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| | Methyl Red sodium salt Basic information |
| Product Name: | Methyl Red sodium salt | | Synonyms: | S NO 250;MR;P-DIMETHYLAMINOAZOBENZENE-O-CARBOXYLIC ACID;O-(P-DIMETHYLAMINOPHENYLAZO)BENZOIC ACID;O-[[P-(DIMETHYLAMINO)PHENYL]AZO]BENZOIC ACID, SODIUM SALT;Methyl Red, sodium salt, 0.2% w/v Aqueous Solution;Methyl Red, Sodium Salt, Reagent;2-[4-(Dimethylamino)phenylazo]benzoic acid sodium salt, 4-Dimethylaminoazobenzene-2μ-carboxylic acid sodium salt | | CAS: | 845-10-3 | | MF: | C15H16N3NaO2 | | MW: | 293.3 | | EINECS: | 212-682-9 | | Product Categories: | Azo;Analytical Chemistry;Organics;Indicator (pH);pH Indicators | | Mol File: | 845-10-3.mol |  |
| | Methyl Red sodium salt Chemical Properties |
| Melting point | 178-182 °C | | Boiling point | 64.7 °C | | density | 0.791 | | Fp | 12 °C | | storage temp. | Store at +5°C to +30°C. | | solubility | H2O: soluble | | form | Solid | | pka | 2.3, 5.0(at 25℃) | | Colour Index | 13020 | | color | White to yellow or beige, darkening on exposure to light | | Odor | Odorless | | PH | 8.2 (10g/l, H2O, 25℃) | | PH Range | Red (1.2) to orange (3.4);Red (4.2) to yellow (6.3) | | Water Solubility | Soluble in water. Slightly soluble in ethanol. | | λmax | 437nm, 410nm, 493nm | | BRN | 4065488 | | Stability: | Reported to be unstable, but this is probably a mistake on a commercial MSDS sheet. Incompatible with strong oxidizing agents. | | Major Application | optical fibers, liquid crystal cells, holography, inks, toner, corrosion inhibitor, detergent | | CAS DataBase Reference | 845-10-3(CAS DataBase Reference) | | EPA Substance Registry System | Benzoic acid, 2-[[4-(dimethylamino)phenyl]azo]-, sodium salt (845-10-3) |
| | Methyl Red sodium salt Usage And Synthesis |
| Chemical Properties | orange powder | | Uses | Methyl Red sodium salt is used as a pH indicator. In microbiology, it is used to make agar plates in bacteriology. Further, it is used as a coloring agent and also finds use in mouthwash, toothpaste and in cosmetics. It is also employed as a rocket propellant. In addition to this, it is used in the preparation of reversible stain for rapid detection of stained cells in each specimen. | | General Description | Methyl red sodium salt is the sodium salt of methyl red synthetic dye, which belongs to the azo group of dyes. | | Biochem/physiol Actions | Methyl Red is a pH indicator and it changes color at a pH of 5.5. | | Purification Methods | It can be precipitated from aqueous solution as the free acid which is recrystallised from 95% EtOH, then reconverted to the sodium salt. In H2O it is pink at pH 4.2 and yellow at pH 6.2 and has at 437nm. |
| | Methyl Red sodium salt Preparation Products And Raw materials |
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