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HomeProduct name list3,5-Difluoropyridine

3,5-Difluoropyridine

  • CAS NO.:71902-33-5
  • Empirical Formula: C5H3F2N
  • Molecular Weight: 115.08
  • MDL number: MFCD03412222
  • EINECS: 624-636-9
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-04-23 13:52:06
3,5-Difluoropyridine Structural

What is 3,5-Difluoropyridine?

Chemical properties

Liquid

Preparation

Synthesis of 3,5-Difluoropyridine: A solution of 2,4,6-tribromo-3,5-difluoropyridine (11) (34.0 g, 97 mmol) in DCM (200 cm3) was washed with activated carbon and filtered. A palladium catalyst (3.4 g of a 5% Pd/C commercially available product) and triethylamine (45 cm3, 31.5 g, 312 mmol) were added to the filtrate and the mixture hydrogenated in a Parr apparatus at 4 Bar for 21 h. The mixture was filtered, water (200 cm3) added and extracted into DCM. Distillation of the DCM solution on Fischer-Spaltrohr apparatus gave 3,5-difluoropyridine (7.0 g, 61 mmol, 63%), b.p. 92.5 ·c (Found: C, 52.2; H, 3.0; N, 12.2. C5H3F2N2 requires C, 52.2; H, 3.0; N, 12.2%);
IR spectrum no. 1; mass spectrum no. 1; nrnr spectrum no. 8.

Properties of 3,5-Difluoropyridine

Boiling point: 92-93°C
Density  1.256 g/mL at 25 °C
refractive index  1.4437
Flash point: 9°C
storage temp.  under inert gas (nitrogen or Argon) at 2-8°C
form  clear liquid
pka 0.39±0.20(Predicted)
color  Colorless to Almost colorless
BRN  7914363
CAS DataBase Reference 71902-33-5(CAS DataBase Reference)

Safety information for 3,5-Difluoropyridine

Signal word Danger
Pictogram(s)
ghs
Flame
Flammables
GHS02
ghs
Exclamation Mark
Irritant
GHS07
ghs
Environment
GHS09
GHS Hazard Statements H225:Flammable liquids
H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
H400:Hazardous to the aquatic environment, acute hazard
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P273:Avoid release to the environment.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

Computed Descriptors for 3,5-Difluoropyridine

InChIKey WRXAZPPGFLETFR-UHFFFAOYSA-N

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