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Supelco

Neutral red (C.I. 50040)

indicator and for microbiology

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Synonym(s):
Neutral red (C.I. 50040)
Empirical Formula (Hill Notation):
C15H17ClN4
CAS Number:
Molecular Weight:
288.78
MDL number:
EC Index Number:
209-035-8

Quality Level

form

solid

composition

dye content, ≥75% spectrophotometric assay

loss

≤18% loss on drying, 110°C

pH

3.1 (20 °C, 10 g/L in H2O)

solubility

50 g/L

bulk density

350‑500 kg/m3

Amax

452-455 nm (buffer pH 8.0)
514-519 nm (buffer pH 6.8)

λmax

540-543 nm at 50% in ethanol

storage temp.

2-30°C

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
72210861251N4638
Neutral red (C.I. 50040) indicator and for microbiology

1.01369

Neutral red (C.I. 50040)

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

72210

Neutral Red

Neutral Red certified by the Biological Stain Commission

861251

Neutral Red

Neutral Red powder, BioReagent, suitable for cell culture

N4638

Neutral Red

solubility

50 g/L

solubility

water: 0.01 g/10 mL

solubility

water: 1 mg/mL

solubility

H2O: 10 mg/mL

composition

dye content, ≥75% spectrophotometric assay

composition

-

composition

Dye content, 50-60%

composition

Dye content, ≥90%

λmax

540-543 nm at 50% in ethanol

λmax

-

λmax

540 nm

λmax

-

Quality Level

200

Quality Level

100

Quality Level

100

Quality Level

200

storage temp.

2-30°C

storage temp.

room temp

storage temp.

room temp

storage temp.

2-8°C

Analysis Note

Dye content (spectrophotometrically): ≥ 75 %
Identity (UV/VIS-Spectrum): passes test
Transition range: pH 6.8 - pH 8.0 Violet red - orange yellow
Absorption maximum λmax. (ethanol 50 %): 540 - 543 nm
Absorption maximum λ 1 (buffer pH 6.8): 514 - 519 nm
Absorption maximum λ 2 (buffer pH 8.0): 452 - 455 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l; ethanol 50 %): 1180 - 1610
Spec. Absorptivity A 1%/1cm (λ1max; 0.015 g/l; buffer pH 6.8; calc. on dried substances): 425 - 575
Spec. Absorptivity A 1%/1cm (λ2max; 0.015 g/l; buffer pH 8.0; calc. on dried substances): 395 - 535
TLC-Test: passes test
Loss on drying (110 °C): ≤ 18 %
Suitability for microbiology: passes test

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable


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