Chloroquine diphosphate salt

powder or crystals, 98.5-101.0% (EP)

N4-(7-Chloro-4-quinolinyl)-N1,N1-dimethyl-1,4-pentanediamine diphosphate salt, N4-(7-chloroquinolin-4-yl)-N1,N1-diethylpentane-1,4-diamine diphosphate
Empirical Formula (Hill Notation):
C18H26ClN3 · 2H3PO4
Número de CAS:
Peso molecular:
Beilstein/REAXYS Number:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level


98.5-101.0% (EP)


powder or crystals


193-198 °C
200 °C (dec.) (lit.)

Mode of action

enzyme | inhibits

antibiotic activity spectrum


SMILES string




InChI key


Gene Information

human ... ABCC1(4363)

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General description

Chloroquine is a member of quinolone family and is a weak intercalating agent. Chloroquine is used for treating amebiasis, rheumatoid arthritis, discoid and systemic lupus erythematosus.


DNA intercalator. Also used to increase transfection efficiency.
Chloroquine diphosphate salt has been used :
  • in in vitro antiplasmodial assays
  • in transfection and infection assays
  • in autophagy inhibition
  • in differentiation of induced pluripotent stem (iPS) cells into cardiomyocytes
  • in flow treatment of infected blood


25, 50, 100, 250 g in glass bottle

Biochem/physiol Actions

Standard anti-malarial drug. Substrate for MRP in multidrug resistant cell line and inhibits photoaffinity labeling of MRP by quinoline-based photoactive drug IAAQ (N-[4-[1-hydroxy-2-(dibutylamino)ethyl]quinolin-8-yl]-4-azidosalicylamide).

Features and Benefits

This compound is also offered as part of Sigma′s Library of Pharmacologically Active Compounds (LOPAC®1280), a biologically annotated collection of high-quality, ready-to-screen compounds. Click here to learn more.

Legal Information

LOPAC is a registered trademark of Sigma-Aldrich Co. LLC


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Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point F

Not applicable

Flash Point C

Not applicable

Pompe disease results in a Golgi-based glycosylation deficit in human induced pluripotent stem cell-derived cardiomyocytes
Raval KK, et al.
The Journal of Biological Chemistry, 290(5), 3121-3136 (2015)
Malaria theranostics using hemozoin-generated vapor nanobubbles
Lukianova-Hleb EY and Lapotko DO
Theranostics, 4(7), 761-761 (2014)
Mechanism of inhibition of DNA gyrase by analogues of nalidixic acid: the target of the drugs is DNA
Shen LL and Pernet AG
Proceedings of the National Academy of Sciences of the USA, 82(2), 307-311 (1985)
Ecotoxicological evaluation of the antimalarial drug chloroquine
Zurita JL, et al.
Aquatic Toxicology (Amsterdam, Netherlands), 75(2), 97-107 (2005)
E2F1 modulates p38 MAPK phosphorylation via transcriptional regulation of ASK1 and Wip1
Hershko T, et al.
The Journal of Biological Chemistry, 281(42), 31309-31316 (2006)
We presents an article on Autophagy in Cancer Promotes Therapeutic Resistance
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Protein-based drug transporters are found in most tissues including liver, kidney, intestine, and brain. These transporters are particularly important in cancer treatment and multi-drug resistance research. Understanding the specific mechanisms of tumor cell transporters is becoming an essential aspect of chemotherapeutic drug design.
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