Introduction：Basic information about Methyl Red sodium salt CAS 845-10-3, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.
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;Indicator (pH);pH Indicators;Organics |
| Mol File: | 845-10-3.mol |
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Methyl Red sodium salt Chemical Properties
| Melting point | 178-182 °C |
| Boiling point | 64.7 °C |
| bulk density | 360kg/m3 |
| density | 0.791 |
| Fp | 12 °C |
| storage temp. | Store at +5°C to +30°C. |
| solubility | H2O: soluble |
| pka | 2.3, 5.0(at 25℃) |
| form | Solid |
| 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 |
| InChI | 1S/C15H15N3O2.Na/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);/q;+1/p-1/b17-16+; |
| InChIKey | GNTPCYMJCJNRQB-CMBBICFISA-M |
| SMILES | [Na+].CN(C)c1ccc(cc1)\N=N\c2ccccc2C([O-])=O |
| 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) |
Safety Information
| Hazard Codes | Xn,C,F |
| Risk Statements | 40-34-11 |
| Safety Statements | 36/37-24/25-45-36/37/39-26-16 |
| RIDADR | UN 1170 3/PG 2 |
| WGK Germany | 3 |
| TSCA | TSCA listed |
| HazardClass | 3 |
| PackingGroup | II |
| HS Code | 29270000 |
| Storage Class | 11 - Combustible Solids |
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
