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ChemicalBook >> CAS DataBase List >> Methyl Red

Methyl Red

Methyl Red price.
  • $10 - $1332.8
  • Product name: Methyl Red
  • CAS: 493-52-7
  • MF: C15H15N3O2
  • MW: 269.3
  • EINECS:207-776-1
  • MDL Number:MFCD00002425
  • Synonyms:CI NO 13020;BROMOCRESOL GREEN/METHYL RED, MIXED INDICATOR;2-(4-Dimethylaminophenylazo)benzoic acid, 4-Dimethylaminoazobenzene-2μ-carboxylic acid, Acid Red2;METHYL RED;METHYL RED-BROMOCRESOL GREEN;2-[4-(DIMETHYLAMINO)PHENYLAZO]BENZOIC ACID;4-DIMETHYLAMINOAZOBENZENE-2'-CARBOXYLIC ACID;4-DIMETHYLAMINOAZOBENZENE-2-CARBOXYLIC ACID
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  • Manufactureraablocks
  • Product numberAA00DDNY
  • Product descriptionMethyl Red acid-baseindicatorgrade,4.5(red)-6.2(yellow)
  • Packaging25g
  • Price$14
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA00DDNY
  • Product descriptionMethyl Red acid-baseindicatorgrade,4.5(red)-6.2(yellow)
  • Packaging100g
  • Price$18
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA00DDNY
  • Product descriptionMethyl Red sodium salt
  • Packaging25g
  • Price$27
  • Updated2021-12-16
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  • Manufactureraablocks
  • Product numberAA00DDNY
  • Product descriptionMethyl Red sodium salt
  • Packaging100g
  • Price$43
  • Updated2021-12-16
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  • Manufactureraablocks
  • Product numberAA00DDNY
  • Product descriptionMethyl Red acid-baseindicatorgrade,4.5(red)-6.2(yellow)
  • Packaging500g
  • Price$56
  • Updated2026-05-28
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  • ManufacturerAK Scientific
  • Product numberZ3696
  • Product descriptionMethyl Red
  • Packaging100g
  • Price$25
  • Updated2021-12-16
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  • ManufacturerAK Scientific
  • Product numberZ3696
  • Product descriptionMethyl Red
  • Packaging25g
  • Price$10
  • Updated2021-12-16
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  • ManufacturerArctom
  • Product numberCS-0015706
  • Product descriptionMethyl red IND
  • Packaging25g
  • Price$13
  • Updated2026-05-25
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  • ManufacturerArctom
  • Product numberCS-0015706
  • Product descriptionMethyl red IND
  • Packaging25g
  • Price$13
  • Updated2026-05-26
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  • ManufacturerArctom
  • Product numberCS-0015706
  • Product descriptionMethyl red IND
  • Packaging100g
  • Price$16
  • Updated2026-05-25
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  • ManufacturerArctom
  • Product numberCS-0015706
  • Product descriptionMethyl red IND
  • Packaging100g
  • Price$16
  • Updated2026-05-26
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  • ManufacturerArctom
  • Product numberHY-Y0699
  • Product descriptionMethyl red 98.67%
  • Packaging100g
  • Price$24
  • Updated2026-05-26
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  • ManufacturerArctom
  • Product numberCS-0015706
  • Product descriptionMethyl red IND
  • Packaging500g
  • Price$52
  • Updated2026-05-25
  • Buy
  • ManufacturerArctom
  • Product numberCS-0015706
  • Product descriptionMethyl red IND
  • Packaging500g
  • Price$52
  • Updated2026-05-26
  • Buy
  • ManufacturerArctom
  • Product numberCS-0015706
  • Product descriptionMethyl red IND
  • Packaging1kg
  • Price$103
  • Updated2026-05-25
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  • ManufacturerArctom
  • Product numberCS-0015706
  • Product descriptionMethyl red IND
  • Packaging1kg
  • Price$103
  • Updated2026-05-26
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
aablocks AA00DDNY Methyl Red acid-baseindicatorgrade,4.5(red)-6.2(yellow) 25g $14 2026-05-28 Buy
aablocks AA00DDNY Methyl Red acid-baseindicatorgrade,4.5(red)-6.2(yellow) 100g $18 2026-05-28 Buy
aablocks AA00DDNY Methyl Red sodium salt 25g $27 2021-12-16 Buy
aablocks AA00DDNY Methyl Red sodium salt 100g $43 2021-12-16 Buy
aablocks AA00DDNY Methyl Red acid-baseindicatorgrade,4.5(red)-6.2(yellow) 500g $56 2026-05-28 Buy
AK Scientific Z3696 Methyl Red 100g $25 2021-12-16 Buy
AK Scientific Z3696 Methyl Red 25g $10 2021-12-16 Buy
Arctom CS-0015706 Methyl red IND 25g $13 2026-05-25 Buy
Arctom CS-0015706 Methyl red IND 25g $13 2026-05-26 Buy
Arctom CS-0015706 Methyl red IND 100g $16 2026-05-25 Buy
Arctom CS-0015706 Methyl red IND 100g $16 2026-05-26 Buy
Arctom HY-Y0699 Methyl red 98.67% 100g $24 2026-05-26 Buy
Arctom CS-0015706 Methyl red IND 500g $52 2026-05-25 Buy
Arctom CS-0015706 Methyl red IND 500g $52 2026-05-26 Buy
Arctom CS-0015706 Methyl red IND 1kg $103 2026-05-25 Buy
Arctom CS-0015706 Methyl red IND 1kg $103 2026-05-26 Buy

Properties

Melting point :179-182 °C (lit.)
Boiling point :412.44°C (rough estimate)
Density :0.839 g/mL at 25 °C
bulk density :300-500kg/m3
vapor density :9.3 (vs air)
refractive index :1.5930 (estimate)
Flash point :11 °C
storage temp. :Store at +5°C to +30°C.
solubility :ethanol: soluble1mg/mL
Colour Index :13020
form :Solid
pka :4.95(at 25℃)
color :Reddish-violet
Odor :Odorless
PH Range :4.4(red)-6.3(yellow)
Water Solubility :Practically insoluble in water. Soluble in alcohol, acetic acidSoluble in ethanol. Insoluble in water.
ε(extinction coefficient) :≥10000 at 282-288nm in methanol
≥20000 at 509-519nm in methanol
≥7000 at 329-335nm in methanol λmax :410nm, 530nm, 427nm, 519nm
Merck :14,6119
BRN :750102
Stability :Stable. Incompatible with strong oxidizing agents.
Major Application :Waveguides, LED sensors, photoresists, liquid crystals, sol-gel matrix, optical sensors, paints, toys, detection of thiols, food freshness sensors, dental product, saliva sampling method, detecting lactic acid, carbohydrates
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)
InChIKey :CEQFOVLGLXCDCX-MSUUIHNZSA-N
SMILES :N(C)(C)c1ccc(cc1)N=Nc2c(cccc2)C(=O)O
CAS DataBase Reference :493-52-7
IARC :3 (Vol. 8, Sup 7) 1987
NIST Chemistry Reference :Benzoic acid, 2-[[4-(dimethylamino)phenyl]azo]-(493-52-7)
EPA Substance Registry System :Methyl red (493-52-7)

Safety Information

Symbol(GHS): Flame (GHS02)Exclamation Mark (GHS07)Health Hazard (GHS08)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H371 May cause damage to organs Specific target organ toxicity, single exposure Category 2 Warning P260, P264, P270, P309+P311, P405,P501
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P337+P313 IF eye irritation persists: Get medical advice/attention.
P403+P235 Store in a well-ventilated place. Keep cool.

Description

pH indicator in pH range 4.2 - 6.3Methyl red is used as a pH indicator. It is red in pH less than 4.4 and yellow in pH over 6.2. It is used to study its degradation using Fenton's reagent. In microbiology, it is used to identify bacteria producing stable acids by mechanisms of mixed acid fermentation of glucose.

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