2,5-Diamino-1,4-dihydroxybenzene2HCl
2,5-Diaminohydroquinone Dihydrochloride
CAS: 24171-03-7
Molecular Formula: C6H10Cl2N2O2
2,5-Diamino-1,4-dihydroxybenzene2HCl - Names and Identifiers
2,5-Diamino-1,4-dihydroxybenzene2HCl - Physico-chemical Properties
| Molecular Formula | C6H10Cl2N2O2 |
| Molar Mass | 213.06 |
| Melting Point | >300°C |
| BRN | 5795549 |
| Storage Condition | Inert atmosphere,Room Temperature |
| Sensitive | Air Sensitive |
| MDL | MFCD00239416 |
2,5-Diamino-1,4-dihydroxybenzene2HCl - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| UN IDs | 2811 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 10-23 |
| Hazard Class | 6.1 |
| Packing Group | III |
2,5-Diamino-1,4-dihydroxybenzene2HCl - Uses and synthesis methods
application
2, 5-diamino-1, 4-dihydroxybenzene dihydrochloride is an intermediate in organic synthesis, which can be used in laboratory research and development and chemical and pharmaceutical synthesis. Polybenzoxazole prepared from high purity 2, 5-diamino-1, 4-dihydroxybenzene dihydrochloride can be spun into fibers with high tensile strength and good thermal stability.
Preparation
117.3 grams (0.5 moles) of 1,4-dihydroxy -2-chloro -2,5-dinitrobenzene, 400 ml glacial acetic acid, 41 grams (about 0.5 moles) of NaOAc, about 7.0 grams of 10% Pd/C and 100 ml of water are filled into a 1-liter corrosion-resistant nickel-based alloy (Hastalloy)C autoclave equipped with a gas dispersion stirrer and cooling coil. The H2 is introduced into the sealed reactor to make the pressure reach 400 psi and the temperature reach 40 ℃. During the reaction, the temperature is kept at 40 ℃ ~ 50 ℃. After a short induction period, the hydrogen consumption rate increases sharply, and the H2 pressure must be maintained at 100~400 psi during the reaction. When the reaction is complete, no H2 consumption is observed. After that, the reactor was cooled to room temperature, the reactor was opened, and 400 ml of concentrated hydrochloric acid containing 10 grams of SnCl2 · 2H2O was added. Filter and separate the crude product with catalyst, dissolve it in 200g of water at 85 ℃ and filter out the catalyst, add water (100-300 ml) and 500 ml of HCl to the above filtrate, and precipitate the substance without catalyst from the brown solution. Recrystallization in the original solvent, or separation of semi-pure substances and air-drying to obtain 100-dihydrochlorate of diaminoquinone, namely 2, 5-diamino-1, 4-dihydroxybenzene dihydrochloride crude product (based on 2, 5-diamino-1, 4-dihydroxybenzene The yield is 96.8% (mol)) 〕.
Last Update：2024-04-10 22:29:15
2,5-Diamino-1,4-dihydroxybenzene2HCl - Reference Information
| application | 2, 5-diamino-1, 4-dihydroxybenzene dihydrochloride is an intermediate in organic synthesis, which can be used in laboratory research and development and chemical medicine synthesis process. Polybenzoxazole prepared from high purity 2, 5-diamino-1, 4-dihydroxybenzene dihydrochloride can be spun into fibers with high tensile strength and good thermal stability. |
| preparation | 117.3g (0.5 mol) of 1,4-dihydroxy -2-chloro -2,5-dinitrobenzene, 400 ml glacial acetic acid and 41g (about 0.5 mol) of NaOAc in a corrosion-resistant nickel-based alloy (Hastalloy)C autoclave with a volume of 1 liter, about 7.0 grams of 10% Pd/C and 100 ml of water. The H2 is introduced into the sealed reactor to make the pressure reach 400 psi and the temperature reach 40 ℃. During the reaction, the temperature is kept at 40 ℃ ~ 50 ℃. After a short induction period, the hydrogen consumption rate increases sharply, and the H2 pressure must be maintained at 100~400 psi during the reaction. When the reaction is complete, no H2 consumption is observed. After that, the reactor was cooled to room temperature, the reactor was opened, and 400 ml of concentrated hydrochloric acid containing 10 grams of SnCl2 · 2H2O was added. Filter and separate the crude product with catalyst, dissolve it in 200g of water at 85 ℃ and filter out the catalyst, add water (100-300 ml) and 500 ml of HCl to the above filtrate, and precipitate the substance without catalyst from the brown solution. Recrystallization in the original solvent, or separation of semi-pure substances and air-drying to obtain 100-dihydrochlorate of diaminoquinone, namely 2, 5-diamino-1, 4-dihydroxybenzene dihydrochloride crude product (based on 2, 5-diamino-1, 4-dihydroxybenzene The yield is 96.8% (mol)) 〕. |
Last Update：2024-04-09 02:00:03
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CAS: 24171-03-7
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QQ: 3008007409
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CAS: 24171-03-7
Tel: 18301782025
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Mobile: 18021002903
QQ: 3008007409
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