Name: Cyclophosphamide
Brand: Selleck Chemicals
SKU: S1217
Availability: InStock
Rating: 5 (15 reviews)

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Quality Control

Batch: Purity: 99.04%

99.04

Related Targets	HDAC PARP ATM/ATR DNA-PK WRN Topoisomerase PPAR Sirtuin Casein Kinase eIF
Other DNA/RNA Synthesis Inhibitors	CX-5461 (Pidnarulex) SCR7 Favipiravir (T-705) RK-33 EED226 BMH-21 Carmofur Triapine (3-AP) YK-4-279 Halofuginone

Solubility

In vitro
Batch:

DMSO : 52 mg/mL (199.16 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : 52 mg/mL

Ethanol : 52 mg/mL

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.
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.	2.600mg/ml (9.96mM)	Taking the 1 mL working solution as an example, add 50 μL of 52 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.	0.650mg/ml (2.49mM)	Taking the 1 mL working solution as an example, add 50 μL of 13 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.

Chemical Information, Storage & Stability

Molecular Weight	261.09	Formula	C₇H₁₅Cl₂N₂O₂P	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	50-18-0	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	NSC 26271,Endoxan, Cytoxan, Neosar, Procytox, Revimmune, Cytophosphane			SMILES	ClCCN(CCCl)[P]1(=O)NCCCO1

Read more about storage stability stock solution CAS number SMILES

Mechanism of Action

Targets/IC₅₀/Ki	DNA replication
In vivo	Cyclophosphamide is an alkylating agent with cytotoxic and immunosuppressive activities. This compound requires enzymatic and chemical activation to release active phosphoramide mustard which produces the interstrand and intrastrand DNA crosslinks at guanine N-7 positions. It exerts its cytotoxic activity by inhibiting nuclear DNA replication. The mechanism of this compound-induced immunosuppression is possibly due to direct cytotoxic effect of the drug on immunocompetent lymphocytes, particulafly those that have undergone antigenic differentiation and division. This chemical has its greatest effect on B cells with relative T cell-sparing effect. Trials in various tumor-bearing animals confirmed this in vivo activity and demonstrated fairly potent antitumor effect. This agent, in combination with other antineoplastic agents, is used for the treatment of various cancers, including breast, lymphoid and pediatric malignancies.
References	[1] https://pubmed.ncbi.nlm.nih.gov/6392368/ [2] https://pubmed.ncbi.nlm.nih.gov/19786984/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2026-07-22)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT04877613	ACTIVE_NOT_RECRUITING	Metastatic Medullary Thyroid Cancer; Recurrent Thyroid Gland Medullary Carcinoma	University of Pennsylvania	2021-08-19	PHASE1
NCT03935893	ACTIVE_NOT_RECRUITING	Gastric Cancer; Colorectal Cancer; Pancreatic Cancer; Sarcoma; Mesothelioma; Neuroendocrine Tumors; Squamous Cell Cancer; Merkel Cell Carcinoma; Mismatch Repair Deficiency; Microsatellite Instability	Udai Kammula	2019-12-03	PHASE2
NCT07220187	NOT_YET_RECRUITING	Richter Syndrome; Transformed Chronic Lymphocytic Leukemia to Diffuse Large B-Cell Lymphoma; Transformed Small Lymphocytic Lymphoma to Diffuse Large B-Cell Lymphoma	SWOG Cancer Research Network	2026-08-31	PHASE3
NCT05463133	RECRUITING	Chronic Granulomatous Disease	National Institute of Allergy and Infectious Diseases (NIAID)	2022-07-08	PHASE1; PHASE2
NCT05508009	RECRUITING	SIOD; Cystinosis; FSGS; SLE Nephritis; CKD Stage 4	Alice Bertaina	2023-01-10	PHASE1; PHASE2
NCT06205290	WITHDRAWN	Leukemia, Lymphocytic, Chronic, B-Cell	Juno Therapeutics, Inc., a Bristol-Myers Squibb Company	2024-01-16	PHASE3

Tech Support

Handling Instructions

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Frequently Asked Questions

Question 1:
Why does it show no activity in in vitro assays in S1217?

Answer:
The activity of this product in vitro is controversial and has not been fully determined. It is a prodrug and may need Cytochrome P450 to convert it to the active form: 4-hydroxy cyclophosphamide. This compound is widely used in vivo, if you are going to use it in vitro, you may need to supplement Cytochrome P450 exogenously.

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Cyclophosphamide Alkylating Agent

Chemical Structure

Molecular Weight: 261.09