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3a,7a-Dimethylhexahydro-4,7-epoxyisobenzofuran-1,3-dione, 7a-Dimethylhexahydro-3a,4,7-epoxyisobenzofuran, Cantharidine, Hexahydro-3a,7a-dimethyl-4,7-epoxyisobenzofuran-1,3-dione
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level




215-217 °C (lit.)
215-218 °C


DMSO: soluble
ethanol: soluble

SMILES string




InChI key


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General description

Cantharidin is a poisonous vesicant, which is produced by blister bees. It is used to treat piles, ulcers, venomous worms and tuberculous scrofuloderma. It is used as an aphrodisiac, abortifacient and a veterinary medicine diuretic.


Cantharidin has been used to inhibit protein phosphatase 2 (PP2A).

Biochem/physiol Actions

Inhibitor of protein phosphatase 2A.


Bottomless glass bottle. Contents are inside inserted fused cone.


Skull and crossbones

Signal Word


Hazard Statements

Hazard Classifications

Acute Tox. 2 Oral - Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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Cécile Segonzac et al.
The EMBO journal, 33(18), 2069-2079 (2014-08-03)
Recognition of pathogen-associated molecular patterns (PAMPs) by surface-localized pattern-recognition receptors (PRRs) activates plant innate immunity, mainly through activation of numerous protein kinases. Appropriate induction of immune responses must be tightly regulated, as many of the kinases involved have an intrinsic
Timothy A Hill et al.
Bioorganic & medicinal chemistry, 15(18), 6126-6134 (2007-07-04)
A range of amines was reacted with norcantharidin (2) to provide the corresponding norcantharimides (9-43). Treatment of norcantharidin with allylamine afforded the corresponding allyl-norcantharimide (20) which was amenable to epoxidation (mCPBA, 22) and subsequent ring opening (MeOH/H(+); 23) or alternatively
Heat Oscillations Driven by the Embryonic Cell Cycle Reveal the Energetic Costs of Signaling
Rodenfels J, et al.
Developmental Cell (2019)
T I Baskin et al.
Plant physiology, 113(2), 493-502 (1997-02-01)
To investigate molecular mechanisms controlling plant morphogenesis, we examined the morphology of primary roots of Arabidopsis thaliana and the organization of cortical microtubules in response to inhibitors of serine/threonine protein phosphatases and kinases. We found that cantharidin, an inhibitor of
Hong-Chang Li et al.
Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology, 43(5), 1829-1840 (2017-10-20)
Cantharidin, a type of terpenoid secreted by the blister beetle Mylabris phalerata (Pallas), has attracted great attention in cancer therapy because of its potential anti-cancer activities. Here, we report the effects on apoptosis and autophagy in human triple-negative breast cancer


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