3,4-dichlorophenyl isocyanate
3,4-dichlorophenyl isocyanate
CAS: 102-36-3
Molecular Formula: C7H3Cl2NO
3,4-dichlorophenyl isocyanate - Names and Identifiers
3,4-dichlorophenyl isocyanate - Physico-chemical Properties
| Molecular Formula | C7H3Cl2NO |
| Molar Mass | 188.01 |
| Density | 1.3256 (rough estimate) |
| Melting Point | 41-43°C(lit.) |
| Boling Point | 118-120°C18mm Hg(lit.) |
| Flash Point | >230°F |
| Water Solubility | decomposes |
| Vapor Presure | 0.2 mm Hg ( 20 °C) |
| Appearance | powder to lump |
| Color | White to Almost white |
| BRN | 608325 |
| Sensitive | Moisture Sensitive |
| Refractive Index | 1.5750 (estimate) |
| Physical and Chemical Properties | This product is a solid, m.p.42 ~ 44 ℃, B. p.118 ~ 120 ℃/2.34 kPa, F. P.>230 F (110 ℃), soluble in toluene, chlorobenzene and other solvents. |
| Use | Used as pharmaceutical, pesticide intermediates |
3,4-dichlorophenyl isocyanate - Risk and Safety
| Hazard Symbols | T - Toxic |
| Risk Codes | R23 - Toxic by inhalation R36/37/38 - Irritating to eyes, respiratory system and skin. R42 - May cause sensitization by inhalation |
| Safety Description | S22 - Do not breathe dust. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 2250 6.1/PG 2 |
| WGK Germany | 2 |
| RTECS | NQ8760000 |
| FLUKA BRAND F CODES | 1-8-10-19 |
| TSCA | Yes |
| HS Code | 29291090 |
| Hazard Class | 6.1 |
| Packing Group | II |
3,4-dichlorophenyl isocyanate - Reference Information
| LogP | 3.88 |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | 3, 4-dichlorophenyl isocyanate is an intermediate of the herbicides rigulon, draconon, and trichloron. used as pesticide intermediates in the production of Rigu-on, on. used as pesticide and pharmaceutical intermediates, mainly used in the synthesis of herbicides such as trichlorfon and trichlorfon used as pharmaceutical and pesticide intermediates |
| production method | is obtained by reacting 3, 4-dichloroaniline with phosgene. The preparation method is to add toluene as a solvent in the reaction kettle, and inject a certain amount of phosgene under cooling, and then add toluene solution of 3, 4-dichloroaniline dropwise, and constant stirring for a certain time, control the reaction temperature at 0~3 ℃, and then move to the thermal reaction pot to continue to feed phosgene, and heated to a certain temperature, at this time there are a large number of hydrogen chloride and phosgene escape, after absorption with toluene, the tail gas enters the tail gas treatment unit, and the solution is turned into a transparent liquid. At the end of the reaction, nitrogen is used to remove the remaining phosgene and hydrogen chloride, and then it is transferred to the distillation kettle, and the solvent is distilled off to obtain the finished product. |
| category | toxic substances |
| toxicity grade | highly toxic |
| Acute toxicity | inhalation-rat LC50:0.14g/m3/2 H; Inhalation-mouse LC50:0.14g/m3/2 h |
| flammability hazard characteristics | flammable; Toxic chloride and nitrogen oxide gases from combustion |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; Separate from oxidant, acid and food |
| extinguishing agent | dry powder, sand, foam, carbon dioxide |
| Occupational Standard | SEL 0.3 mg/m3 |
| 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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