Name: Levonorgestrel
Brand: Selleck Chemicals
SKU: S1727
Availability: InStock
Rating: 5 (5 reviews)

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Quality Control

Batch: Purity: 99.95%

99.95

Related Targets	Adrenergic Receptor GPR Androgen Receptor Glucocorticoid Receptor ACE RAAS Progesterone Receptor Opioid Receptor THR PGES
Other Estrogen/progestogen Receptor Inhibitors	Elacestrant (RAD1901) Dihydrochloride Vepdegestrant (ARV-471) MPP dihydrochloride Kaempferol Cholesterol PHTPP G15 Licochalcone A Endoxifen HCl Chrysin

Solubility

In vitro
Batch:

DMSO : 62 mg/mL (198.43 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 5 mg/mL

Water : 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.
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.
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.

Chemical Information, Storage & Stability

Molecular Weight	312.45	Formula	C₂₁H₂₈O₂	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	797-63-7	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	D-Norgestrel			SMILES	CCC12CCC3C(C1CCC2(C#C)O)CCC4=CC(=O)CCC34

Read more about storage stability stock solution CAS number SMILES

Mechanism of Action

Targets/IC₅₀/Ki	Progesterone receptor
In vitro	Levonorgestrel suppresses the stimulation of progesterone secretion induced by oLH, dibutyryl-cAMP and Pregnenolone in rats luteal cells. This compound also inhibits constrictions evoked by either a high potassium (K(+)) solution or phorbol myristate acetate (PMA) in the absence and presence of extracellular calcium (Ca(2+)). It depresses contractions evoked by Ca(2+) and reduces (45)Ca(2+) influx in depolarized veins. The chemical increases levels of cyclic AMP and inhibits PMA-induced activation of protein kinase C in veins. It causes endothelium-independent relaxations of jugular veins via inhibition of Ca(2+) entry and of protein kinase Cactivation. Its inhibition of both estrogen-induced pituitary weight increment and hyperprolactinemia is reduced by mifepristone, whereas Flutamide is unable to block this compound's effects
In vivo	Levonorgestrel down-regulates the mRNA expression of follicle-stimulating hormone receptor (FSHR), luteinizing hormone receptor (LHR), estrogen receptor (ER) β and progesterone receptor (PR) in the ovary, and ERα and PR in the uterus of Mongolian gerbils. This compound causes a significant upregulation of the mRNA expression of the gene encoding luteinising hormone β-subunit (lhβ) and the suppression of the mRNA expression of the gene encoding follicle-stimulating hormone β-subunit (fshβ) in the pituitary of both male and female roach. It disrupts the reproductive system of pubertalroach by affecting the pituitary gonadotropin expression and the sex steroid levels in pubertal roach (Rutilus rutilus).
References	[1] https://pubmed.ncbi.nlm.nih.gov/8049144/ [2] https://pubmed.ncbi.nlm.nih.gov/10952682/ [3] https://pubmed.ncbi.nlm.nih.gov/1854838/ [4] https://pubmed.ncbi.nlm.nih.gov/21791876/ [5] https://pubmed.ncbi.nlm.nih.gov/24893273/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2026-03-04)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT07449299	NOT_YET_RECRUITING	Emergency Contraception; Contraception; COX-2 Inhibitor	University of Utah	2027-03	PHASE3
NCT07462663	NOT_YET_RECRUITING	Endometrial Cancer; Endometrial Cancer Stage I; Atypical Endometrial Hyperplasia and Endometrial Carcinoma Stage I; Atypical Endometrial Hyperplasia; Endometrial Intraepithelial Neoplasia; Obesity & Overweight; BMI>40; Obesity; Obesity Grade III	Hospital Universitari de Bellvitge	2027-01	PHASE4
NCT07734155	NOT_YET_RECRUITING	Contraceptive Usage	Chemo Research	2026-12	PHASE3
NCT07627958	NOT_YET_RECRUITING	Vaginal Microbial Diversity	Seattle Children's Hospital	2026-07
NCT07781150	NOT_YET_RECRUITING	Obesity; Overweight; Atypical Endometrial Hyperplasia; Endometrial Carcinoma Stage I; Endometrioid Endometrial Cancer	Tongji Hospital	2026-11-01	PHASE2
NCT07536763	NOT_YET_RECRUITING	Contraception	Dr. Hang Wun Raymond Li	2026-07	PHASE3

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Levonorgestrel Estrogen/progestogen Receptor agonist

Chemical Structure

Molecular Weight: 312.45