imidacloprid impurity
2-Chloro-5-chloromethylpyridine
CAS: 70258-18-3
Molecular Formula: C6H5Cl2N
imidacloprid impurity - Names and Identifiers
imidacloprid impurity - Physico-chemical Properties
| Molecular Formula | C6H5Cl2N |
| Molar Mass | 162.02 |
| Density | 1.4411 (rough estimate) |
| Melting Point | 37-42°C(lit.) |
| Boling Point | 267.08°C (rough estimate) |
| Flash Point | >230°F |
| Water Solubility | Insoluble in water. |
| Vapor Presure | 0.177mmHg at 25°C |
| Appearance | White crystal |
| Color | Beige |
| BRN | 1635690 |
| pKa | -0.75±0.10(Predicted) |
| Storage Condition | Inert atmosphere,2-8°C |
| Refractive Index | 1.6000 (estimate) |
| MDL | MFCD00125366 |
| Physical and Chemical Properties | pure 2-chloro-5-chloromethylpyridine as colorless crystals, m. P. 35-36 °c, B. p.88 ~ 90 ℃/400pa, industrial products are orange-red liquid or viscous, irritating odor, soluble in a variety of organic solvents, weak alkaline, soluble in organic acids. |
| Use | It is used as an intermediate of pesticide imidacloprid and pyridinium; 2-chloro-5-chloromethylpyridine is an intermediate of insecticide imidacloprid and acetamiprid. |
imidacloprid impurity - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R34 - Causes burns R36 - Irritating to the eyes R10 - Flammable |
| 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. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S25 - Avoid contact with eyes. S36 - Wear suitable protective clothing. S16 - Keep away from sources of ignition. |
| UN IDs | UN 3261 8/PG 2 |
| WGK Germany | 3 |
| HS Code | 29333999 |
| Hazard Note | Corrosive/Harmful |
| Hazard Class | LACHRYMATOR, CORROSI |
| Packing Group | II |
imidacloprid impurity - Reference Information
| Use | 2-chloro-5-chloromethylpyridine is an intermediate of the insecticides imidacloprid and acetamiprid. It is used as an intermediate of pesticide imidacloprid and pyridinium; 2-chloro-5-chloromethylpyridine is an intermediate of insecticide imidacloprid and acetamiprid. It is mainly used as an intermediate in the production of agricultural chemicals Imidacloprid and pyridinium and pharmaceuticals. |
| production methods | There are many synthetic methods of 2-chloro-5-chloromethylpyridine, currently, 2-chloro-5-methylpyridine is used as raw material in industry, that is, 2-chloro-5-methylpyridine is used for branched-chain chlorination in the presence of catalyst, 2-chloro-5-chloromethylpyridine was obtained. Add 2-chloro-5-methylpyridine and the solvent to the chlorination kettle, add the catalyst, and enter chlorine gas for reaction under reflux condition. After the reaction is finished, dissolve under normal pressure, the former fraction was removed under vacuum in the still vessel to obtain 2-chloro-5-chloromethylpyridine from the bottom. In addition, there are various routes using nicotinic acid as a raw material, 3-methylpyridine as a raw material, 2-chloro-5-trichloromethylpyridine as a raw material, and the like. One common feature of these processes is the formation of a pyridine ring followed by chloromethylation. Another route developed by the United States company (Reilly Industries Inc.), cyclopentadiene and propionaldehyde as the starting material, direct cyclization to produce 2-chloro-5-chloromethylpyridine, the purity of the product is up to 95%, without the isomer 2-chloro-3-chloromethylpyridine. |
Last Update：2024-04-10 22:29:15
imidacloprid impurity - Introduction
2-chloro -5-chloromethyl pyridine (y, referred to as CCMP) is a key intermediate of new and efficient pesticide Imidacloprid (Imidacloprid) and pyridoxine (NI 25), it is also the most insecticidal part of this class of pesticide molecules, and through its alkylation reaction, condensation reaction with heterocyclic ring N-H and ammoniation with 1-nitro-2, the reaction of 2-bis (thiomethyl) ethylene can also prepare a series of new insecticides and acaricides, which are important intermediates in the synthesis of pesticides and medicines.
Last Update：2024-04-09 01:59:49
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