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250198

Sigma-Aldrich

Methyl Red

ACS reagent, crystalline

Synonym(s):

2-(4-Dimethylaminophenylazo)benzoic acid, 4-Dimethylaminoazobenzene-2′-carboxylic acid, Acid Red 2

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100 ML
₹5,808.00

About This Item

Linear Formula:
(CH3)2NC6H4N=NC6H4CO2H
CAS Number:
493-52-7
Molecular Weight:
269.30
Colour Index Number:
13020
Beilstein/REAXYS Number:
750102
EC Number:
207-776-1
MDL number:
MFCD00002425
UNSPSC Code:
12171500
PubChem Substance ID:
24855040
NACRES:
NA.47

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grade

ACS reagent

Quality Level

200

form

crystalline

technique(s)

titration: suitable

visual transition interval

4.2-6.2, pink to yellow

mp

179-182 °C (lit.)

solubility

ethanol: 1 mg/mL

λmax

410 nm

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

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Florfenicol-d3 ≥98 atom % D, ≥98% (CP)

900665

Florfenicol-d3

L-Dopa-(phenyl-d3) ≥98 atom % D, ≥98% (CP)

333786

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Ricinine-(methyl-d3) 98 atom % D, 98% (CP)

751073

Ricinine-(methyl-d3)

assay

≥90% (CP)

assay

≥98% (CP)

assay

≥98% (CP)

assay

98% (CP)

technique(s)

mass spectrometry (MS): suitable

technique(s)

mass spectrometry (MS): suitable

technique(s)

mass spectrometry (MS): suitable

technique(s)

mass spectrometry (MS): suitable

mass shift

M+3

mass shift

M+3

mass shift

M+3

mass shift

M+3

isotopic purity

≥95 atom % D

isotopic purity

≥98 atom % D

isotopic purity

≥98 atom % D

isotopic purity

98 atom % D

form

powder

form

powder

form

powder

form

powder

storage temp.

−20°C

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

−20°C

Application

Methyl Red has been used as pH indicator in a glucose biosensor, which is used for salivary analysis.[1]

Biochem/physiol Actions

Methyl Red is a maroon red crystal azo dye.[2] Methyl Red is a pH indicator and changes color at a pH of 5.5.[3] Methyl Red is widely used in saliva sampling method. In addition, it is also employed in carbohydrate and lactic acid detection.[2] Methyl Red has been effectively used for intrageneric differentiation of Enterobacteriaceae.[4]

Storage Class

11 - Combustible Solids

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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    Certificates of Analysis (COA)

    Lot/Batch Number
    MKCJ9464
    MKCJ9462
    MKCF4128
    MKBZ8656V
    MKBT4968V

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    C
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    Some metabolic inhibitors, mevastatin (MVS), chlorocholine chloride (CCC), sodium pyrophosphate (NaPP) and D,L-glyceraldehyde (DLG), were respectively added into the suspension cultures of the yew Taxus chinensis var. mairei at the late phase of cell growth to study isopentenyl pyrophosphate (IPP)
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