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Trimethoprim Bacterial chemical

Name: Trimethoprim
Brand: Selleck Chemicals
SKU: S3129
Availability: InStock
Rating: 5 (3 reviews)

Cat.No.S3129

Trimethoprim (BW 56-72, NIH 204, NSC-106568) is a bacteriostatic antibiotic mainly used in the prophylaxis and treatment of urinary tract infections.

Chemical Structure

Molecular Weight: 290.32

Jump to Mechanism of Action Solubility Chemical Information, Storage & Stability Specificity

Quality Control

Batch: Purity: 99.96%

99.96

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Chemical Information, Storage & Stability

Molecular Weight	290.32	Formula	C₁₄H₁₈N₄O₃	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	738-70-5	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	BW 56-72, NIH 204, NSC-106568			Smiles	COC1=CC(=CC(=C1OC)OC)CC2=CN=C(N=C2N)N

Solubility

In vitro
Batch:

DMSO : 58 mg/mL (199.77 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Ethanol : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
=	×	×

Dilution Calculator Molecular Weight Calculator

In vivo Batch:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 40%PEG300 2 5%Tween80 3 50%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	2.900mg/ml (9.99mM)	Taking the 1 mL working solution as an example, add 50 μL of 58 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Clear solution	5% DMSO 1 95% Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.725mg/ml (2.50mM)	Taking the 1 mL working solution as an example, add 50 μL of 14.5 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

Dosage: mg/kg Average weight of animals: g Dosing volume per animal:μL Number of animals:

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO + % + % Tween 80 + % ddH₂O

%DMSO+ %

Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Mechanism of Action

In vitro	Trimethoprim acts by interfering with the action of bacterial dihydrofolate reductase, inhibiting synthesis of tetrahydrofolic acid. The Inhibition starves the bacteria of nucleotides necessary for DNA replication causing, in certain circumstances, cell lethality due to thymineless death.
References	[1] https://pubmed.ncbi.nlm.nih.gov/21741802/ [2] https://pubmed.ncbi.nlm.nih.gov/8920632/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2024-05-22)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT05817253	Completed	Clinical Audit\|Quality Improvement	University of British Columbia\|Ministry of Health British Columbia	September 23 2021	Not Applicable
NCT03424525	Active not recruiting	Bacterial Infections	University of Pennsylvania	February 1 2018	Phase 1
NCT02475876	Completed	Bacterial Infections	Michael Cohen-Wolkowiez\|Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)\|Duke University	November 2015	Phase 1

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