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2,3-Difluorobenzaldehyde

2,3-Difluorobenzaldehyde structure

CAS No:
2646-91-5
Formula:
C7H4F2O
Chemical Name:
2,3-Difluorobenzaldehyde
Synonyms:
Benzaldehyde,2,3-difluoro-;2,3-Difluorobenzaldehyde
Categories:
Organic Chemistry > Organic Fluorine Compound

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Description

clear pale yellow liquid

2,3-Difluorobenzaldehyde Basic Attributes

Molecular Weight：

142.1

Exact Mass：

142.10

BRN：

2961554

EC Number：

-0

DSSTox ID：

DTXSID90181059

HScode：

2913000090

Characteristics

PSA：

17.1

XLogP3：

1.6

Appearance：

Clear pale yellow Liquid

Density：

1.3±0.1 g/cm3

Melting Point：

64-65 °C

Boiling Point：

69-73 °C @ Press: 15 Torr

Flash Point：

137 °F

Refractive Index：

1.514

Storage Conditions：

Room temperature.

Safety Information

Packing level：

Ⅲ

Hazard category：

Transport codes：

UN 1989 3/PG 3

wgk germany：

hazard class code：

36/37/38

safety instructions：

26-37/39-36/37

Marks：

Hazard note：

Irritant

Precautionary statement(s)：

P261-P305 + P351 + P338

Hazard Statements：

H226-H315-H319-H335

GHS Classification：

|Warning|H226 (97.92%): Flammable liquid and vapor [Warning Flammable liquids]|P210, P233, P240, P241, P242, P243, P261, P264, P271, P280, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P370+P378, P403+P233, P403+P235, P405, and P501|Aggregated GHS information provided by 48 companies from 7 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

2,3-Difluorobenzaldehyde Use and Manufacturing

Methods of Manufacturing

(1) Apparatus: The connection type of the tubular reactor is determined according to Fig. 2, and the pipe type is: (3a + 3c) DC type channel + inclined square cake type variable diameter flat pipe, Pipeline diameter and volume according to the flow rate and reaction time to determine, Heat transfer medium for the heat transfer oil.(2) 6.06 g of cobalt acetate and 6.06 g of sodium molybdate were respectively dissolved200 mg of 2, 3-difluorotoluene and 200 ml of acetic acid to form a mixed solution at which time n (cobalt acetate): n (2, 3-difluorotoluene) = 0.015: 1, 6.06 g of sodium bromide was dissolved in35percent H2O2 to form H2O2-acetic acid solution, then n (sodium bromide):N (2, 3-difluorotoluene) = 0.015: 1, 2, 3-difluorotoluene-acetic acid solution with andH2O2-acetic acid solution at 5.56 ml / min and 11.11 ml / min, respectivelyOf the flow rate through the constant current pump into the continuous heat exchanger tube reactor, At this time n (H2O2): n (2, 3-difluorotoluene) = 2: 1, using Figure 2 microchannel reactor, Control reaction temperature 120 , residence time 1500s. Export material 0 cooling, The reaction was quenched with difluoromethane. After GC analysis, The conversion of 2, 3-difluorotoluene was 65.1percent and the yield of 2, 3-difluorobenzaldehyde was 48.2percent.

Uses

Intermediate for medicine, pesticide, liquid crystal material.

Computed Properties

Molecular Weight:142.10
XLogP3:1.6
Hydrogen Bond Acceptor Count:3
Rotatable Bond Count:1
Exact Mass:142.02302107
Monoisotopic Mass:142.02302107
Topological Polar Surface Area:17.1
Heavy Atom Count:10
Complexity:127
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

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