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72210

Sigma-Aldrich

Neutral Red

for microscopy (Bact., Bot., Fl., Hist., Vit.), indicator (pH 6.8-8.0)

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Synonym(s):
3-Amino-7-dimethylamino-2-methylphenazine hydrochloride, Basic Red 5, Toluylene red
Empirical Formula (Hill Notation):
C15H17ClN4
CAS Number:
Molecular Weight:
288.78
Colour Index Number:
50040
Beilstein/REAXYS Number:
3918740
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
MA.02

grade

for microscopy (Bact., Bot., Fl., Hist., Vit.)
indicator (pH 6.8-8.0)

Quality Level

form

powder or crystals

technique(s)

titration: suitable

pH

6.8-8.0, red to yellow

mp

290 °C (dec.) (lit.)

solubility

water: 0.01 g/10 mL

εmax

≥800 at 535-545 nm

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

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

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

InChI key

PGSADBUBUOPOJS-UHFFFAOYSA-N

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This Item
N7005N46381.01376
Neutral Red for microscopy (Bact., Bot., Fl., Hist., Vit.), indicator (pH 6.8-8.0)

72210

Neutral Red

Neutral Red Dye content ≥90 %

N7005

Neutral Red

Neutral Red powder, BioReagent, suitable for cell culture

N4638

Neutral Red

Neutral red (C.I. 50040) for microscopy Certistain®

1.01376

Neutral red (C.I. 50040)

grade

for microscopy (Bact., Bot., Fl., Hist., Vit.), indicator (pH 6.8-8.0)

grade

-

grade

-

grade

-

solubility

water: 0.01 g/10 mL

solubility

water: 10 mg/mL, dark red

solubility

H2O: 10 mg/mL

solubility

50 g/L

application(s)

diagnostic assay manufacturing
hematology
histology

application(s)

diagnostic assay manufacturing
hematology
histology

application(s)

diagnostic assay manufacturing

application(s)

diagnostic assay manufacturing
hematology
histology

form

powder or crystals

form

powder

form

powder

form

solid

storage temp.

room temp

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-30°C

General description

Neutral red is a vital dye widely used as a cellular pH indicator and is selective for shifts in pH. It is highly lipophilic in nature. It favours membrane potential dependent fluorescence that attributes to changes in hydrophobicity.

Application

Neutral red has been used to stain mouse mammary glands.
Useful as an indicator for preparing neutral red paper, and as a biological stain.

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)


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Biosensors & bioelectronics, 47, 184-189 (2013-04-13)
This study introduces a novel and simple method to covalently graft neutral red (NR) onto carbon surfaces based on spontaneous reduction of in situ generated NR diazonium salts. Immobilization of neutral red on carbon surface was achieved by immersing carbon
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The effects of ibuprofen (IBU) on the immune parameters of the clam Ruditapes philippinarum were investigated after a 7-day exposure to sublethal IBU concentrations (0, 0 + ethanol, 100, 500, and 1000 μg/L). Total haemocyte count (THC), haemocyte diameter and

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