Oxalyl chloride
Oxalyl chloride
CAS: 79-37-8
Molecular Formula: C2Cl2O2
Oxalyl chloride - Names and Identifiers
| Name | Oxalyl chloride |
| Synonyms | Oxaloylchloride OXALYL CHLORIDE Oxalyl chloride Oxalicdichloride Oxaloyl chloride oxalicdichloride Oxaloyl Chloride Oxalic Dichloride OXALYL DICHLORIDE Oxalyl Dichloride Oxalic dichloride Ethanedioyl Chloride OXALIC ACID CHLORIDE Oxalic Acid Chloride Oxalic Acid Dichloride Ethanedioyl Dichloride OXALIC ACID DICHLORIDE Oxalyl chloride solution 2.0 M in methylene chloride |
| CAS | 79-37-8 |
| EINECS | 201-200-2 |
| InChI | InChI=1/C2Cl2O2/c3-1(5)2(4)6 |
| InChIKey | CTSLXHKWHWQRSH-UHFFFAOYSA-N |
Oxalyl chloride - Physico-chemical Properties
| Molecular Formula | C2Cl2O2 |
| Molar Mass | 126.93 |
| Density | 1.5 g/mL at 20 °C (lit.) |
| Melting Point | -10--8 °C (lit.) |
| Boling Point | 62-65 °C (lit.) |
| Flash Point | 176-178°C |
| Water Solubility | reacts |
| Vapor Presure | 150 mm Hg ( 20 °C) |
| Vapor Density | 4.4 (vs air) |
| Appearance | Liquid |
| Color | APHA: 0-150 |
| Odor | penetrating odor |
| Exposure Limit | ACGIH: TWA 50 ppmOSHA: TWA 25 ppm; STEL 125 ppmNIOSH: IDLH 2300 ppm |
| Merck | 14,6914 |
| BRN | 1361988 |
| Storage Condition | Store Cold |
| Stability | Stable. Incompatible with bases, alcohols, steel, oxidizing agents, alkali metals. Moisture sensitive. Reacts violently with water, liberating toxic gas. |
| Sensitive | Moisture Sensitive |
| Refractive Index | n20/D 1.429(lit.) |
| Physical and Chemical Properties | colored fuming liquid with pungent odor. Water and ethanol can be vigorously decomposed, cooled to -12 deg C that condensed into white crystalline blocks. Decomposition and evolution of carbon monoxide occurred at 60 °c. Soluble in ether, benzene and chloroform, with corrosive and lacrimal. |
| Use | Mainly used in the synthesis of pesticides and pesticide intermediates and for the synthesis of other organic chlorides |
Oxalyl chloride - Risk and Safety
| Risk Codes | R14 - Reacts violently with water R20 - Harmful by inhalation R29 - Contact with water liberates toxic gas R34 - Causes burns R40 - Limited evidence of a carcinogenic effect R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R37 - Irritating to the respiratory system R35 - Causes severe burns R23 - Toxic by inhalation |
| Safety Description | 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. S43 - In case of fire use ... (there follows the type of fire-fighting equipment to be used.) S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S8 - Keep container dry. S24/25 - Avoid contact with skin and eyes. S23 - Do not breathe vapour. S27 - Take off immediately all contaminated clothing. |
| UN IDs | UN 2927 6.1/PG 2 |
| WGK Germany | 2 |
| RTECS | KI2950000 |
| FLUKA BRAND F CODES | 9-19-21 |
| TSCA | Yes |
| HS Code | 29171990 |
| Hazard Note | Toxic/Corrosive/Store Cold/Lacrymatory |
| Hazard Class | 8 |
| Packing Group | II |
Oxalyl chloride - Reference Information
| Decomposition | 176-178 ºC |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | oxalyl chloride is a kind of synthetic intermediate of medicine, pesticide, in medicine used as raw materials for the synthesis of antibiotics, in the coating used as raw materials for methacryloylphthalein isocyanate, pesticide industry for the synthesis of ultra-efficient sulfonylurea herbicides benzyl Huanglong, plant growth regulators, etc, it is widely used. |
| Use | oxalyl chloride, also known as oxalyl chloride, is an intermediate of benzoylurea insecticides, such as fluifolide, it is also an intermediate of sulfonylurea herbicides such as metsulfuron-methyl, bensulfuron-methyl, pemisulfuron-methyl and the like. In addition, it can also be used in medicine as a raw material for the synthesis of antibiotics. used in the synthesis of organic chlorides. Used as a military gas. commonly used as a military use of toxic gases, but also as a chlorinating agent in organic synthesis for the preparation of organic chlorides mainly used for sulfonylurea herbicides, pesticides, an important raw material for the synthesis of pharmaceutical chemistry intermediates, but also polyamide, Chemical Luminescence agent, high quality acylating agents in chemical industry such as liquid crystals are mainly used for the synthesis of pesticides and pesticide intermediates and for the synthesis of other organic chloride analysis reagents. It is mainly used as an important raw material intermediate for the synthesis of sulfonylurea herbicides, pesticides and medicinal chemistry. It is also a high quality acylating agent in the chemical industry such as polyamide, Chemical Luminescence agent, liquid crystal and other fields. |
| production method | prepared by the reaction of anhydrous oxalic acid and phosphorus pentachloride. The preparation method is to obtain oxalyl chloride by reacting oxalic acid with phosphorus pentachloride. The reaction equation is shown in the figure. After phosphorus pentachloride and anhydrous oxalic acid are mixed uniformly, they are slowly heated to about 64 ° C. And reacted until almost no hydrogen chloride is released, and the obtained crude product is further subjected to rectification to obtain oxalyl chloride. |
Last Update：2024-04-09 02:00:11
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