Cefepime Dihydrochloride Monohydrate

Name: Cefepime Dihydrochloride Monohydrate
Brand: MedChemExpress
SKU: HY-B0616
Rating: 5.0 (18 reviews)

Cat. No.: HY-B0616 Purity: 99.89%: Data Sheet
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Cefepime (BMY-28142) Dihydrochloride Monohydrate is a broad-spectrum, blood-brain barrier-permeable cephalosporin antibiotic with hPON1 inhibitory activity, with an IC₅₀ of 21.115 mM and a K_i of 35.092 mM. Cefepime Dihydrochloride Monohydrate inhibits hPON1 via a non-competitive mechanism and blocks GABA_A receptors. Cefepime Dihydrochloride Monohydrate penetrates the outer membrane of Gram-negative bacteria, inhibits the growth of Gram-positive and Gram-negative bacteria, and does not induce the production of β-lactamase.

For research use only. We do not sell to patients.

CAS No. : 123171-59-5

Size	Stock	Quantity
500 mg	In-stock	Estimated Time of Arrival: December 31
1 g	In-stock	Estimated Time of Arrival: December 31
5 g	In-stock	Estimated Time of Arrival: December 31
10 g	Get quote
50 g	Get quote

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Customer Review

Based on 18 publication(s) in Google Scholar

Other Forms of Cefepime Dihydrochloride Monohydrate:

Cefepime In-stock
Cefepime Dihydrochloride Monohydrate (Standard) In-stock

18 Publications Citing Use of MCE Cefepime Dihydrochloride Monohydrate

Microbiological Assay

: Cefepime Dihydrochloride Monohydrate purchased from MedChemExpress. Usage Cited in: J Antimicrob Chemother. 2026 Feb 2;81(3):dkag034. [Abstract]; Activities of new β-lactam/β-lactamase inhibitors (Cefepime, et al.) against AmpC-hyperproducing E. cloacae complex and Klebsiella aerogenes were evaluated.

: Cefepime Dihydrochloride Monohydrate purchased from MedChemExpress. Usage Cited in: Infect Genet Evol. 2025 Sep:133:105780. [Abstract]; Antibiotic sensitivity of K. pneumoniae Kp81 and its derivatives.

: Cefepime Dihydrochloride Monohydrate purchased from MedChemExpress. Usage Cited in: Vet Microbiol. 2024 May:292:110046.; MICs for 16 antimicrobial agents against 381 strains of P. multocida from pigs.
^a AMP: ampicillin, AMX: amoxicillin, CEF: ceftiofur, CIP: ciprofloxacin, COL: colistin, CPM: Cefepime, DOX: doxycycline, ENR: enrofloxacin, ERY: erythromycin, FFC: florfenicol, GEN: gentamicin, IPM: imipenem, SPT: spectinomycin, TET: tetracycline, TGC: tigecycline, TIL: tilmicosin.
^b NA: breakpoint not available.
^c veterinary-specific breakpoints applicable to porcine P. multocida from CLSI VET01S ED7:2024; light grey shading – susceptible, dark grey shading – intermediate, black shading – resistant.

: Cefepime Dihydrochloride Monohydrate purchased from MedChemExpress. Usage Cited in: J Antibiot (Tokyo). 2023 Apr;76(4):225-235. [Abstract]; Susceptibility patterns of E. coli isolates (n = 140) towards different β-Lactams singly and in combination with β-Lactamase inhibitors (CFP Cefoperazone, CAZ Ceftazidime, FEP Cefepime). The results showed that cephalosporins were effective against E. coli isolates at the following rates: cefoperazone (52.9%), ceftazidime (43.5%), and Cefepime (32.1%).

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Biological Activity
Purity & Documentation
References
Customer Review

Description

IC₅₀ & Target

β-lactam

In Vitro

Cefepime (18 h) Dihydrochloride Monohydrate potently inhibits most isolates of Gram-negative aerobic bacteria. Among these pathogens, the MIC₉₀ value is ≤1 mg/L for most Enterobacteriaceae, 16 mg/L for Pseudomonas aeruginosa, and ≤0.12 mg/L for Haemophilus influenzae, Neisseria gonorrhoeae and Branhamella catarrhalis^[4].
Cefepime (18-48 h) Dihydrochloride Monohydrate inhibits Gram-positive bacterial isolates, with an MIC₉₀ value of ≤ 4 mg/L against staphylococci and an MIC₉₀ value of ≤ 0.25 mg/L against most streptococci, but shows limited activity against Enterococcus faecalis, Listeria monocytogenes and Bacteroides species^[4].
Cefepime Dihydrochloride Monohydrate exhibits stable in vitro activity across different culture media, pH values, and inoculum sizes. For most isolates, the difference between its MIC and MBC values is extremely small, but the MBC values of Pseudomonas aeruginosa and Staphylococcus aureus in human serum are higher^[4].
Cefepime (2-8×MIC; 2-24 h) Dihydrochloride Monohydrate exhibits concentration-dependent bactericidal activity against Enterobacter cloacae (with the strongest activity and no regrowth observed at 8×MIC), sustained bactericidal activity against Pseudomonas aeruginosa, but only limited transient activity against Methicillin (HY-121544)-resistant Staphylococcus aureus^[4].
Cefepime (1 mM) Dihydrochloride Monohydrate exhibits high stability against almost all tested plasmid-mediated and chromosome-mediated bacterial β-lactamases, and is only slightly hydrolyzed by the PSE-2 enzyme^[4].
Cefepime Dihydrochloride Monohydrate is a weak inhibitor of most bacterial β-lactamases, exhibiting only weak activity against Proteus vulgaris Ic enzyme and Pseudomonas aeruginosa Id enzyme, with an IC₅₀ value of > 400 mg/L against the key clinical β-lactamases TEM-1 and P99^[4].
Cefepime Dihydrochloride Monohydrate exhibited only marginal differences in MIC values among Escherichia colipermeability mutants, whereas an 8-fold difference was observed among Pseudomonas aeruginosapermeability mutants, indicating that its ability to enhance bacterial cell wall penetration is limited^[4].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

In Vivo

Cefepime Dihydrochloride Monohydrate induces bacterial stasis in a neutropenic murine thigh infection model infected with Enterobacteriaceae and Klebsiella pneumoniae, under the condition that the unbound drug concentration remains above the MIC for 0-37.7% of the dosing interval^[2].
Cefepime (250-500 mg/kg; intravenous bolus) Dihydrochloride Monohydrate does not increase the susceptibility to pentylenetetrazol (PTZ)-induced convulsions in normal male ICR mice^[3].
Cefepime (250-500 mg/kg; intravenous bolus) Dihydrochloride Monohydrate significantly increases the average seizure grade to 3.3 in the low-current electroshock-induced seizure model of normal male ICR mice, while the 250 mg/kg dose increases the average seizure grade to 2.0^[3].
Cefepime (500 mg/kg; intravenous bolus) Dihydrochloride Monohydrate induces convulsions in 2 out of 3 normal male ICR mice, and elicits electroencephalogram spike waves in the parietal cortex of 1 mouse following low-current electroshock stimulation^[3].
Cefepime (500 mg/kg; intravenous bolus) Dihydrochloride Monohydrate significantly increases the average seizure grade induced by low-current electroconvulsive shock to 4.0 in cornea-kindled male ICR mice^[3].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Molecular Weight

571.50

Formula

C₁₉H₂₈Cl₂N₆O₆S₂

CAS No.

123171-59-5

Appearance

Solid

Color

White to light yellow

SMILES

C[N+]1(CC(CS[C@]2([H])[C@@H]3NC(/C(C4=CSC(N)=N4)=N\OC)=O)=C(C(O)=O)N2C3=O)CCCC1.[Cl-].Cl.O

Shipping

Room temperature in continental US; may vary elsewhere.

Storage

4°C, sealed storage, away from moisture and light

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light)

Solvent & Solubility

In Vitro:

H₂O : 10 mg/mL (17.50 mM; Need ultrasonic)

DMSO : 6 mg/mL (10.50 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions

Concentration Solvent Mass	1 mg	5 mg	10 mg

1 mM	1.7498 mL	8.7489 mL	17.4978 mL
5 mM	0.3500 mL	1.7498 mL	3.4996 mL
10 mM	0.1750 mL	0.8749 mL	1.7498 mL

View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

Molarity Calculator
Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Concentration _(start) × Volume _(start) = Concentration _(final) × Volume _(final)

This equation is commonly abbreviated as: C₁V₁ = C₂V₂

Concentration _(start)

Volume _(start)

Concentration _(final)

Volume _(final)

In Vivo:

Select the appropriate dissolution method based on your experimental animal and administration route.

For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

Protocol 1

Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 2.08 mg/mL (3.64 mM); Clear solution

This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.
Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
Protocol 2

Add each solvent one by one: 10% DMSO 90% (20% SBE-β-CD in Saline)
Solubility: 2.08 mg/mL (3.64 mM); Suspended solution; Need ultrasonic

This protocol yields a suspended solution of 2.08 mg/mL. Suspended solution can be used for oral and intraperitoneal injection.
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
Protocol 3

Add each solvent one by one: 10% DMSO 90% Corn Oil
Solubility: ≥ 2.08 mg/mL (3.64 mM); Clear solution

This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 mg/mL) to 900 μL Corn oil, and mix evenly.

For the following dissolution methods, please prepare the working solution directly. It is recommended to prepare fresh solutions and use them promptly within a short period of time.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

Protocol 1

Add each solvent one by one: PBS
Solubility: 7.14 mg/mL (12.49 mM); Clear solution; Need ultrasonic

In Vivo Dissolution Calculator

Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.

Please enter your animal formula composition:

DMSO +

Tween-80 +

Saline

Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.

The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).

Calculation results:

Working solution concentration: mg/mL

Method for preparing stock solution: mg drug dissolved in μL DMSO (Stock solution concentration: mg/mL).

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light)

The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).

Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.

If the continuous dosing period exceeds half a month, please choose this protocol carefully.

Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.

Purity & Documentation

Purity: 99.91%

Select Batch:

Data Sheet (286 KB) SDS (394 KB)

COA (258 KB) HNMR (207 KB) LCMS (114 KB)

Handling Instructions (2659 KB)

References

[1]. Türkeş C, et al. Human serum paraoxonase-1 (hPON1): in vitro inhibition effects of moxifloxacin hydrochloride, levofloxacin hemihidrate, cefepime hydrochloride, cefotaxime sodium and ceftizoxime sodium. J Enzyme Inhib Med Chem. 2015;30(4):622-628. [Content Brief]

[2]. Pais GM, et al. Clinical Pharmacokinetics and Pharmacodynamics of Cefepime. Clin Pharmacokinet. 2022;61(7):929-953. [Content Brief]

[3]. Tanaka A, et al. Convulsive liability of cefepime and meropenem in normal and corneal kindled mice. Antimicrob Agents Chemother. 2014;58(8):4380-4383. [Content Brief]

[4]. Neu HC, et al. The activity of BMY 28142 a new broad spectrum beta-lactamase stable cephalosporin. J Antimicrob Chemother. 1986;17(4):441-452. [Content Brief]

Complete Stock Solution Preparation Table

Optional Solvent	Concentration Solvent Mass	1 mg	5 mg	10 mg	25 mg

DMSO / H₂O	1 mM	1.7498 mL	8.7489 mL	17.4978 mL	43.7445 mL
	5 mM	0.3500 mL	1.7498 mL	3.4996 mL	8.7489 mL
	10 mM	0.1750 mL	0.8749 mL	1.7498 mL	4.3745 mL
H₂O	15 mM	0.1167 mL	0.5833 mL	1.1665 mL	2.9163 mL

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.