Basic Fuchsin Solution/Stain

Basic Fuchsin Solution- Basic Fuchsin Stain

Basic Fuchsin Solution/Stain- Basic Fuchsin is a water-based mixture of basic fuchsine, known as rosaniline. It is a bacteriological staining agent and has a wide range of medical applications. When used as a stain, basic fuchsin produces a pink to red color with Gram-positive bacteria and a blue to purple color with Gram-negative bacteria. The Solution can be used to stain tissue samples for microscopy or to prepare slides for fluorescent microscopy. It can also be used in the preparation of cultures for microbiological studies.

Basic Fuchsin Stain
Basic Fuchsin Stain

What is Basic Fuchsin?

Basic fuchsin, also known as fuchsine, is a red dye that was once widely used in microbiology. It is prepared from aniline and rosaniline hydrochlorides. When used as a stain, basic dye stains bacteria red or magenta. However, it is no longer commonly used due to its toxicity and the fact that it does not discriminate between different types of bacteria.

It is a water-soluble red dye that is commonly used in histological staining. It is used to stain bacteria, mucins, and connective tissue. Basic dye can also be used to make a negative stain of protozoa.

How to Make Basic Fuchsin Stain

It is a kind of stain used in microscopy. It is usually used to color bacteria, but it can also be used to color other things, like tissue samples. The basic stain is made by mixing two solutions together: a solution of basic dye and a solution of potassium dichromate.

To make the basic fuchsin stain, you will need:

-Basic fuchsin dye

-Potassium dichromate

-Distilled water

-Glass slides

-Glass jars with lids

-Paper towels


Basic Fuchsin 1.000 gm

Methanol 50.000 ml

Distilled water 950.000 ml


1) First, mix together equal parts of the basic fuchsin dye and the potassium dichromate.

2) Next, add distilled water to the mixture until you have a total of 100 ml.

3) Pour the mixture into glass jars and label them clearly.

4) To use the stain, take a glass slide and place it into one of the jars.

5) Let the slide soak for at least five minutes, then remove it and blot it dry with a paper towel.

6) Repeat this process for each slide that you want to stain.

Application of Basic Fuchsin Stain

Basic Fuchsin is used in microbiology as a Gram’s stain, to identify and classify Gram-positive bacteria. It is also used as a primary staining agent in the Ziehl-Neelsen method for acid-fast bacteria. In addition, It may be used as a counterstain with other stains such as Malachite Green or Safranin. It is not very stable in solution and will gradually decompose to give an reddish brown colouration.

Safety Precautions when Using Basic Fuchsin

It is a potentially hazardous chemical and should be used with caution. When handling this chemical, always wear gloves and protective clothing. In addition, be sure to work in a well-ventilated area to avoid inhaling fumes.

If you come into contact with Basic Fuchsin, immediately wash the affected area with soap and water. If you get this chemical in your eyes, flush them with water for 15 minutes and seek medical attention.

If you accidentally ingest Basic Fuchsin, drink plenty of water and contact a poison control center or emergency room immediately.

It can be harmful if swallowed, inhaled, or absorbed through the skin. Always take precautions when using this chemical to protect yourself and others.


After reading this article, you should understand how to prepare a basic dye solution for staining purposes. This simple stain can visualize various cellular structures and is a helpful tool for any microscopist.

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