?? ??
|
|
?? ?? ??
- ???
- 179-182 °C (lit.)
- ?? ?
- 412.44°C (rough estimate)
- ??
- 0.839 g/mL at 25 °C
- ?? ??
- 300-500kg/m3
- ?? ??
- 9.3 (vs air)
- ???
- 1.5930 (estimate)
- ???
- 11 °C
- ?? ??
- Store at +5°C to +30°C.
- ???
- ???: ???1mg/mL
- ?? ?? ??
- 13020
- ??? ??
- ??
- ??? ??
- ??? ??
- ?? ?? (pKa)
- 4.95(at 25℃)
- ??
- ?? ???
- ??
- ?? ??
- pH ??
- 4.4(red)-6.3(yellow)
- ???
- ?? ?? ?? ????. ???, ????? ????, ???? ?????. ?? ???.
- ε (????)
- ≥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
- ???
- ????. ?? ???? ???? ????.
- ?? ??
- ???, LED ??, ??????, ??, ?-? ????, ?? ??, ???, ???, ?? ??, ?? ??? ??, ?? ??, ?? ??? ??, ?? ??, ???? ??
- 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 ??????
- 493-52-7
- IARC
- 3 (Vol. 8, Sup 7) 1987
??
- ?? ? ?? ??
- ?? ? ???? ?? (GHS)
| ??? ?? | Xn,T,F,Xi,C,N | ||
|---|---|---|---|
| ?? ???? ?? | 10-20/21/22-68/20/21/22-68-36/38-23/25-11-36/37/38-34-51/53-39/23/24/25-23/24/25 | ||
| ????? | 36/37-24/25-22-45-33-24-16-7-36-26-36/37/39-61 | ||
| ????(UN No.) | UN 1170 3/PG 2 | ||
| WGK ?? | 1 | ||
| RTECS ?? | DG8960000 | ||
| TSCA | TSCA listed | ||
| ?? ?? | 3 | ||
| ???? | II | ||
| HS ?? | 29270000 | ||
| ???? ??? | 11 - Combustible Solids | ||
| ?? ?? ??? | 493-52-7(Hazardous Substances Data) | ||
| ???? ?? | KE-06693 |
?? ?? C??? ??, ??, ??
??? ??
dark red crystalline powder??
As indicator in 0.1% alcoholic solution; pH: 4.4 red, 6.2 yellow. Used for titrating NH3, weak organic bases, e.g., alkaloids; not suitable for organic acids, except oxalic and picric acid. Methyl red is easily reduced, thereby losing its color, and readings should be made promptly. It is gradually being replaced by sulfonphthalein indicators, such as bromcresol green, which are more stable and exhibit a sharper change in color.?? ??
2-Aminobenzoic aciddiazo, and N,N-dimethylaniline coupling.??
An acid–base indicator that is red in solutions below a pH of 4.2 and yellow above a pH of 6.3. It is often used for the same types of titration as methyl orange but the transition range of methyl red is nearer neutral (pH7) than that of methyl orange. The two molecules are structurally similar.?? ??
Methyl red solution is an azo dye which turns to red when pH is below 4.4 (yellow pH < 6.2, orange pH 4.4-6.2). Some bacteria utilize glucose to form large amounts of acid with the result that the pH value of the medium falls distinct. Other species produce no or less free acid. This difference can be visualized by using methyl red. This test is used to differentiate enteric bacteria.???
Questionable carcinogen.Safety Profile
Questionable carcinogen with experimental tumorigenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx.Purification Methods
The acid is extracted with boiling toluene using a Soxhlet apparatus. The crystals which separate on slow cooling to room temperature are filtered off, washed with a little toluene and recrystallised from glacial acetic acid, *benzene or toluene followed by pyridine/water. Alternatively, dissolve it in aqueous 5% NaHCO3 solution, and precipitate it from a hot solution by dropwise addition of aqueous HCl. Repeat this until the extinction coefficients do not increase. [Beilstein 16 IV 504.]?? ?? ?? ?? ? ???
???
?? ??
?? ?? ?? ??
???( 485)?? ??
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