PentachloropentadienoicAcid
jet fuel
CAS: 87-86-5
Molecular Formula: C6HCl5O
PentachloropentadienoicAcid - Names and Identifiers
PentachloropentadienoicAcid - Physico-chemical Properties
| Molecular Formula | C6HCl5O |
| Molar Mass | 266.34 |
| Density | 1.978g/mLat 25°C(lit.) |
| Melting Point | 165-180°C(lit.) |
| Boling Point | 310°C(lit.) |
| Flash Point | 11°C |
| Water Solubility | 80 mg l-1(30 °C) |
| Vapor Presure | 40 mm Hg ( 211.2 °C) |
| Vapor Density | 9.2 (vs air) |
| Appearance | Liquid |
| Specific Gravity | 1.979 |
| Exposure Limit | NIOSH REL: IDLH 0.5 mg/m3, IDLH 2.5 mg/m3; OSHA PEL: TWA0.5 mg/m3; ACGIH TLV: TWA 0.5 mg/m3 |
| Merck | 7109 |
| BRN | 1285380 |
| pKa | 4.80 (Blackman et al., 1955)5.3 (Eder and Weber, 1980) |
| Storage Condition | 0-6°C |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Refractive Index | 1.6310 (estimate) |
| Physical and Chemical Properties | Pure product is white crystal. Melting point: 174 ℃ with 1 crystal water; Anhydrous 191 ℃, boiling point 309-310 ℃(100.525kPa, decomposition), relative density 1.978(22/4 ℃). Soluble in dilute lye and organic solvents such as acetone, ethanol, ether, benzene, etc., slightly soluble in water. |
PentachloropentadienoicAcid - Risk and Safety
| Risk Codes | R24/25 - R26 - Very Toxic by inhalation R36/37/38 - Irritating to eyes, respiratory system and skin. R40 - Limited evidence of a carcinogenic effect R50/53 - Very toxic 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 R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S22 - Do not breathe dust. S36/37 - Wear suitable protective clothing and gloves. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S52 - Not recommended for interior use on large surface areas. 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. S16 - Keep away from sources of ignition. S7 - Keep container tightly closed. |
| UN IDs | UN 3155 6.1/PG 2 |
| WGK Germany | 3 |
| RTECS | SM6300000 |
| HS Code | 29081100 |
| Hazard Class | 6.1(a) |
| Packing Group | II |
| Toxicity | Pentachlorophenol (PCP) is very toxic to plants and are used as preharvest defoliants and general herbicides. Their use as herbicides is currently restricted to nonagricultural uses along drainage ditches, driveways, and fencerows. Commercial (technical) grades of PCP commonly contain manufacturing by- products, such as dioxin (HxCDD), which can be more toxic than the PCP itself. Another contaminant in PCP is HCB (Hexachlorobenzene). The use of PCP is being phased out because of the discovery of these highly toxic contaminants (9). PCP is a Restricted Use Pesticide (RUP). Restricted Use Pesticides may be purchased and used only by certified applicators. In 1988 the EPA announced further restrictions on the use of PCP as in the pulp and paper industry where it is used in paper coatings, sizing, adhesives and in inks. Registration for use in cooling towers and for certain oil well operations was also cancelled. The 1988 regulations also required compliance with dioxin (HxCDD) concentration limits in the final product. |
PentachloropentadienoicAcid - Reference Information
| Henry's Law Constant | 21 (quoted, Petrasek et al., 1983) |
| (IARC) carcinogen classification | 1 (Vol. 53, 71, 117) 2019 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | pentachlorophenol (PCP) is white flake or crystalline solid in appearance, usually containing one molecule of crystal water, it is slightly hot and has a strong spicy smell. When it is dissolved in water, it generates corrosive hydrochloric acid gas; Industrial products are gray-black powder or flaky solid, melting point 187~189 ℃, boiling point about 309-310 ℃ (decomposition). Insoluble in water, solubility (20 ℃)20~25mg/L, soluble in most organic solvents such as ethanol, ether, benzene, slightly soluble in cold petroleum ether, but the solubility in carbon tetrachloride and paraffin is not large. It is acidic and has no corrosive effect on most metals in the absence of moisture. It reacts with sodium hydroxide to form white sodium salt crystals soluble in water. Incompatible with strong oxidants. Good stability, no ignition in air at 550 ℃. It is produced industrially from the direct chlorination of phenol in the presence of a catalyst or from hexachlorocytoses (α,β-isomers). Pentachlorophenol (PCP) is an important preservative, it can prevent the growth of fungi, inhibit bacterial corrosion, has long been used as leather and wood fungicides, it is effective for the control of mold and general insects (such as termites), and its sodium salt is used to eliminate the intermediate host of schistosomiasis, Oncomelania hupensis, and control the grass. Sensitive to fish and other aquatic animals, water content of 0.1-0.5ppm is lethal. Organic drugs, can be absorbed through the skin, the liver, kidney damage. Ingestion can lead to poisoning and death in severe cases. However, in the past decade, medical research has found that if you often contact with products containing pentachlorophenol (PCP), it is very likely to affect human health, and the symptoms include Head Pain, Abdominal Pain, vomit and the central nervous system damage. The German government has established legislation to limit the content of pentachlorophenol (PCP) to 5ppm, which applies to a variety of products that have been treated with PCP and PCP compounds, such as bags and wristbands. All products exported to the German market must pass the above tests. China's ecological textile standards and the international ecological textile association of the oeko-tex standard 100 of the PCP residues in textiles should not exceed 0.5mg/kg (infant products should not exceed 0.05mg/kg) limit. |
| Use | is used in organic synthesis, control of rice fields, and wood preservation. Is also widely used fungicide, sterilization effect is high, suitable for polyvinyl chloride and other plastics, coatings, leather, adhesives, rubber, fiber, paper, etc., the general dosage of 0.1-0.5%. It is also effective for the control of termites, snails and the like. use as jet engine fuel use as reference material for pesticide analysis |
| production method | sodium pentachlorophenol is prepared by high-pressure hydrolysis using hexaenoic acid as raw material and then acidified. |
| category | pesticide |
| toxicity grade | highly toxic |
| Acute toxicity | oral-rat LD50: 27 mg/kg; Oral-mouse LD50: 36 mg/kg |
| stimulation data | Skin-moderate in rabbits at 10 mg/24 h; eye-rabbit 0.1/24 h mild |
| flammability hazard characteristics | non-combustible; Thermal decomposition of toxic chloride gases |
| 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 | Sand, dry powder, foam |
| Occupational Standard | TWA 0.5 mg/m3; Tel 1.5 mg/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-threatening and health concentration | 2.5 mg/m3 |
Last Update：2024-04-09 20:52:54
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