| Formula / Notation | Cl2 |
|---|---|
| CAS Number | 7782-50-5 |
| Molecular Weight | 70.9 |
| Melting Point | -101.5 |
| Boiling Point | -34.1 |
| Density | 0.00321 |
| Solubility | 7.3 g/L at 20 C |
| Appearance | Yellow-green diatomic gas; liquid is amber-coloured |
| Also Known As | Cl2, chlorine gas |
| Category | Elements |
What is Chlorine?
Chlorine is a yellow-green diatomic halogen gas, atomic number 17, with pungent suffocating odour. Powerful oxidising agent and disinfectant. Used as chemical warfare agent in WWI. Most produced by electrolysis of brine.
Formula & Notation
IUPAC Name: Dichlorine
Other Names / Synonyms: Cl2, chlorine gas
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | -101.5 |
| Boiling Point | -34.1 |
| Density | 0.00321 |
| Molecular Weight | 70.9 |
| Solubility | 7.3 g/L at 20 C |
| Appearance | Yellow-green diatomic gas; liquid is amber-coloured |
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
Chlorine is a yellow-green diatomic halogen gas, atomic number 17, with pungent suffocating odour. Powerful oxidising agent and disinfectant. Used as chemical warfare agent in WWI. Most produced by electrolysis of brine.
Drinking water and pool disinfection. PVC plastic production. HCl production. Bleach (NaOCl). Pharmaceutical synthesis. Solvents (CHCl3, DCM). Pesticides. Paper bleaching.
Toxic gas: TLV-C 1 ppm, IDLH 10 ppm. Severe respiratory damage, eye/mucous membrane irritation, pulmonary oedema. Chemical warfare agent. Never mix bleach with ammonia (toxic chloramines). Requires SCBA at high concentrations.
The formula or notation for Chlorine is: Cl2