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TPEN (Synonyms: TPEDA)

Cat. No.: HY-100202 Purity: 99.21%
Handling Instructions

TPEN is a specific cell-permeable heavy metal chelator.

For research use only. We do not sell to patients.

TPEN Chemical Structure

TPEN Chemical Structure

CAS No. : 16858-02-9

Size Price Stock Quantity
10 mM * 1 mL in DMSO USD 66 In-stock
Estimated Time of Arrival: December 31
50 mg USD 60 In-stock
Estimated Time of Arrival: December 31
100 mg USD 96 In-stock
Estimated Time of Arrival: December 31
200 mg USD 144 In-stock
Estimated Time of Arrival: December 31
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Customer Review

Based on 7 publication(s) in Google Scholar

Top Publications Citing Use of Products

    TPEN purchased from MCE. Usage Cited in: CNS Neurosci Ther. 2020 Jun 20.

    The Western blot results show that compared to the control group, the expression of cleaved MMP9 is increased by ZnCl2 treatment and decreased by 100 μM TPEN.

    TPEN purchased from MCE. Usage Cited in: CNS Neurosci Ther. 2020 Jun 20.

    The immunohistochemistry assay reveales that exposure to 100 μM TPEN significantly decreases the extent of neuronal apoptosis in the GCL of the rat retina.
    • Biological Activity

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    TPEN is a specific cell-permeable heavy metal chelator.

    In Vitro

    Heavy metal chelator TPEN attenuates fura-2 fluorescence changes induced by cadmium, mercury and methylmercury. TPEN, a cell-permeable chelator for heavy metal cations with a low affinity for Ca2+. In cells stimulated with 10 or 30 μM cadmium chloride, the addition of TPEN at 3 hr after exposure significantly decreases the elevated fura-2 fluorescence ratio to the basal levels within 10 min (119.6±2.4% or 109±1.5% decrease in ΔRatio (F340/F380) induced by 10 or 30 μM cadmium chloride, respectively), suggesting that a cadmium chloride-induced increase in the fura-2 fluorescence ratio is dependent on an increase in intracellular heavy metal cations but not intracellular Ca2+[1]. TPEN is a metal chelator, which targets colon cancer cells through redox cycling of copper. TPEN reduces cell viability in a dose- and time-dependent manner. TPEN-induced cell death is also dependent on the redox cycling of copper since the copper chelator neocuproine inhibited DNA damage and reduced pChk1, γ-H2AX, and ATM protein expression. Cell death by low TPEN concentrations, involved ATM/ATR signaling in all 3 cell lines, since pre-incubation with specific inhibitors of ATM and DNA-PK led to the recovery of cells from TPEN-induced DNA damage[2].

    Molecular Weight




    CAS No.





    Room temperature in continental US; may vary elsewhere.


    4°C, protect from light, stored under nitrogen

    *In solvent : -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen)

    Solvent & Solubility
    In Vitro: 

    DMSO : 25 mg/mL (58.89 mM; Need ultrasonic)

    Stock Solutions
    Concentration Solvent Mass 1 mg 5 mg 10 mg
    1 mM 2.3555 mL 11.7775 mL 23.5549 mL
    5 mM 0.4711 mL 2.3555 mL 4.7110 mL
    10 mM 0.2355 mL 1.1777 mL 2.3555 mL
    *Please refer to the solubility information to select the appropriate solvent.
    In Vivo:
    • 1.

      Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% saline

      Solubility: ≥ 2.08 mg/mL (4.90 mM); Clear solution

    • 2.

      Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in saline)

      Solubility: ≥ 2.08 mg/mL (4.90 mM); Clear solution

    • 3.

      Add each solvent one by one:  10% DMSO    90% corn oil

      Solubility: ≥ 2.08 mg/mL (4.90 mM); Clear solution

    *All of the co-solvents are provided by MCE.
    Cell Assay

    Human neuroblastoma cell line SH-SY5Y, are grown in Dulbecco’s Modified Eagle’s Medium (DMEM) mixed 1:1 with Ham’s F-12 nutrient mixture containing 10% fetal bovine serum, 100 unit/mL penicillin and 100 μg/mL streptomycin at 37°C in a humidified 5% CO2 atmosphere. Two days before experimentation, cells are seeded at a density of 7×104 cells/cm2 in a 96-well plate. Cells in a 96-well plate are serum-starved for 4 hr; calcium indicator fura-2 is then loaded into the cells by using Calcium kit II fura-2. In brief, SH-SY5Ycells are incubated with 5 μM fura-2/AM in the presence of 0.04% Pluronic F-127, a dispersing agent to improve the efficiency of loading with fura-2, and 1.25 mM probenecid, a blocker of organic anion transport to prevent leakage of fura-2 from cells. After 1 hr incubation at 37°C, fura-2 fluorescence is measured at 500 nm emission after excitation at 340 nm (F340) or 380 nm (F380) using an Infinite M200 plate reader at 37°C.The change in [Ca2+]i is reflected by the ratio of F340 and F380. To determine the changes in fura-2 fluorescence ratio induced by heavy metal compounds, cells are treated with manganese chloride, lead acetate, cadmium chloride , mercuric chloride and MeHg chloride dissolved in distilled water. We confirmed that the cells adhered to the bottom of the plate after 6 hr exposure to heavy metal compounds. The cells are also treated with three Ca2+ channel blockers, lanthanum chloride dissolved in distilled water, verapamil and 2-APB dissolved in DMSO, 30 min before heavy metal exposure. The heavy metal chelator TPEN is dissolved in DMSO and added 3 hr after the stimulation with heavy metals to determine the contribution of endogenous and exogenous heavy metals on fura-2 fluorescence changes. We measured the effect of TPEN (20 μM) on the fura-2 fluorescence ratio after a 10 min treatment with TPEN, since our preliminary experiments showed that the effect of TPEN on fura-2 fluorescence reached maximum and stabilized within 10 min of the treatment[1].

    MCE has not independently confirmed the accuracy of these methods. They are for reference only.


    Purity: 99.21%

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