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Melphalan structure
Chemical Name:
Molecular Formula:
Formula Weight:
MOL File:

Melphalan Properties

Melting point:
~180 °C
D25 +7.5° (c = 1.33 in 1.0N HCl); D22 -31.5° (c = 0.67 in methanol)
Boiling point:
473.1±45.0 °C(Predicted)
1.3587 (rough estimate)
refractive index 
1.6070 (estimate)
storage temp. 
-20?C Freezer
95% ethanol and 1 drop 6 N HCl: 0.05 g/mL, clear
pKa 1.42/2.75/9.17(H2O,t =37.0,I=0.5) (Uncertain)
Water Solubility 
<0.1 g/100 mL at 22 ºC
CAS DataBase Reference
148-82-3(CAS DataBase Reference)
EPA Substance Registry System
Melphalan (148-82-3)
  • Risk and Safety Statements
Signal word  Danger
Hazard statements  H300+H310+H330-H350-H361
Precautionary statements  P201-P280-P302+P352+P310-P304+P340+P310-P308+P313
Hazard Codes  T+
Risk Statements  45-46-26/27/28-63-36/38-62
Safety Statements  53-22-36/37/39-45
RIDADR  UN 2811 6.1/PG 2
WGK Germany  3
RTECS  AY3675000
HazardClass  6.1(a)
PackingGroup  II
HS Code  29224999
Toxicity LD50 i.p. in rats: 14.7 mmol/kg (Ross)

Melphalan price More Price(7)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich M2011 Melphalan powder 148-82-3 100mg $157 2019-12-02 Buy
Sigma-Aldrich M2011 Melphalan powder 148-82-3 1g $831 2019-12-02 Buy
Cayman Chemical 16665 Melphalan ≥95% 148-82-3 50mg $65 2018-11-13 Buy
Cayman Chemical 16665 Melphalan ≥95% 148-82-3 100mg $117 2018-11-13 Buy
Sigma-Aldrich M2011 Melphalan powder 148-82-3 250mg $292 2019-12-02 Buy

Melphalan Chemical Properties,Uses,Production

Chemical Properties

Crystalline Solid

Chemical Properties

Melphalan forms solvated crystals from methanol.


antineoplastic, alkylating agent




ChEBI: A phenylalanine derivative comprising L-phenylalanine having [bis(2-chloroethyl)amino group at the 4-position on the phenyl ring.


Melphalan (Alkeran) is an amino acid derivative of mechlorethamine that possesses the same general spectrum of antitumor activity as do the other nitrogen mustards. However, the bioavailability of the oral preparation is quite variable (25–90%) from one patient to another.
The major indications for melphalan are in the palliative therapy of multiple myeloma and cancers of the breast or ovary. Because it does not produce alopecia, melphalan is occasionally substituted for cyclophosphamide in the CMF regimen for breast cancer.
Melphalan produces less nausea and vomiting than does cyclophosphamide; however, its bone marrow suppression tends to be more prolonged and affects both white cells and platelets. Peak suppression of blood counts occurs 14 to 21 days after a 5-day course of drug therapy; recovery is generally complete within 3 to 5 weeks.

brand name

Alkeran (GlaxoSmithKline).

General Description

White to buff-colored powder. Odorless or with a faint odor. An antineoplastic medicine.

General Description

Melphalan is available in 2-mg tablets and 50-mg vials fororal and IV administration, respectively in the treatment ofmultiple myeloma, breast and ovarian cancer, and in highdosetherapy when bone marrow transplant is being utilized.The mechanisms of resistance are the same as those seen formechlorethamine. The agent is poorly absorbed when givenby the oral route. Melphalan is highly plasma protein bound(80%–90%) and inactivated in the blood by water to givethe hydroxy metabolites. Elimination occurs primarily in thefeces with an elimination half-life of 38 to 108 minutes. Thecommonly seen adverse effects are myelosuppression, nausea,and vomiting. Nausea is normally mild with normal doses butbecomes severe when high doses are used during bone marrowtransplant. Less commonly seen adverse effects are hypersensitivityreactions, skin rash, and alopecia. Secondarycancers are also of concern with the use of the agent.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

Melphalan is a nitrogen mustard. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.


Strong irritant to eyes and mucous membranes. Confirmed carcinogen.

Fire Hazard

Flash point data are not available for Melphalan; however Melphalan is probably combustible.

Safety Profile

Confirmed human carcinogen producing leukemia and Hodgkin's disease. Poison by ingestion, intravenous, and intracerebral routes. Human systemic effects by ingestion: nausea, hypermothty, diarrhea, agranulocytosis, thrombocytopenia. Human reproductive effects by ingestion: menstrual changes. Mutation data reported. A skin irritant. Used as a poison gas. When heated to decomposition it emits toxic fumes of ClandNOx.

Potential Exposure

An alkylating agent. Healthcare workers may be exposed. As a drug it is an immunosuppressant, used in the treatment of multiple myeloma and cancer of the ovary. It is also used in investigation of other types of cancer and as an antineoplastic in animals. Human exposure to melphalan occurs principally during its use in cancer treatment. Melphalan is administered orally or intravenously. Adult dosage is 6 mg/day, 5 days per month. Has been used as a military poison gas (a nitrogen mustard, alkaline, crystals).


Melphalan is known to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in humans.


UN2811 Toxic solids, organic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required. UN3249 Medicine, solid, toxic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials

Purification Methods

Purify melphalan by recrystallisation from MeOH, and its solubility is 5% in 95% EtOH containing one drop of 6N HCl. It is soluble in EtOH and propylene glycol but is almost insoluble in H2O. The RS-form has m 180-181o, and the R-form crystallises from MeOH with m 181.5-182o and [] D21 -7.5o (c 1.26, 1.0 N HCl). [Bergel & Stock J Chem Soc 2409 1954, Beilstein 14 IV 1689.]

Waste Disposal

Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform to EPA regulations governing storage, transportation, treatment, and waste disposal. It is inappropriate and possibly dangerous to the environment to dispose of expired or waste drugs and pharmaceuticals by flushing them down the toilet or discarding them to the trash. Household quantities of expired or waste pharmaceuticals may be mixed with wet cat litter or coffee grounds, double-bagged in plastic, discard in trash. Larger quantities shall carefully take into consideration applicable DEA, EPA, and FDA regulations. If possible return the pharmaceutical to the manufacturer for proper disposal being careful to properly label and securely package the material. Alternatively, the waste pharmaceutical shall be labeled, securely packaged, and transported by a state licensed medical waste contractor to dispose by burial in a licensed hazardous or toxic waste landfill or incinerat

Melphalan Preparation Products And Raw materials

Raw materials

Preparation Products

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