MedKoo Cat#: 412579 | Name: Exametazime
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Description:

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

Exametazime is a Diagnostic Aid (Regional Cerebral Perfusion Imaging). It is a radiopharmaceutical sold under the trade name Ceretec, and is used by nuclear medicine physicians for the detection of altered regional cerebral perfusion in stroke and other cerebrovascular diseases.

Chemical Structure

Exametazime
Exametazime
CAS#105613-48-7

Theoretical Analysis

MedKoo Cat#: 412579

Name: Exametazime

CAS#: 105613-48-7

Chemical Formula: C13H28N4O2

Exact Mass: 272.2212

Molecular Weight: 272.39

Elemental Analysis: C, 57.32; H, 10.36; N, 20.57; O, 11.75

Price and Availability

Size Price Availability Quantity
100mg USD 2,450.00 2-3 months
1g USD 7,650.00 2-3 months
2g USD 12,950.00 2-3 months
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Synonym
Exametazime; Exametazima; Exametazimum; Hexametazime; DL HM-PAO; DL-HM-PAO; DL-HMPAO
IUPAC/Chemical Name
(2E,2'E,3R,3'R)-3,3'-((2,2-dimethylpropane-1,3-diyl)bis(azanediyl))bis(butan-2-one) dioxime
InChi Key
BPNZYADGDZPRTK-UDUYQYQQSA-N
InChi Code
InChI=1S/C13H28N4O2/c1-9(11(3)16-18)14-7-13(5,6)8-15-10(2)12(4)17-19/h9-10,14-15,18-19H,7-8H2,1-6H3/b16-11+,17-12+/t9-,10-/m1/s1
SMILES Code
CC(CN[C@H](C)/C(C)=N/O)(C)CN[C@H](C)/C(C)=N/O
Appearance
Solid powder
Purity
>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).
Solubility
Soluble in DMSO
Shelf Life
>3 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
2934.99.9001
More Info

Preparing Stock Solutions

The following data is based on the product molecular weight 272.39 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.

Recalculate based on batch purity %
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
1: Drugs and Lactation Database (LactMed®) [Internet]. Bethesda (MD): National Institute of Child Health and Human Development; 2006–. Technetium Tc 99m Exametazime. 2023 Oct 15. PMID: 30000634. 2: Colloby SJ, Firbank MJ, Pakrasi S, Lloyd JJ, Driver I, McKeith IG, Williams ED, O'Brien JT. A comparison of 99mTc-exametazime and 123I-FP-CIT SPECT imaging in the differential diagnosis of Alzheimer's disease and dementia with Lewy bodies. Int Psychogeriatr. 2008 Dec;20(6):1124-40. doi: 10.1017/S1041610208007709. Epub 2008 Aug 27. PMID: 18752700. 3: Hung JC, Chowdhury S, Mullan BP. Use of stabilized technetium-99m-exametazime for radiolabeling leukocytes. J Nucl Med. 1998 May;39(5):912-7. PMID: 9591600. 4: Solanki C, Wraight EP, Barber RW, Sampson CB. Seven-hour stabilization of 99Tcm-exametazime (HMPAO) for cerebral perfusion. Nucl Med Commun. 1998 Jun;19(6):567-72. doi: 10.1097/00006231-199806000-00009. PMID: 10234661. 5: Pijarowska-Kruszyna J, Karczmarczyk U, Jaroń AW, Laszuk E, Radzik M, Garnuszek P, Mikołajczak R. New synthesis route of active substance d,l-HMPAO for preparation Technetium Tc99m Exametazime. Nucl Med Rev Cent East Eur. 2017;20(2):88-94. doi: 10.5603/NMR.2017.0014. PMID: 28555448. 6: Roca M, Iglesias F, García V, Armero F, Díaz MC. Chemotaxis, viability, and labeling stability of leukocytes labeled with (99m)Tc-exametazime stabilized with methylene blue. J Nucl Med. 2001 Mar;42(3):505-8. PMID: 11337530. 7: Soundy RG, Tyrrell DA, Pickett RD, Stabin M. The radiation dosimetry of 99Tcm-exametazime. Nucl Med Commun. 1990 Nov;11(11):791-9. doi: 10.1097/00006231-199011000-00008. PMID: 2277692. 8: Hung JC, Taggart TR, Wilson ME, Owens TP. Radiochemical purity testing for 99Tcm-exametazime: a comparison study for three-paper chromatography. Nucl Med Commun. 1994 Jul;15(7):569-74. doi: 10.1097/00006231-199407000-00014. PMID: 7970436. 9: Ebmeier KP, Blackwood DH, Murray C, Souza V, Walker M, Dougall N, Moffoot AP, O'Carroll RE, Goodwin GM. Single-photon emission computed tomography with 99mTc- exametazime in unmedicated schizophrenic patients. Biol Psychiatry. 1993 Apr 1;33(7):487-95. doi: 10.1016/0006-3223(93)90002-u. PMID: 8513033. 10: Koranda P, Drymlová J, Malý T, Kantor L, Ptáček J, Mysliveček M. Tc-99m exametazime (HMPAO)-labeled leukocyte scintigraphy in premature infants: detection and localization of necrotic enterocolitis and osteomyelitis. Clin Nucl Med. 2011 Jun;36(6):e35-6. doi: 10.1097/RLU.0b013e3182173954. PMID: 21552012. 11: Hung JC, Iverson BC, Toulouse KA, Mahoney DW. Effects of methylene blue stabilizer on in vitro viability and chemotaxis of 99mTc-exametazime-labeled leukocytes. J Nucl Med. 2002 Jul;43(7):928-32. PMID: 12097465. 12: Markand ON, Spencer SS, Anderson AR. SPECT in epilepsy. J Neuroimaging. 1995 Jul;5 Suppl 1:S23-33. doi: 10.1111/jon19955s1s23. PMID: 7626834. 13: Gartshore G, Bannan P, Patterson J, Higley B, McCulloch J. Evaluation of technetium-99m exametazime stabilised with cobalt chloride as a blood flow tracer in focal cerebral ischaemia. Eur J Nucl Med. 1994 Sep;21(9):913-23. doi: 10.1007/BF00238114. PMID: 7995284. 14: Almers S, Granerus G, Franzén L, Ström M. Technetium-99m scintigraphy: more accurate assessment of ulcerative colitis with exametazime-labelled leucocytes than with antigranulocyte antibodies. Eur J Nucl Med. 1996 Mar;23(3):247-55. doi: 10.1007/BF00837622. PMID: 8599955. 15: Vanderghinste D, Van Eeckhoudt M, Terwinghe C, Mortelmans L, Bormans GM, Verbruggen AM, Vanbilloen HP. An efficient HPLC method for the analysis of isomeric purity of technetium-99m-exametazime and identity confirmation using LC-MS. J Pharm Biomed Anal. 2003 Aug 8;32(4-5):679-85. doi: 10.1016/s0731-7085(03)00175-4. PMID: 12899958. 16: Cheng KT, Spicer KM, Deshpande RV. Preparation and storage of single-dose portions of exametazime: effects on radiochemical purity after labeling. Am J Hosp Pharm. 1992 Aug;49(8):1950-4. PMID: 1332470. 17: Ballinger JR, Gulenchyn KY. Cerebral perfusion imaging. J Nucl Med. 1987 Aug;28(8):1364-5. PMID: 3039085. 18: Hung JC, Chowdhury S, Mahoney DW, Mullan BP. Radiolabelled mixed leukocytes and pure granulocytes with stabilized 99Tcm-exametazime. Nucl Med Commun. 1998 Oct;19(10):981-7. doi: 10.1097/00006231-199810000-00008. PMID: 10234678. 19: Schroeter S, Greiner-Bechert L. LeukoScan protocol. Nucl Med Commun. 2001 Jul;22(7):841. doi: 10.1097/00006231-200107000-00018. PMID: 11453060. 20: Robins PD, Salazar I, Forstrom LA, Mullan BP, Hung JC. Biodistribution and radiation dosimetry of stabilized 99mTc-exametazine-labeled leukocytes in normal subjects. J Nucl Med. 2000 May;41(5):934-40. PMID: 10809211.