci. 2011 Sep;102(9):1712-6. doi: 10.1111/j.1349-7006.2011.02004.x. Epub 2011 Jul 21. PubMed PMID: 21668582.

10: Fukushima M, Sakamoto K, Sakata M, Nakagawa F, Saito H, Sakata Y. Gimeracil, a component of S-1, may enhance the antitumor activity of X-ray irradiation in human cancer xenograft models in vivo. Oncol Rep. 2010 Nov;24(5):1307-13. PubMed PMID: 20878125.

Additional Information