Fluorine
| Formula / Notation | F₂ |
|---|---|
| CAS Number | 7782-41-4 |
| Molecular Weight | 38.00 g/mol |
| Melting Point | −219.67°C (53.48 K) |
| Boiling Point | −188.11°C (85.04 K) |
| Density | 1.696 g/L at STP |
| Appearance | Pale yellow-green diatomic gas with a pungent, sharp odor |
| Also Known As | Fluorine gas, Difluorine |
What is Fluorine?
The most electronegative element, with atomic number 9 and symbol F. It is a pale yellow, highly reactive diatomic gas (F₂) and the lightest halogen. Fluorine forms compounds with almost all elements. It is used in refrigerants, non-stick coatings (PTFE), and toothpaste.
Formula & Notation
Other Names / Synonyms: Fluorine gas, Difluorine
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | −219.67°C (53.48 K) |
| Boiling Point | −188.11°C (85.04 K) |
| Density | 1.696 g/L at STP |
| Molecular Weight | 38.00 g/mol |
| Appearance | Pale yellow-green diatomic gas with a pungent, sharp odor |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
The most electronegative element, with atomic number 9 and symbol F. It is a pale yellow, highly reactive diatomic gas (F₂) and the lightest halogen. Fluorine forms compounds with almost all elements. It is used in refrigerants, non-stick coatings (PTFE), and toothpaste.
Production of uranium hexafluoride (UF₆) for uranium isotope enrichment in nuclear fuel. Manufacture of fluoropolymers: PTFE (Teflon), PVDF. Etching silicon and glass in semiconductor manufacturing. Refrigerants (CFCs, HFCs, HFOs). Toothpaste and water fluoridation (as NaF or fluorosilicates). Antir…
EXTREMELY HAZARDOUS. Fluorine gas is violently toxic — PEL = 0.1 ppm, IDLH = 25 ppm. Contact with skin causes deep chemical burns (hydrofluoric acid burns are especially dangerous — calcium gluconate antidote required). Reacts explosively with organic materials, water, and most metals. Requires spec…
The formula or notation for Fluorine is: F₂