N7005

Neutral Red

Name: Neutral Red
Brand: SIAL

Dye content ≥90 %, Powder

Synonym(s):

3-Amino-7-dimethylamino-2-methylphenazine hydrochloride, Basic Red 5, Toluylene red

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About This Item

Empirical Formula (Hill Notation):

C₁₅H₁₇ClN₄

CAS Number:

553-24-2

Molecular Weight:

288.78

UNSPSC Code:

12171500

NACRES:

NA.47

PubChem Substance ID:

24897804

EC Number:

209-035-8

MDL number:

MFCD00012651

Colour Index Number:

50040

Beilstein/REAXYS Number:

3918740

Product Name

Neutral Red, Dye content ≥90 %

InChI key

PGSADBUBUOPOJS-UHFFFAOYSA-N

InChI

1S/C15H16N4.ClH/c1-9-6-13-15(8-11(9)16)18-14-7-10(19(2)3)4-5-12(14)17-13;/h4-8H,16H2,1-3H3;1H

SMILES string

Cl.CN(C)c1ccc2nc3cc(C)c(N)cc3nc2c1

form

powder

composition

Dye content, ≥90%

technique(s)

titration: suitable

color

brown to black

pH

6.8-8.0, red to yellow

mp

290 °C (dec.) (lit.)

solubility

water: 10 mg/mL, dark red

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

2-8°C

Quality Level

200

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Related Categories

Clinical & Diagnostics

Hematology Stains

Histology Stains

Tissue Diagnostics

Analysis Note

Purified

Application

Neutral red has multiple staining applications that include its use as a nuclear stain, counterstain in the Gram procedure, either alone, or as a component of the Twort stain (a fast green-neutral red mixture). Neutral red staining is also a viability assessment method used for the detection of viable yeast cells in dandruff samples and of mussel larvae. Neutral red is also recommended for use in viability assessment as it is selectively absorbed by lysosomes and other acidic organelles in cells. It is also used for supravital staining of living blood cells.

Useful as an indicator for preparing neutral red paper, and as a biological stain.

Biochem/physiol Actions

Neutral red is a widely used cationic fluorochrome that is known to accumulate in the Golgi complex and nuclei after first staining lysosomes.

General description

Neutral red (C.I. 50040) is a protonated diaminophenazine dye. It is aminodimethylaminomethylphenazinehydrochloride, C15H17N4Cl.

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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