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  3. Crystal Violet

Crystal Violet  (Synonyms: Basic Violet 3; Gentian Violet; Methyl Violet 10B)

Cat. No.: HY-B0324A Purity: 95.03%
COA Handling Instructions

Crystal Violet, also known as Gentian violet, methyl violet 10B, is a triphenyl-methane, an alkaline dye that binds to DNA in the nucleus of a cell, staining it a deep purple. It is often used for Gram staining to classify bacteria, or for cell or histological staining[1].

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

Crystal Violet Chemical Structure

Crystal Violet Chemical Structure

CAS No. : 548-62-9

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Customer Review

Based on 32 publication(s) in Google Scholar

Other Forms of Crystal Violet:

Top Publications Citing Use of Products

32 Publications Citing Use of MCE Crystal Violet

  • Biological Activity

  • Purity & Documentation

  • References

  • Customer Review

Description

Crystal Violet, also known as Gentian violet, methyl violet 10B, is a triphenyl-methane, an alkaline dye that binds to DNA in the nucleus of a cell, staining it a deep purple. It is often used for Gram staining to classify bacteria, or for cell or histological staining[1].

In Vitro

General Protocol

1.Preparation of MitoSOX Red working solution
Dilute the 2 g Crystal Violet in 20 mL 95% ethanol andmixed with 80 ml 1% ammonium oxalate solution solution for 24 h to obtain working solution.
2.Sample processing
2.1 Paraffin section:
First dewaxing with xylene for 5-10 min, then with fresh xylene, then dewaxing with 100% ethanol for 5 min after dewaxing for 5-10 min. Then 90% ethanol was used for 2 min. At last, 70% ethanol was used for 2 min. DDH2O 2 min.
2.2 Frozen section:
distilled water for 2 min.
2.3 Tissue culture cells:
fixed with 4% paraformaldehyde for more than 10 min. Wash with distilled water for 2 min, replace with fresh distilled water, and wash again for 2 min.
Note: Other fixatives can be selected according to specific experiments.
3.Crystal violet staining
3.1 After the sample to be tested is treated with the above method, the crystal violet dyeing solution is directly added and dyed for 10 minutes at room temperature (the dyeing solution needs to cover the sample, and the specific dyeing time can be adjusted according to the required dyeing results).
3.2 Wash well in distilled water.
3.3 Dry at room temperature.
3.4 Observe and photograph by light microscope.

Storage
4°C, 2 year
Protect from light

Precautions
1. It is recommended to take 1-2 samples for pre-test when using this product for the first time.
2. This product is for R&D use only, not for drug, household, or other uses.
3. For your safety and health, please wear a lab coat and disposable gloves to operate.

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

Clinical Trial
Molecular Weight

407.98

Formula

C25H30ClN3

CAS No.
Appearance

Solid

Color

Light green to green

SMILES

C/[N+](C)=C1C=C/C(C=C/1)=C(C2=CC=C(N(C)C)C=C2)\C3=CC=C(N(C)C)C=C3.[Cl-]

Shipping

Room temperature in continental US; may vary elsewhere.

Storage

4°C, sealed storage, away from moisture and light

*In solvent : -80°C, 1 years; -20°C, 6 months (sealed storage, away from moisture and light)

Solvent & Solubility
In Vitro: 

DMSO : ≥ 100 mg/mL (245.11 mM; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

H2O : 5 mg/mL (12.26 mM; Need ultrasonic)

*"≥" means soluble, but saturation unknown.

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.4511 mL 12.2555 mL 24.5110 mL
5 mM 0.4902 mL 2.4511 mL 4.9022 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, 1 years; -20°C, 6 months (sealed storage, away from moisture and light). When stored at -80°C, please use it within 1 years. When stored at -20°C, please use it within 6 months.

* 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 (6.13 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 (6.13 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.
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.
Please enter your animal formula composition:
%
DMSO +
+
%
Tween-80 +
%
Saline
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Calculation results:
Working solution concentration: mg/mL
Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).

*In solvent : -80°C, 1 years; -20°C, 6 months (sealed storage, away from moisture and light)

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).
Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
 If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation
Dyeing Example
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, 1 years; -20°C, 6 months (sealed storage, away from moisture and light). When stored at -80°C, please use it within 1 years. When stored at -20°C, please use it within 6 months.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
H2O / DMSO 1 mM 2.4511 mL 12.2555 mL 24.5110 mL 61.2775 mL
5 mM 0.4902 mL 2.4511 mL 4.9022 mL 12.2555 mL
10 mM 0.2451 mL 1.2256 mL 2.4511 mL 6.1278 mL
DMSO 15 mM 0.1634 mL 0.8170 mL 1.6341 mL 4.0852 mL
20 mM 0.1226 mL 0.6128 mL 1.2256 mL 3.0639 mL
25 mM 0.0980 mL 0.4902 mL 0.9804 mL 2.4511 mL
30 mM 0.0817 mL 0.4085 mL 0.8170 mL 2.0426 mL
40 mM 0.0613 mL 0.3064 mL 0.6128 mL 1.5319 mL
50 mM 0.0490 mL 0.2451 mL 0.4902 mL 1.2256 mL
60 mM 0.0409 mL 0.2043 mL 0.4085 mL 1.0213 mL
80 mM 0.0306 mL 0.1532 mL 0.3064 mL 0.7660 mL
100 mM 0.0245 mL 0.1226 mL 0.2451 mL 0.6128 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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Crystal Violet 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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