Name: Pyrimethamine
Brand: Selleck Chemicals
SKU: S2006
Availability: InStock
Rating: 5 (12 reviews)

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Quality Control

Batch: Purity: 99.01%

99.01

Related Targets	Dehydrogenase HSP Transferase P450 (e.g. CYP17) PDE phosphatase PPAR Vitamin Carbohydrate Metabolism Mitochondrial Metabolism
Other DHFR Inhibitors	Calcium Folinate Aminopterin Diaveridine

Solubility

In vitro
Batch:

DMSO : 13 mg/mL (52.26 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Ethanol : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
Mass value Mass unit	Concentration value Concentration unit	Volume value Volume unit	Molecular weight (g/mol)

Dilution Calculator Molecular Weight Calculator

In vivo batch selection 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.
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	10%DMSO 1 90%Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	1.000mg/ml (4.02mM)	Taking the 1 mL working solution as an example, add 100 μL of 10 mg/ml clear DMSO stock solution to 900 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.

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.

Chemical Information, Storage & Stability

Molecular Weight	248.71	Formula	C₁₂H₁₃ClN₄	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	58-14-0	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	RP 4753			Smiles	CCC1=C(C(=NC(=N1)N)N)C2=CC=C(C=C2)Cl

Mechanism of Action

Targets/IC₅₀/Ki	DHFR 15.4 nM
In vitro	Pyrimethamine has an IC50 of 5–13 μM for the Hex isozymes at pH 4.3. This compound increases the enzyme activity and protein level of the α and β subunits of Hex A in the βR505Q/Δ16kb cell line. This chemical-sulfadoxine is an inhibitor of dihydrofolate reductase(DHFR) that has been widely used to treat chloroquine-resistant Plasmodium falciparum malaria. It is a potent inhibitor of mouse (m)Mate1 (K(i) = 145 nM) among renal organic cation transporters mOctn1 and mOctn2 (K(i) > 30 mM), mOct1 (K(i) = 3.6 mM), and mOct2 (K(i) = 6.0 mM). This compound inhibits the uptake of metformin by kidney brush-border membrane vesicles (BBMVs) (K(i) = 41 nM) and canalicular membrane vesicles in the presence of outward gradient of H+. Its treatment significantly increases the kidney-to-plasma ratio of tetraethylammonium, and both the liver- and kidney-to-plasma ratios of metformin in mice, whereas it does not affect their plasma concentrations and urinary excretion rates. This chemical is a potent inhibitor of human (h)MATE1 and hMATE2-K (K(i) = 77 and 46 nM, respectively) and H+ and organic cation exchanger in human kidney BBMVs (K(i) = 31 nM) in the presence of outward gradient of H+.
References	[1] https://pubmed.ncbi.nlm.nih.gov/17237499/ [2] https://pubmed.ncbi.nlm.nih.gov/12204514/ [3] https://pubmed.ncbi.nlm.nih.gov/20065018/

Clinical Trial Information

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

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT05678348	Recruiting	Head and Neck Cancer\|Cancer of the Head and Neck	Washington University School of Medicine\|Tilde Sciences	August 3 2023	Early Phase 1
NCT06162078	Recruiting	Maternal Malaria During Pregnancy - Baby Not Yet Delivered	Groupe de Recherche Action en Sante\|European Vaccine Initiative	August 25 2023	--
NCT05979896	Recruiting	Malaria	Malaria Consortium	July 28 2023	Phase 4
NCT05478954	Active not recruiting	Malaria	Malaria Consortium	July 15 2022	Phase 4
NCT05471544	Active not recruiting	Malaria	Malaria Consortium	July 18 2022	Phase 3

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Pyrimethamine DHFR inhibitor

Chemical Structure

Molecular Weight: 248.71