≥98.0% 2,4-Difluorobenzaldehyde CAS No.: 1550-35-2

C₇H₄F₂O

CAS No.: 1550-35-2

24-Difluorobenzaldehyde CAS No 1550-35-2

Application

Create a slurry with 57 g of 1,3-difluorobenzene (0.5 mol) and 66.7 g of AlCl3 (0.5 mol), then transfer the mixture to the autoclave. To this combination, add 5 drops of concentrated HCl, close the autoclave cover, and place the mixture inside. In order to remove the air, pass N2. Once the heated mixture reaches 60°C, begin passing CO and purging with CO three times. The system pressure increases to 1.5 MPa during each purge. Following the third purge, CO was added and kept at a pressure of 1.5 MPa, during which the reaction was sustained for around 20 hours. Once the reaction is finished, allow it to cool, then transfer the resultant liquid into around 300 milliliters of ice water and add 300 milliliters of cyclohexane. After removing the top organic layer with a separatory funnel and giving it three water washes, dry it over anhydrous magnesium sulfate. The layer of water Recover cyclohexane and unreacted 1,3-difluorobenzene by vacuum distilling the dried organic phase after performing the AlCl3 recovery process. Proceed with the distillation to extract 47.5 g of 2,4-difluorobenzaldehyde, yielding 66.9%. The analysis of 2,4-difluorobenzaldehyde by gas chromatography is ≥98.81%.

Physical Properties

Melting point	2-3 °C (lit.)
Boiling point	65-66 °C/17 mmHg (lit.)
Density	1.299 g/mL at 25 °C (lit.)
Molecular mass	142.1
Assay	≥98.0%
Flash point	131 °F
Package	50kgs or according customer requirement
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Physical and chemical properties

[Density]: 1.3±0.1 g/cm³

[Boiling point]: 168.6±0.0 ℃ at 760 mmHg

[Melting point]: 2-3 ℃ (lit.)

[Molecular formula]: C7H4F₂O

[Molecular weight]: 142.103

[Flash point]: 55.0±0.0 ℃

[Exact Mass]: 142.023026

[PSA]: 17.07000

[LogP]: 1.69

[Appearance]: Colorless to slightly yellow liquid

[Vapor pressure]: 1.6±0.3 mmHg at 25℃

[Refractive Index]: 1.514

[ Storage conditions ]:

Keep the container sealed and stored in a cool, dry place, and ensure there is good ventilation or exhaust in the workspace

Security Information

[Symbol]: GHS02, GHS07

[Signal word]: Warning

[Hazard Statement]: H226-H315-H319-H335

[Cautionary Statement]: P261-P305 + P351 + P338

[Personal Protective Equipment]: Eyeshields; Faceshields; full-face respirator (US); Gloves; multi-purpose combination respirator cartridge (US); type ABEK (EN14387) respirator filter

[Hazard Code (Europe)]: Xi:Irritant

[Risk Statement (Europe)]: R10; R36/37/38

[Safety Statement (Europe)]: S26-S36-S37/39-S16

[Dangerous Goods Transport Code]: UN 1989 3/PG 3

[WGK Germany]: 3

[Packaging level]: III

[Hazard Category]: 3

[HS Code]: 2913000090

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Packing, Storage, Handling and Transportation

Nonafluorobutanesulfonyl fluoride should be kept in dark place, sealed in dry and stored in freezer under -20℃

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