Neutral red


Neutral red
Neutral red
Identifiers
CAS number 553-24-2 YesY
ChemSpider 10634 YesY
Jmol-3D images Image 1
Properties
Molecular formula C15H17ClN4
Molar mass 288.78 g/mol
Melting point

290°C

Boiling point

°C

 YesY (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references
Neutral red (pH indicator)
below pH 6.8 above pH 8.0
6.8 8.0

Neutral Red (or toluylene red, Basic Red 5, or C.I. 50040) is a eurhodin dye used for staining in histology. It stains lysosomes red.[1] It is used as a general stain in histology, as a counterstain in combination with other dyes, and for many staining methods. Together with Janus Green B, it is used to stain embryonal tissues and supravital staining of blood. Can be used for staining Golgi apparatus in cells and Nissl granules in neurons.

Neutral red can be used as a vital stain, to stain living cells. It is used to stain cell cultures for plate titration of viruses.

Neutral Red is added to some growth media for bacteria and cell cultures. It usually comes as a chloride salt.

Neutral Red acts as a pH indicator, changing from red to yellow between the pH 6.8-8.0.

References

  1. ^ Winckler, J. Vital staining of lysosomes and other cell organelles of the rat with neutral Red. Prog. Histochem. Cytochem. 6, 1–89 (1974).

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • neutral red — Used as an indicator (red at pH 6.8, yellow at 8.0), as a vital dye to stain granules and vacuoles in living cells, in testing the secretion of acid by the stomach (given with a test meal), and in general histologic staining. SYN …   Medical dictionary

  • neutral red — noun 1. sometimes capitalized N&R : a basic phenazine dye used chiefly as a biological stain and acid base indicator 2. : a dark red to purplish red that is lighter and stronger than plum violet or sultana and paler than wild cherry …   Useful english dictionary

  • neutral red — noun Date: 1890 a basic dye used chiefly as a biological stain and acid base indicator …   New Collegiate Dictionary

  • red — One of the primary colors, occupying the lower extremity of the spectrum at the other end from violet. For individual r. dyes, see specific name. [A.S. reád] * * * radiation experience data; rapid erythrocyte degeneration; repeat expansion… …   Medical dictionary

  • Neutral — Neu tral, a. [L. neutralis, fr. neuter. See {Neuter}.] 1. Not engaged on either side; not taking part with or assisting either of two or more contending parties; neuter; indifferent. [1913 Webster] The heart can not possibly remain neutral, but… …   The Collaborative International Dictionary of English

  • Neutral axis — Neutral Neu tral, a. [L. neutralis, fr. neuter. See {Neuter}.] 1. Not engaged on either side; not taking part with or assisting either of two or more contending parties; neuter; indifferent. [1913 Webster] The heart can not possibly remain… …   The Collaborative International Dictionary of English

  • Neutral equilibrium — Neutral Neu tral, a. [L. neutralis, fr. neuter. See {Neuter}.] 1. Not engaged on either side; not taking part with or assisting either of two or more contending parties; neuter; indifferent. [1913 Webster] The heart can not possibly remain… …   The Collaborative International Dictionary of English

  • Neutral salt — Neutral Neu tral, a. [L. neutralis, fr. neuter. See {Neuter}.] 1. Not engaged on either side; not taking part with or assisting either of two or more contending parties; neuter; indifferent. [1913 Webster] The heart can not possibly remain… …   The Collaborative International Dictionary of English

  • Neutral surface — Neutral Neu tral, a. [L. neutralis, fr. neuter. See {Neuter}.] 1. Not engaged on either side; not taking part with or assisting either of two or more contending parties; neuter; indifferent. [1913 Webster] The heart can not possibly remain… …   The Collaborative International Dictionary of English

  • Neutral tint — Neutral Neu tral, a. [L. neutralis, fr. neuter. See {Neuter}.] 1. Not engaged on either side; not taking part with or assisting either of two or more contending parties; neuter; indifferent. [1913 Webster] The heart can not possibly remain… …   The Collaborative International Dictionary of English


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.