93-76-5
2,4,5-trichlorophenoxyacetic acid
CAS: 93-76-5
Molecular Formula: C8H5Cl3O3
93-76-5 - Names and Identifiers
93-76-5 - Physico-chemical Properties
| Molecular Formula | C8H5Cl3O3 |
| Molar Mass | 255.48 |
| Density | 1.6048 (rough estimate) |
| Melting Point | 154-158°C(lit.) |
| Boling Point | 361.82°C (rough estimate) |
| Flash Point | 2°C |
| Water Solubility | 238mg/L(20 ºC) |
| Solubility | Soluble in ethanol (548.2 mg/L), ether (243.2 mg/L), heptane (400 mg/L), xylenes (6.8 g/L),methanol (496 g/L), toluene (7.32 g/L) (quoted, Keith and Walters, 1992). |
| Vapor Presure | 6.46 at 25 °C (Lewis, 1989) |
| Appearance | crystalline |
| Color | off-white to yellow |
| Exposure Limit | NIOSH REL: TWA 10 mg/m3, IDLH 250 mg/m3; OSHA PEL: TWA10 mg/m3; ACGIH TLV: TWA 10 mg/m3. |
| Merck | 13,9111 |
| pKa | 2.80 and 2.83 at 25 °C (ionic strength <0.01 M, Jafvert et al., 1990)2.88 (Nelson and Faust, 1969) |
| Storage Condition | 0-6°C |
| Stability | Stable. Incompatible with strong bases, strong oxidizing agents, alkali metals, amines, alcohols. Reacts with many common metals. |
| Refractive Index | 1.4700 (estimate) |
| Physical and Chemical Properties | Melting point 154-158°C(lit.) flash point 2°C storage conditions 0-6°C form crystalline off color-white to yellow Merck 13,9111 |
93-76-5 - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R36 - Irritating to the eyes R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R11 - Highly Flammable |
| Safety Description | S24 - Avoid contact with skin. 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. S36/37 - Wear suitable protective clothing and gloves. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S16 - Keep away from sources of ignition. |
| UN IDs | UN 2811 6.1/PG 3 |
| WGK Germany | 3 |
| RTECS | AJ8400000 |
| HS Code | 29189100 |
| Hazard Class | 6.1(b) |
| Packing Group | III |
| Toxicity | LC50 (96-hour) for rainbow trout 350 mg/L and carp 355 mg/L (Hartley and Kidd, 1987); acute oral LD50 for rats 500 mg/kg (Hartley and Kidd, 1987), 300 mg/kg (RTECS, 1985). |
93-76-5 - Reference Information
| Henry's Law Constant | 4.87 at 25 °C (approximate - calculated from water solubility and vapor pressure) |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| production method | the hydrogen chloride molecule is removed from 2,4, 5-trichlorophenol and monochloroacetic acid. |
| category | pesticide |
| toxicity grade | high toxicity |
| Acute toxicity | oral-rat LD50: 300 mg/kg; Oral-mouse LD50: 242 mg/kg |
| flammability hazard characteristics | toxic chloride gases from combustion |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored and transported separately from food raw materials |
| extinguishing agent | dry powder, foam, sand |
| Occupational Standard | TWA 10 mg/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-threatening and health concentration | 250 mg/m3 |
Last Update：2024-04-10 22:29:15
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