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Key Documents

1.06076

Supelco

Methyl red (C.I. 13020)

pH indicator, ACS, Reag. Ph Eur

Sinónimos:

Methyl red (C.I. 13020), 4-Dimethylaminoazobenzene-2′-carboxylic acid

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About This Item

Fórmula empírica (notación de Hill):
C15H15N3O2
Número de CAS:
Peso molecular:
269.30
MDL number:
UNSPSC Code:
12352107
EC Index Number:
207-776-1
NACRES:
NA.05

product name

Methyl red (C.I. 13020), indicator ACS,Reag. Ph Eur

grade

ACS reagent

Quality Level

agency

reag. Ph. Eur.
suitable for SM 4500 - NH3

form

powder
solid

loss

≤5% loss on drying, 110°C

color

red to red-violet

visual transition interval

4.4-6.0, red to yellow

mp

178-182 °C

bulk density

300‑500 kg/m3

Amax

427-437 nm (buffer pH 6.2)
523-526 nm (buffer pH 4.5)

storage temp.

2-30°C

InChI

1S/C15H15N3O2/c1-18(2)12-9-7-11(8-10-12)16-17-14-6-4-3-5-13(14)15(19)20/h3-10H,1-2H3,(H,19,20)

InChI key

CEQFOVLGLXCDCX-UHFFFAOYSA-N

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Analysis Note

Identity (UV/VIS-Spectrum): passes test
Appearance: Red to red-violet powder, eventually with granular parts.
Clarity of solution (1 g/l; ethanol): passes test
Melting point (capillary method, temperatur measerment in the heating block): 179 - 182 °C
Transition range: pH 4.4 - pH 6.0 Red - yellow
Absorption maximum (buffer pH 4.5): 523 - 526 nm
Absorption maximum (buffer pH 6.2): 427 - 437 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l; buffer pH 4.5; calculated on anhydrous substance): 1350 - 1500
Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l; buffer pH 6.2; calculated on anhydrous substance): 700 - 800
Transition range (according to ACS): passes test
Loss on drying (110 °C): ≤ 5 %

Storage Class

11 - Combustible Solids

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable


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Contenido relacionado

This page is intended to make it easier to find the consumables you need based on the analytical method you’re using. Methods included on this page come from the EPA, Standard Methods and ASTM.

This page is intended to make it easier to find the consumables you need based on the analytical method you’re using. Methods included on this page come from the EPA, Standard Methods and ASTM.

This page is intended to make it easier to find the consumables you need based on the analytical method you’re using. Methods included on this page come from the EPA, Standard Methods and ASTM.

This page is intended to make it easier to find the consumables you need based on the analytical method you’re using. Methods included on this page come from the EPA, Standard Methods and ASTM.

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