It is an azo dye, and is a dark red crystalline powder.Methyl red is a pH indicator; it is red in pH under 4.4, yellow in pH over 6.2, and orange in between, with a pK a of 5.1. If the media includes a sufficient amount of acids, then the methyl red gives off red colour. Read More Avantor ®, a Fortune 500 company, is a leading global provider of mission-critical products and services to customers in the biopharma, healthcare, education & government, and advanced technologies & applied materials industries.Our portfolio is used in virtually every stage of the most important research, development and production activities in the industries we serve. Linear Formula: C 1 5 H 1 4 N 3 O 2 Na: Formula Weight: 291.28: Packaging: Solid: Density: 0.78g/mL: Color: Orange: Quantity: 10g: Methyl red is an acidic pH indicator, which contains p-dimethylaminoaeobenzene-O-carboxylic acid that quantifies the H + ion concentration in the media. The range of the pH of methyl red is about 4-6. They are used to visually signal the acidity or alkalinity of an aqueous (water-based) solution. Methyl red is a pH indicator; it turns pink/red at 4.4 pH & lower, yellow at 6.2 pH & higher, and orange in between. Because it changes color at the pK a of a mid strength acid, it is usually used in titration for acids. Methyl Red- Methylene Blue Indicator Solution; Methyl Red Mixed Indicator Solution: Dissolve 0.1 g of methyl red and 50 mg of methylene blue in 100 ml of ethanol (95 percent). This 30 ml bottle is a 0.02 wt% aqueous solution. Indicator pH 4.4 red to 6.2 yellow, sodium salt. : 291.28 CAS: 845-10-3 Storage Code: Red—flammable; store in approved flammable containers; store away from oxidizing materials Synonym: Acid red 2 sodium salt Methyl red (2-(N,N-dimethyl-4-aminophenyl) azobenzenecarboxylic acid), also called C.I. Methyl red will show red colour if the solution pH is at 4, whereas yellow colour will be shown if the solution pH is at 6. Methyl Red Indicator . Look below to discover the methyl red formula & more! Methyl red (pH range: 4.4–6.2) is an azo compound, the structure of which differs from methyl orange (Orange 3) one by the substitution of sulphonic acid function by … Methyl red is an indicator that change the colour of the solution if there is any pH change. pH indicators generally change color over a … Methyl orange shows red color in acidic medium and yellow color in basic medium. Formula: C 15 H 14 N 3 O 2 Na Formula Wt. Methyl Red Indicator Structure Search; Print SDS. Methyl orange is a pH indicator frequently used in titration because of its clear and distinct color variance at different pH values. Acid Red 2, is an indicator dye that turns red in acidic solutions. 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