METHYL RED INDICATOR AR

C.I.No.13020
2-(N,N-Dimethyl-4-aminophenyl)azobenzenecarboxylic acid, C.I. Acid Red 2

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Article No.
04675
Grade
AR
Purity
CAS No.
493-52-7
Molecular Formula
C15H15N3O2
Molecular Weight
269.31
H.S. Code
2927.0090
Shelf Life
60 Months
MSDS
 

 

Physical Properties

Physical state at 20 °C
Solid
Colour
Dark red powder
Odour
Odorless
Melting point/ Freezing point [°C]
179°C
Vapour density
9.3
Solubility in water [% weight]
Insoluble in water

Packings

  • 1PB1200060

    25 g (00025)

  • 1PB1200500

    100 g (00100)

  • 1000 g (01000)

 

Specifications

Appearance Dark red to maroon to violet or purple powder or crystals
Identity Passes test
pH transition range (4.4 - 6.2) Pink Red – yellow orange
Insoluble matter in ethanol (1 g/L) Passes test
Absorption maxima (buffer pH 4.5) 523 - 526 nm
Absorption maxima (buffer pH 6.2) 427 - 437 nm
Loss on drying (at 110°C) Max 5.0%
Residue on ignition (as SO4) Max 2.0%

Safety Information and Hazard Symbols

Safety Statement: 22-24/25
Revision Date : 07-May-2021
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