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2,3-Dichlorobenzaldehyde

2,3-Dichlorobenzaldehyde structure

CAS No:
6334-18-5
Formula:
C7H4Cl2O
Chemical Name:
2,3-Dichlorobenzaldehyde
Synonyms:
Benzaldehyde,2,3-dichloro-;2,3-Dichlorobenzaldehyde;NSC 28450
Categories:
Chemical Reagents > Organic Reagents

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Description

white crystalline powder

2,3-Dichlorobenzaldehyde Basic Attributes

Molecular Weight：

175.01

Exact Mass：

175.01

BRN：

508198

EC Number：

228-711-3

UNII：

H6GN7Q4PCS

NSC Number：

28450

DSSTox ID：

DTXSID7064239

HScode：

29130000

Characteristics

PSA：

17.1

XLogP3：

Appearance：

White Crystalline Powder

Density：

1.4±0.1 g/cm3

Melting Point：

65-67 °C

Boiling Point：

143-145°C30mm

Flash Point：

135°C

Refractive Index：

1.601

Storage Conditions：

Store below +30°C.

Safety Information

Packing level：

III

Hazard category：

Transport codes：

UN 3261 8/PG 2

wgk germany：

hazard class code：

34-36/37/38

safety instructions：

26-36/37/39-45-37/39

Marks：

C,Xi

Hazard note：

Corrosive

Stability/Shelf Life：

Stable under normal temperatures and pressures.

Precautionary statement(s)：

P280-P305 + P351 + P338-P310

Hazard Statements：

H314

GHS Classification：

|Danger|H314 (55.21%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]|P260, P261, P264, P271, P273, P280, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P321, P332+P313, P362, P363, P403+P233, P405, and P501|Aggregated GHS information provided by 96 companies from 9 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

2,3-Dichlorobenzaldehyde Use and Manufacturing

Methods of Manufacturing

(1) Device: Refer to Figure 2 to determine the connection of the tubular reactor, the type of pipe: (3a + 3e) DC channel + Corningde Heart Cel 1 structure, pipe diameter and volume according to the flow rate and reaction time to determine the heat transfer Medium for the heat transfer oil. [0040] (2) 6.06 g of cobalt acetate and 6.06 g of sodium molybdate were dissolved in 200 ml of 2, 3-dichlorotoluene and 200 ml of acetic acid to form a mixed solution at which time η (cobalt acetate): η (2, 3-dichlorotoluene ) = 0.015: 1, 6.06 g of sodium bromide was dissolved in 25percent H22 to form H22-acetic acid solution, where η (sodium bromide): η (2, 3-dichlorotoluene) = 0.015: 1 , 2, 3-dichlorotoluene-acetic acid solution and H22-acetic acid solution were injected into the continuous heat transfer tubular reactor at a flow rate of 5.56 ml / min and ll.llml / min, respectively, when η (H2' 2):? (2, 3-dichlorotoluene) = 2: 1, using Figure 2 microchannel reactor, Control reaction temperature 90 ° C, residence time 1200s. The outlet material was cooled at 0 ° C and the reaction was quenched with dichloromethane. The yield of 2, 3-dichlorotoluene was 42.8percent and the yield of 2, 3-dichlorobenzaldehyde was 29.0percent by GC analysisIn a 1L reactor, add 61.5 g of 2, 3-dichlorotoluene, 3.075 g of azobisisobutyronitrile (5percent), 215.25 g of 2-dichloroethane, heat the mixture at 75 ° C and add 44 g of bromine drop wise, reflux reaction till red bromine fades , Intermittent drip and 136.2g27.5percent hydrogen peroxide continues to react till red bromine no longer generates. Add a 49.2g30percent aqueous solution of sodium carbonate to the reaction solution, reflux reaction for 8 h , at the same time recover1, 2-dichloroethane.The hydrolyzate is heated and filtered at 80° C, into organic phase add 246g 1, 4-Dioxane , add 40percent of the catalyst HBr6.15g, add 27.5percent hydrogen peroxide 38.3g, react at 25 ° C for 7 h. The reaction system is extracted three times with 1, 2-dichloroethane, the organic phase is concentrated and obtained crude 2, 3-dichlorobenzaldehyde, re-crystallization from ethanol and obtained 48.19 g of 2, 3-dichlorobenzaldehyde, GC purity is 99.26percent and yield is 72.1percent.

Uses

Used as an intermediate for felodipine and as a dye intermediate

Manufacturing Info：

Benzaldehyde, 2,3-dichloro-: ACTIVE

Computed Properties

Molecular Weight:175.01
XLogP3:3
Hydrogen Bond Acceptor Count:1
Rotatable Bond Count:1
Exact Mass:173.9639201
Monoisotopic Mass:173.9639201
Topological Polar Surface Area:17.1
Heavy Atom Count:10
Complexity:127
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

Sodium nitrite

Cuprous chloride

1,2-Dichlorobenzene

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2,3-Dichlorobenzaldehyde CAS6334-18-5

CAS No.: 6334-18-5

Grade: Pharmaceutical grade

Content: 99%

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