2. Metabolic Enzyme/Protease
  3. Tyrosinase
  4. Tropolone

Tropolone is a Tropone derivative with a hydroxyl group at the 2-position, and is the precursor of many Azulene derivatives, such as 2-methylazulene-1-carboxylate. Tropolone is a potent mushroom tyrosinase inhibitor with an IC50 of 0.4 μM. Its inhibitory effect can be achieved by dialysis or excess CU 2+ Reversal.

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Tropolone Chemical Structure

Tropolone Chemical Structure

CAS No. : 533-75-5

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Description

Tropolone is a Tropone derivative with a hydroxyl group at the 2-position, and is the precursor of many Azulene derivatives, such as 2-methylazulene-1-carboxylate. Tropolone is a potent mushroom tyrosinase inhibitor with an IC50 of 0.4 μM. Its inhibitory effect can be achieved by dialysis or excess CU 2+ Reversal[1][2].

IC50 & Target

IC50: 0.4 μM (mushroom tyrosinase)[2]
Molecular Weight

122.12

Formula

C7H6O2
CAS No.
Appearance

Solid

Color

Light yellow to brown

SMILES

O=C1C(O)=CC=CC=C1
Structure Classification
Initial Source
Shipping

Room temperature in continental US; may vary elsewhere.
Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : ≥ 100 mg/mL (818.87 mM; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

H2O : 25 mg/mL (204.72 mM; Need ultrasonic)

*"≥" means soluble, but saturation unknown.

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 8.1887 mL 40.9433 mL 81.8867 mL
5 mM 1.6377 mL 8.1887 mL 16.3773 mL
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

  • Molarity Calculator

  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass
=
Concentration
×
Volume
×
Molecular Weight *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

×
Volume (start)

V1

=
Concentration (final)

C2

×
Volume (final)

V2

In Vivo:

Select the appropriate dissolution method based on your experimental animal and administration route.

For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

  • Protocol 1

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

    Solubility: ≥ 2.5 mg/mL (20.47 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

    Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
  • Protocol 2

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

    Solubility: ≥ 2.5 mg/mL (20.47 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.

    Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.

For the following dissolution methods, please prepare the working solution directly. It is recommended to prepare fresh solutions and use them promptly within a short period of time.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

  • Protocol 1

    Add each solvent one by one:  PBS

    Solubility: 20 mg/mL (163.77 mM); Clear solution; Need ultrasonic

In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

g

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Calculation results:
Working solution concentration: mg/mL
This product has good water solubility, please refer to the measured solubility data in water/PBS/Saline for details.
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only.If necessary, please contact MedChemExpress (MCE).
Purity & Documentation

Purity: 99.93%

COA (255 KB) HNMR (120 KB) RP-HPLC (277 KB)

Handling Instructions (2659 KB)
References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
H2O / DMSO 1 mM 8.1887 mL 40.9433 mL 81.8867 mL 204.7167 mL
5 mM 1.6377 mL 8.1887 mL 16.3773 mL 40.9433 mL
10 mM 0.8189 mL 4.0943 mL 8.1887 mL 20.4717 mL
15 mM 0.5459 mL 2.7296 mL 5.4591 mL 13.6478 mL
20 mM 0.4094 mL 2.0472 mL 4.0943 mL 10.2358 mL
25 mM 0.3275 mL 1.6377 mL 3.2755 mL 8.1887 mL
30 mM 0.2730 mL 1.3648 mL 2.7296 mL 6.8239 mL
40 mM 0.2047 mL 1.0236 mL 2.0472 mL 5.1179 mL
50 mM 0.1638 mL 0.8189 mL 1.6377 mL 4.0943 mL
60 mM 0.1365 mL 0.6824 mL 1.3648 mL 3.4119 mL
80 mM 0.1024 mL 0.5118 mL 1.0236 mL 2.5590 mL
100 mM 0.0819 mL 0.4094 mL 0.8189 mL 2.0472 mL

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

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Tropolone 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.

Keywords:

Tropolone533-75-5TyrosinaseTroponeDerivativeMushroomInhibitorinhibitorinhibit

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