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Oncology and immunology drugs

Cytarabine

Also known as Ara-C, Cytosine arabinoside, Aracytidine

CAS 147-94-4Formula C9H13N3O5Molar mass 243.22 g/molEC 205-705-9
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard 123 suppliers listed Drug substance
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Cytarabine chemical structure, C9H13N3O5, CAS 147-94-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Prisms from 50% ethanol
Melting point
212 to 213
Solubility
1 G IN ABOUT 5 ML WATER & 500 ML ALC, 1 G IN ABOUT 1000 ML CHLOROFORM & 300 ML METHANOL
HS code
293499
Category
Oncology and immunology drugs
Illustrative photo, a shrink wrapped pallet of kraft paper sacks in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Cytarabine?

Plain description, key identifiers and synonyms

Cytarabine is a pyrimidine nucleoside in which cytosine is attached to D-arabinofuranose via a beta-N1-glycosidic bond. Used mainly in the treatment of leukaemia, especially acute non-lymphoblastic leukaemia, cytarabine is an antimetabolite antineoplastic agent that inhibits the synthesis of DNA. It also has antiviral and immunosuppressant properties. It has a role as an antiviral agent, an antimetabolite, an antineoplastic agent and an immunosuppressive agent. It is a pyrimidine nucleoside, a beta-D-arabinoside and a monosaccharide derivative. It is functionally related to a cytosine.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-amino-1-[(2R,3S,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]pyrimidin-2-one
CAS number
147-94-4 CAS number cross-checked
EC number
205-705-9
Molecular formula
C9H13N3O5
UNII
04079A1RDZ
MDL number
MFCD00066487
InChIKey
UHDGCWIWMRVCDJ-CCXZUQQUSA-N
InChI
InChI=1S/C9H13N3O5/c10-5-1-2-12(9(16)11-5)8-7(15)6(14)4(3-13)17-8/h1-2,4,6-8,13-15H,3H2,(H2,10,11,16)/t4-,6-,7+,8-/m1/s1
Canonical SMILES
Nc1ccn(C2OC(CO)C(O)C2O)c(=O)n1
Isomeric SMILES
C1=CN(C(=O)N=C1N)[C@H]2[C@H]([C@@H]([C@H](O2)CO)O)O

Synonyms

  • Ara-C
  • Cytosine arabinoside
  • Aracytidine
  • Cytosar
  • Cytarabinoside
  • Arabinocytidine
  • Spongocytidine
  • Aracytin
  • Alexan
  • Depocyt
  • Udicil
  • Cytosar-U
  • Aracytine
  • Arabitin
  • Erpalfa
  • Cytarabina
  • Arafcyt
  • 1-beta-D-Arabinofuranosylcytosine
  • DepoCyte
  • Cytosine beta-D-arabinofuranoside
  • arabinocytosine
  • Citarabina
  • Cytarabinum
  • Arabinofuranosylcytosine
  • 4-Amino-1-beta-D-arabinofuranosyl-2(1H)-pyrimidinone
Show all 39 synonyms
  • Cytosinearabinoside
  • Arabinosylcytosine
  • beta-D-Arabinosylcytosine
  • Cytarabin
  • Cytosine arabinofuranoside
  • Cytosine beta-D-arabinoside
  • Arabinoside C
  • 1beta-D-Arabinosylcytosine
  • Cytosine 1-beta-D-arabinofuranoside
  • Cytosine-1-beta-D-arabinofuranoside
  • Cytosine arabinose
  • cytarabine liposome
  • 1beta-Arabinofuranasylcytosine
  • Beta-cytosine arabinoside

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Prisms from 50% ethanolexp.
Odour
ODORLESSexp.
Melting point
212 to 213exp.
Solubility
1 G IN ABOUT 5 ML WATER & 500 ML ALC, 1 G IN ABOUT 1000 ML CHLOROFORM & 300 ML METHANOLexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
243.22 g/molcalc.
Exact mass
243.0855 Dacalc.
LogP (octanol/water)
-2.56calc.
Topological polar surface area
130.8 Ųcalc.
Hydrogen bond donors
4calc.
Hydrogen bond acceptors
7calc.
Rotatable bonds
2calc.
Heavy atoms
17calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.56calc.
Formal charge
0calc.
Stereocentres
4calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=c1ncccn1C1CCCO1

O=c1ncccn1C1CCCO1

2 rings, 12 atoms.

1,589 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H317May cause an allergic skin reaction.
  • H340May cause genetic defects.
  • H360May damage fertility or the unborn child.
  • H361Suspected of damaging fertility or the unborn child.
Precautionary statements (11)
  • P203Obtain, read and follow all safety instructions before use.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P318If exposed or concerned, get medical advice.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Cytarabine suppliers

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All 123 suppliers
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Where suppliers are based

123 suppliers in 19 countries

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Cytarabine price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Therapeutic category: Antineoplastic, antiviral.

Veterinary medication:.

Pharmacological actions

  • Antimetabolites, Antineoplastic
  • Antiviral Agents
  • Immunosuppressive Agents

Roles

  • anti-anaemic agent
  • anti-inflammatory agent
  • anticoagulant
  • antifibrotic agent
  • antiinfective agent
  • antimalarial
  • antimetabolite
  • antimicrobial agent
  • antimicrobial drug
  • antineoplastic agent
  • antiparasitic agent
  • antiplasmodial drug
  • antiprotozoal drug
  • antiviral agent
  • hematologic agent
  • immunomodulator
  • immunosuppressive agent
  • pharmaceutical

Pharmacology

Cytarabine is a Nucleoside Metabolic Inhibitor. The mechanism of action of cytarabine is as a Nucleic Acid Synthesis Inhibitor.

How it is made

Cytidine is reacted with fuming nitric acid and resulting cytidine 2',3',5'-trinitrate is boiled in alcohol containing dilute alkali hydroxide to form inverted 2'-hydroxy compound. Remaining nitrate groups are removed via saponification.

Preparation: J. H. Hunter, US 3116282 (1963 to Upjohn)

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • Active ingredient in FDA approved drug labels

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Cytarabine is traded under.

HS 2934.99Indicative HS code

Nucleic acids and their salts, other heterocyclic compounds, not elsewhere classified in heading 2934

World exports in 2024
$26.7B
+15.0% vs 2023, imports $26.3B
2019 to 2024
Top exporters
  1. Ireland26.3%
  2. China15.7%
  3. Singapore10.3%
Top importers
  1. United States24.5%
  2. Germany23.1%
  3. Japan4.5%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Cytarabine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Cytarabine, based on the data on this page

What is Cytarabine?

Cytarabine is a pyrimidine nucleoside in which cytosine is attached to D-arabinofuranose via a beta-N1-glycosidic bond. Used mainly in the treatment of leukaemia, especially acute non-lymphoblastic leukaemia, cytarabine is an antimetabolite antineoplastic agent that inhibits the synthesis of DNA.

What is the CAS number of Cytarabine?

The CAS registry number of Cytarabine is 147-94-4.

What is the molecular formula and weight of Cytarabine?

The molecular formula of Cytarabine is C9H13N3O5 and its molar mass is 243.22 g/mol.

What is Cytarabine used for?

Therapeutic category: Antineoplastic, antiviral. Veterinary medication:.

Is Cytarabine hazardous?

Cytarabine carries the GHS signal word "Danger". Main hazards: may cause an allergic skin reaction, may cause genetic defects, may damage fertility or the unborn child. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Cytarabine?

Cytarabine is usually classified under HS code 293499 (Nucleic acids and their salts, whether or not chemically defined, other heterocyclic…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Cytarabine?

CompoundList lists 123 suppliers of Cytarabine in China, United States, India, Germany and 15 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Cytarabine in India?

15 suppliers in India list Cytarabine on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Cytarabine?

Suppliers quote Cytarabine on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Cytarabine

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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