593-78-2

Basic information

• Product Name: Methyl hypochlorite
• Synonyms: Methyl hypochlorite;(Chlorooxy)methane;Hypochlorous acid methyl ester;Methoxy chloride
• CAS NO: 593-78-2
• Molecular Formula: CH₃ClO
• Molecular Weight: 66.48692
• Mol File: 593-78-2.mol
• Article Data: 3

Chemical Properties

• Boiling Point: -6°C (rough estimate)
• Appearance: /
• Density: 1.1000 (rough estimate)
• Vapor Pressure: 2240mmHg at 25°C
• Refractive Index: 1.3430 (estimate)
• CAS DataBase Reference: Methyl hypochlorite(CAS DataBase Reference)
• NIST Chemistry Reference: Methyl hypochlorite(593-78-2)
• EPA Substance Registry System: Methyl hypochlorite(593-78-2)

Safety Data

• Hazardous Substances Data: 593-78-2(Hazardous Substances Data)

Usage

InChI:InChI=1/CH3ClO/c1-3-2/h1H3

Upstream product

• 34557-54-5 methane 
• 2143-58-0 methylperoxy radical 

Downstream Products

• 812-01-1 methyl chlorosulfate 
• 2648-66-0 α,α-Dichloroacetophenone dimethyl acetal 
• 20372-72-9 (2-chloro-1-fluoroethyl)benzene 
• 3898-26-8 2-chloro-1-phenyl-1-methoxyethane 
• 622-25-3 1-(2-chlorovinyl)benzene 
• 111704-97-3 1-chloro-1-cyclopropyl-2-methoxy-1-phenylethane 
• 74947-79-8 syn-2-chloro-1-methoxyindane 
• 19598-11-9 trans-2-chloro-1-methoxyindan 
• 55056-03-6 2-chloro-3-methoxy-1-phenylpropan-1-one 
• 134219-96-8 3-chloro-2-methoxy-1-phenylpropan-1-one 
• 18424-56-1 trans-1-chloro-2-methoxycyclohexane 
• 20421-40-3 trans-1-chloro-2-fluorocyclohexane 
• 67-56-1 methanol 
• 64-18-6 formic acid 

Relevant articles and documents

Kinetics and products of the reactions of CH3O2 with Cl and ClO

The mechanisms of the reactions CH3O2 + Cl → products (1) and CH3O2 + ClO → products (2) have been studied at 298 K using a discharge flow reactor coupled to laser induced fluorescence for the detection of CH3O, observed as a product of both reactions, and mass spectrometry for the detection of other species. In the kinetic study of reaction (1), the channel producing the Criegee radical, CH2O2, has been found to be preponderant compared to the CH3O forming channel : CH3O2 + Cl → CH3O + ClO (1a), k1a = (2.0 ± 0.4) × 10-11 cm3 molecule-1 s-1 and CH3O2 + Cl → CH2O2 + HCl (1b), k1b = (2.0 ± 0.4) × 1010 cm3 molecule-1 s-1. The study of reaction (2) aimed at identifying the reaction pathways : CH3O2 + ClO → CH3O + ClOO (2a) and CH3O2 + ClO → CH3OCl + O2 (2b). The branching ratio for the first channel has been determined : α2a = 0.3 ± 0.1. These results are compared with other recent literature data and their atmospheric implication is briefly discussed.

Temperature-Dependent Rate Constants and Product Branching Ratios for the Gas-Phase Reaction Between CH3O2 and ClO

Kinetic and product branching data have been measured for the reaction of CH3O2 radicals with ClO in the temperature range 225-355 K using the discharge-flow/mass spectrometry technique.The pressure-independent overall reaction rate constant is described by k(12)(225-355 K) = (3.25 +/- 0.50) * 10-12 exp((-114 +/- 38)/T) cm3 molecule-1 s-1.Two reaction channels were identified, leading to CH3O + ClOO (12a) and CH3OCl + O2 (12b), respectively.The branching ratios, α12a = k12a/k12 and α12b = k12b/k12, are also independent of pressure and are described by α12a = (1.51 +/- 0.56) exp((-218 +/- 93)/T) and α12b = (0.080 +/- 0.059) exp((-377 +/- 178)/T).These expressions yield roughly equal rate constants of k12a and k12b of ca. 1 * 10-12 cm3 molecule-1 s-1 at the low temperatures prevalent in the polar winter and early springtime stratosphere.We thus identify CH3OCl as a potentially important species in ozone hole chemistry.