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Monocrotaline (Synonyms: Crotaline)

Cat. No.: HY-N0750 Purity: >98.0%
Data Sheet SDS Handling Instructions

Monocrotaline is an pyrrolizidine alkaloid extracted from the seeds of the Crotalaria spectabilis plant to induce pulmonary hypertension in rodents.

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Monocrotaline Chemical Structure

Monocrotaline Chemical Structure

CAS No. : 315-22-0

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Free Sample (0.5-1 mg)   Apply now  
10 mM * 1 mL in DMSO $55 In-stock
50 mg $50 In-stock
100 mg $80 In-stock
200 mg $140 In-stock
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Monocrotaline is an pyrrolizidine alkaloid extracted from the seeds of the Crotalaria spectabilis plant to induce pulmonary hypertension in rodents.

In Vitro

Monocrotaline (MCT) is an 11-membered macrocyclic pyrrolizidine alkaloid (PA) derived from the seeds of the Crotalaria spectabilis plant[1]. Monocrotaline a natural ligand exhibits dose-dependent cytotoxicity with potent antineoplastic activity. The in vitro cytotoxicity of monocrotaline is proved at IC50 24.966 µg/mL and genotoxicity at 2 X IC50 against HepG2 cells[2].

In Vivo

MCT causes a pulmonary vascular syndrome in rats characterized by proliferative pulmonary vasculitis, pulmonary hypertension (PH), and cor pulmonale[3]. Among preclinical models of pulmonary arterial hypertension (PAH), monocrotaline animal model offers the advantage of mimic several key aspects of human PAH, including vascular remodeling, proliferation of smooth muscle cells, endothelial dysfunction, upregulation of inflammatory cytokines, and right ventricle failure, requiring a single drug injection[4]. Changes in multiple pathways associated with the development of PH, including activated glycolysis, increased markers of proliferation, disruptions in carnitine homeostasis, increased inflammatory and fibrosis biomarkers, and a reduction in glutathione biosynthesis are observed with the injection of monocrotaline[5].

Clinical Trial
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Preparing Stock Solutions
Concentration Volume Mass 1 mg 5 mg 10 mg
1 mM 3.0735 mL 15.3676 mL 30.7352 mL
5 mM 0.6147 mL 3.0735 mL 6.1470 mL
10 mM 0.3074 mL 1.5368 mL 3.0735 mL
Please refer to the solubility information to select the appropriate solvent.
Animal Administration

Monocrotaline is prepared in normal saline.

Rat: A total of 20 male Sprague Dawley rats (SD; 220-270g) are used in this study (n=10 per group). Control group received vehicle for monocrotaline (MCT). Pre-pulmonary hypertension (PH) group received a single injection of MCT (60 mg/kg i.p.) to induce and are sacrificed after 14 days[5]. MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Molecular Weight






Powder -20°C 3 years
  4°C 2 years
In solvent -80°C 6 months
  -20°C 1 month

Room temperature in continental US; may vary elsewhere

Solvent & Solubility

DMSO: ≥ 25 mg/mL

* "<1 mg/mL" means slightly soluble or insoluble. "≥" means soluble, but saturation unknown.

Purity: >98.0%

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