2,4,6-Trichlorophenol
2,4,6-Trichlorophenol
CAS: 88-06-2
Molecular Formula: C6H3Cl3O
2,4,6-Trichlorophenol - Names and Identifiers
2,4,6-Trichlorophenol - Physico-chemical Properties
| Molecular Formula | C6H3Cl3O |
| Molar Mass | 197.45 |
| Density | 1.49 |
| Melting Point | 64-66°C(lit.) |
| Boling Point | 246°C(lit.) |
| Flash Point | 99 °C |
| Water Solubility | 0.8 g/L |
| Solubility | 0.8g/l |
| Vapor Presure | 1 mm Hg ( 76.5 °C) |
| Appearance | Crystalline Mass or Crystalline Powder and Chunks |
| Color | white to slightly brown |
| Merck | 14,9644 |
| BRN | 776729 |
| pKa | 6.15 (Leuenberger et al., 1985) 6.10 (Blackman et al., 1955) 6.0 (Eder and Weber, 1980) |
| Storage Condition | Store below +30°C. |
| Refractive Index | 1.5300 (estimate) |
| Physical and Chemical Properties | Density 1.49 melting point 65-68°C boiling point 246°C flash point 99°C water-soluble 0.8g/L |
| Use | It is mainly used as the main raw material of bactericide and preservative prochloraz |
2,4,6-Trichlorophenol - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R36/38 - Irritating to eyes and skin. R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R40 - Limited evidence of a carcinogenic effect R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R39/23/24/25 - R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R11 - Highly Flammable R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S36/37 - Wear suitable protective clothing and gloves. S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S16 - Keep away from sources of ignition. |
| UN IDs | UN 3077 9/PG 3 |
| WGK Germany | 3 |
| RTECS | SN1575000 |
| TSCA | Yes |
| HS Code | 29081000 |
| Hazard Class | 6.1 |
| Packing Group | III |
| Toxicity | LD50 orally in Rabbit: 887 mg/kg |
2,4,6-Trichlorophenol - Reference Information
| Henry's Law Constant | 9.07 at 25 °C (estimated, Leuenberger et al., 1985a) |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| (IARC) carcinogen classification | 2B (Vol. 117) 2019 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | trichlorophenol in the industry is mainly used in the production of dye intermediates, pesticides and preservatives and other products. Due to the non-standard discharge, it often appears in the coking, printing and dyeing, wood preservation and other industries in the wastewater, and the presence of trichlorophenol has been detected in natural water. 2,4, 6-trichlorophenol (2,4,6-TCP), as a typical and widely used industrial raw material, has a "three" effect on human body and aquatic animals and plants, it is a toxic organic pollutant and has been listed as a priority control pollutant by the US Environmental Protection Agency. |
| degradation method | (1) start-up of SBR Reactor: the inoculated sludge of this system is sludge from secondary sedimentation tank of municipal wastewater treatment plant, after inoculation, the sludge concentration of SBR Reactor is maintained at 4000 ~ 5000mg/L; (2) the operation is as follows: The first stage: for a period of 0 to 36 days, the domestication system only introduces the water distribution containing 2,4, 6-trichlorophenol, and the 2,4, 6-trichlorophenol is added from low concentration to high concentration, that is, 10mg/L ~ 80mg/L, after each concentration, when the effluent can not detect 2,4, 6-trichlorophenol, 4, 6-trichlorophenol influent concentration, until the microbial degradation of chlorophenol reaches the maximum, indicating that the first stage of domestication is completed; The second stage: while maintaining the water after the first stage of domestication, the introduction of sucrose water distribution was started, so that the microorganisms in the SBR Reactor could gradually use sucrose as a co-metabolic organic carbon source, and the 2,4, 6-trichlorophenol could not be detected by the drainage system, which indicated that the domestication process was completed, the system entered a stable operation phase. The drainage ratio of SBR Reactor during operation is 50%; In the first stage of domestication, the system does not discharge activated sludge, and the sludge discharge is started in the second stage of operation, so that the sludge age (SRT) of the system the sludge concentration was maintained at about 4000 ~ 5000mg/L for 30~35 days. In the second stage, the sucrose concentration in the system was L-536mg mg/L. during the acclimation, the stirring was started to make the SBR Reactor in a completely mixed state, and the gas flow meter was adjusted to maintain the dissolved oxygen in the SBR Reactor at 1-2mg/L. The SBR Reactor is operated for two cycles a day, and the total hydraulic retention time (HRT) is 16 to 20 hours. |
| Use | 2,4, 6-trichlorophenol is an intermediate of the fungicide prochloraz and the herbicide cumin. 2,4, 6-trichlorophenol is a widely used insecticide for controlling insects, fungi, plants and bacteria. It has become a common environmental pollutant and a possible human carcinogen. It is mainly used for bactericides, pesticides and pharmaceutical intermediates. Used as a dye intermediate, fungicide, preservative, also used as a solvent for polyester fiber. |
| production method | the preparation method is to put phenol into the reactor and pass chlorine gas for about 12h, the initial reaction temperature is 60~65 ℃, and the latter 2~3H is 70~75 ℃. After the chlorine gas is passed, the temperature is kept for 1H, and the amount of chlorine gas is 3 times of the amount of phenol, strict follow-up analysis, to prevent excessive chlorine gas, and then into the nitrogen to remove excess chlorine and hydrogen chloride, the reaction of the crude product by sodium sulfite treatment, and then distilled to get the product. |
| category | toxic substances |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 820 mg/kg; Intraperitoneal-rat LD50: 276 mg/kg |
| stimulation data | Skin-rabbits 20 mg/24 h moderate; eye-rabbit 0.25 mg/24 h severe |
| flammability hazard characteristics | open flame flammable; Toxic chloride gas emitted by heat |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored and transported separately from food raw materials |
| fire extinguishing agent | carbon dioxide, sand, foam, dry powder |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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