1. Immunology/Inflammation
  2. Aryl Hydrocarbon Receptor
  3. FICZ

FICZ  (Synonyms: 6-Formylindolo[3,2-b]carbazole)

Cat. No.: HY-12451 Purity: 98.06%
COA Handling Instructions

FICZ is a potent aryl hydrocarbon receptor (AhR) agonist with a Kd of 70 pM.

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

FICZ Chemical Structure

FICZ Chemical Structure

CAS No. : 172922-91-7

Size Price Stock Quantity
Solid + Solvent
10 mM * 1 mL in DMSO
ready for reconstitution
USD 188 In-stock
10 mM * 1 mL in DMSO USD 188 In-stock
1 mg USD 60 In-stock
5 mg USD 120 In-stock
10 mg USD 180 In-stock
25 mg USD 350 In-stock
50 mg USD 600 In-stock
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Customer Review

Based on 14 publication(s) in Google Scholar

Top Publications Citing Use of Products
  • Biological Activity

  • Protocol

  • Purity & Documentation

  • References

  • Customer Review


FICZ is a potent aryl hydrocarbon receptor (AhR) agonist with a Kd of 70 pM.

In Vitro

FICZ (0.01 nM-1 µM) alone or in combination with 50 nM MNF induces sustained CYP1A1 activity and leads to oxidative stress and activation of apoptosis via a mitochondrial-dependent pathway. In HepG2 cells, FICZ stimulates cell growth at low concentrations but inhibits cell growth at high concentrations[1]. FICZ (10,000-30,000 nM) significantly decreases CEH viability with an estimated LC50 (95% confidence intervals) of 14,000 nM. FICZ shows concentration-dependent effects on EROD activity in CEH cultures, with the mean EC50 values at 3, 8, and 24 h of 0.016 nM, 0.80 nM, and 11 nM, respectively[2]. FICZ treatment increases transcript expression of CYP1A1 in a dose-dependent manner in both the parental iPSC line and the CYP1A1 targeted clone[3]. CYP1 inhibition in the presence of FICZ results in enhanced AHR activation, suggesting that FICZ accumulates in the cell when its metabolism is blocked. CYP1 enzymes plays a role in regulating biological effects of FICZ[4].
Nuclear export and degradation of the AHR protein are two additional steps in the AHR-mediated signal transduction pathway[5].
Exposure to AhR agonists causes AhR-expressing cells to downregulate the receptor through the ubiquitin/proteasome degradation pathway[6].

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

Molecular Weight







Light yellow to khaki




Room temperature in continental US; may vary elsewhere.

Powder -20°C 3 years
4°C 2 years
In solvent -80°C 2 years
-20°C 1 year
Solvent & Solubility
In Vitro: 

DMSO : 10 mg/mL (35.17 mM; Need ultrasonic and warming)

Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 3.5173 mL 17.5864 mL 35.1729 mL
5 mM 0.7035 mL 3.5173 mL 7.0346 mL
10 mM 0.3517 mL 1.7586 mL 3.5173 mL
*Please refer to the solubility information to select the appropriate solvent.
In Vivo:
  • 1.

    Add each solvent one by one:  15% Solutol HS 15  10% Cremophor EL  35% PEG 400   40% water

    Solubility: 3.33 mg/mL (11.71 mM); Suspended solution; Need ultrasonic

  • 2.

    Add each solvent one by one:  5% DMSO    40% PEG300    5% Tween-80    50% Saline

    Solubility: 1.11 mg/mL (3.90 mM); Suspended solution; Need ultrasonic

  • 3.

    Add each solvent one by one:  10% DMSO    90% Corn Oil

    Solubility: ≥ 0.83 mg/mL (2.92 mM); Clear solution

*All of the co-solvents are available by MedChemExpress (MCE).
Purity & Documentation

Purity: 99.42%

Cell Assay

The cell viability of CEH treated with FICZ or TCDD is studied with the untreated cells (used as a live cell control) and sodium hypochlorite (5%)-treated cells (used as a dead cell control). This assay is based upon the bioluminescent measurement of adenosine triphosphate (ATP) that is present in all metabolically active cells. Luciferase is utilized in this method to catalyze the formation of light from ATP and luciferin. CEH are lysed 24 h after dosing and the luminescence emitted from the ATP-dependent oxidation of luciferin is measured with a LuminoSkan Ascent luminometer.

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

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FICZ Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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This equation is commonly abbreviated as: C1V1 = C2V2

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