MilliporeSigma
All Photos(2)

Documents

1.06076

Supelco

Methyl red (C.I. 13020)

indicator ACS,Reag. Ph Eur

Sign Into View Organizational & Contract Pricing

Synonym(s):
Methyl red (C.I. 13020), 4-Dimethylaminoazobenzene-2′-carboxylic acid
Empirical Formula (Hill Notation):
C15H15N3O2
CAS Number:
Molecular Weight:
269.30
MDL number:
EC Index Number:
207-776-1

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

Looking for similar products? Visit Product Comparison Guide

Related Categories

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

This Item
2501981.060781.01322
Methyl red (C.I. 13020) indicator ACS,Reag. Ph Eur

Supelco

1.06076

Methyl red (C.I. 13020)

Methyl Red ACS reagent, crystalline

Sigma-Aldrich

250198

Methyl Red

Methyl orange (C.I. 13025) indicator ACS,Reag. Ph Eur

Supelco

1.01322

Methyl orange (C.I. 13025)

form

powder, solid

form

crystalline

form

solid

form

solid

color

red to red-violet

color

-

color

-

color

-

mp

178-182 °C

mp

179-182 °C (lit.)

mp

-

mp

>300 °C

storage temp.

2-30°C

storage temp.

room temp

storage temp.

2-30°C

storage temp.

2-30°C

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

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 Code

11 - Combustible Solids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Customers Also Viewed

Slide 1 of 9

1 of 9

Thymol blue indicator ACS, Reag. Ph Eur

Supelco

1.08176

Thymol blue

Sodium acetate trihydrate for analysis EMSURE® ACS,ISO,Reag. Ph Eur

Supelco

1.06267

Sodium acetate trihydrate

Methyl Orange ACS reagent, Dye content 85 %

Sigma-Aldrich

114510

Methyl Orange

Phenolphthalein indicator ACS,Reag. Ph Eur

Supelco

1.07233

Phenolphthalein

Bromocresol Green ACS reagent, Dye content 95 %

Sigma-Aldrich

114359

Bromocresol Green

Methyl Orange for microscopy (Hist.), indicator (pH 3.0-4.4)

Sigma-Aldrich

68250

Methyl Orange

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service