Methyl Red Free Acid ACS
Methyl red (2-(N,N-dimethyl-4-aminophenyl) azobenzenecarboxylic acid), also called C.I. Acid Red 2, is an indicator dye that turns red in acidic solutions. 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 pKa of 5.1.
Product Details
| Category |
Dyes, Stains & Indicators |
|---|---|
| Price | POA |
| CAS Number | 493-52-7 |
| Formula | C15H15N3O2 |
| Molecular Weight | 269.30 |
| Appearance | red to maroon crystalline |
| Availability | In Stock |
| Storage Conditions | Room temperature |
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