perphthalic acid
perphthalic acid
CAS: 2311-91-3
Molecular Formula: C8H6O5
perphthalic acid - Names and Identifiers
| Name | perphthalic acid |
| Synonyms | perphthalic acid monoperphthalic acid Monoperoxyphthalic acid Benzenecarboperoxoic acid, 2-carboxy- 2-Carboxy-1-benzeneperoxycarboxylic acid |
| CAS | 2311-91-3 |
| EINECS | 219-003-5 |
perphthalic acid - Physico-chemical Properties
| Molecular Formula | C8H6O5 |
| Molar Mass | 182.13 |
| Density | 1.507±0.06 g/cm3(Predicted) |
| Melting Point | 111 °C (decomp)(Solv: ligroine (8032-32-4); ethyl ether (60-29-7)(3:1)) |
| Boling Point | 407.3±47.0 °C(Predicted) |
| pKa | 3.32±0.36(Predicted) |
perphthalic acid - Upstream Downstream Industry
| Downstream Products | Propanamide, N-[4-cyano-3-(trifluoromethyl)phenyl]-2,3-dihydroxy-2-methyl- 8-Hydroxyquinoline-N-oxide |
perphthalic acid - Nature
| EPA chemical information | Benzenecarboperoxoic acid, 2-carboxy- (2311-91-3) |
Last Update：2024-04-10 22:29:15
perphthalic acid - Introduction
perphthalic acid (also known as peroxyterephthalic acid) is an inorganic peroxide with the chemical formula C6H4(CO2H)2O2. The following is a description of the nature, use, formulation and safety information of perphthalic acid:
Nature:
- perphthalic acid is a colorless crystalline solid, soluble in water and organic solvents.
-It is a strong oxidant that releases oxygen and decomposes in the air.
-its thermal stability is poor, easy to explode when heated or impacted.
Use:
- perphthalic acid can be used as an oxidant in organic synthesis, for example, for the oxidation of alcohols, carboxylic acids and other organic substances.
-In chemical analysis, it can also be used to determine the oxygen content of organic substances.
Preparation Method:
- perphthalic acid is mainly prepared by reacting phthalic acid with hydrogen peroxide. This reaction is generally carried out at low temperature, and an organic solvent is usually used as the reaction medium. The products of the reaction are perphthalic acid and water.
Safety Information:
- perphthalic acid is an oxidizing substance, avoid contact with flammable substances, combustible substances, etc.
-During storage and operation, conditions such as high temperature, friction and hitting must be avoided to prevent its instability from causing an explosion.
-use should wear protective glasses and gloves, avoid inhaling its dust or solution.
-If you swallow or touch your skin and eyes by accident, rinse immediately with plenty of water and seek medical assistance.
Please note that although perphthalic acid is a useful chemical, it is necessary to strictly follow safe operating procedures due to its oxidizing and explosive properties.
Nature:
- perphthalic acid is a colorless crystalline solid, soluble in water and organic solvents.
-It is a strong oxidant that releases oxygen and decomposes in the air.
-its thermal stability is poor, easy to explode when heated or impacted.
Use:
- perphthalic acid can be used as an oxidant in organic synthesis, for example, for the oxidation of alcohols, carboxylic acids and other organic substances.
-In chemical analysis, it can also be used to determine the oxygen content of organic substances.
Preparation Method:
- perphthalic acid is mainly prepared by reacting phthalic acid with hydrogen peroxide. This reaction is generally carried out at low temperature, and an organic solvent is usually used as the reaction medium. The products of the reaction are perphthalic acid and water.
Safety Information:
- perphthalic acid is an oxidizing substance, avoid contact with flammable substances, combustible substances, etc.
-During storage and operation, conditions such as high temperature, friction and hitting must be avoided to prevent its instability from causing an explosion.
-use should wear protective glasses and gloves, avoid inhaling its dust or solution.
-If you swallow or touch your skin and eyes by accident, rinse immediately with plenty of water and seek medical assistance.
Please note that although perphthalic acid is a useful chemical, it is necessary to strictly follow safe operating procedures due to its oxidizing and explosive properties.
Last Update：2024-04-10 22:29:15
perphthalic acid - Production method
In a 1L round bottom flask equipped with a stirrer and immersed in an ice salt bath, put 62g(0.5mol) of sodium carbonate monohydrate solution dissolved in 250ml of water. Cool to 0 degrees Celsius and add 69g(63ml,0.6mol) of hydrogen peroxide 30%. Keep the temperature at -5~0 ℃, and add 74g(0.5mol) phthalic anhydride that has been recrystallized in 14 mesh sieve or in benzene. The reaction mixture is vigorously stirred at -5~0 ℃ for 30min, then the obtained solution or suspension (sodium monoperoxyphthalate is insoluble) is poured into a 2L separatory funnel, 350ml of ether is added to shake to transfer all the reactants, and then 30ml of concentrated sulfuric acid is dissolved in an ice-cold solution of 150ml of water and carefully acidified. The precipitated mono-peroxyphthalic acid is extracted into ether and extracted with 2 parts of 150ml ether so that the extraction is complete. Combine ether extract, wash with 2 parts of 200ml 40% ammonium sulfate solution, and dry with 50g anhydrous magnesium sulfate in refrigerator overnight.
yield 71~78g(78% ~ 86%, calculated by phthalic anhydride).
Last Update：2024-04-10 22:29:15
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Downstream Products for perphthalic acid
Propanamide, N-[4-cyano-3-(trifluoromethyl)phenyl]-2,3-dihydroxy-2-methyl-
8-Hydroxyquinoline-N-oxide
8-Hydroxyquinoline-N-oxide