HP Gas

High-Purity Chlorine (Chlorine)

Properties and Classification

Appearance: Yellow gas Odor: Irritating
CAS Number: 7782-50-5 UN Number: 1017
Liquefied gas Toxic

* Refer to MSDS for detailed information on the properties and safety of the product.


Purity vol% Min. 99.999
H2 volppm Max. 0.1
O2 volppm Max. 1.0
N2 volppm Max. 4.0
CH4 volppm Max. 0.1
CO volppm Max. 1.0
CO2 volppm Max. 2.0
H2O volppm Max. 2.0
Heavy metals
Na volppm Max. 10
Zn volppm Max. 20
Fe volppm Max. 100
Cu volppm Max. 10
Ni volppm Max. 10
Cd volppm Max. 5
Cr volppm Max. 1
P volppm Max. 5
High-Purity Chlorine (Chlorine)


Item 10L cylinder 47L cylinder
Size Inside diameter 140mm 232mm
Height (to the neck portion) 850mm 1370mm
Height (with a protective cap) * 1000mm 1520mm
Valve nozzle height (center) * 885mm 1400mm
Loading weight 10kg 50kg
Material Manganese steel (Clean-S-treated)

* Estimated values for when a standard valve is mounted on a standard cylinder. The accuracy of these values is not guaranteed.


Nozzle size Ø26 mm X 14 right-hand threads
Material SUS316 (Clean-S-treated)

Physical & Chemical Properties

Item Unit Data
Chemical formula Cl2
Molecular weight 70.91
Boiling point °C -34.05
Melting point °C -101
Liquid density (0°C, saturated liquid) kg/L
Sublimation point °C -34.1
°F -29.3
Specific gravity (-34°C) 1.558
Gas density g/L 3.214
Critical temperature °C 144
Critical pressure MPa 7.7
kg/cm2 78.6
Flammability Not applicable
Toxicity Toxic
Latent heat of vaporization (0°C, 1013MPa) kJ/kg 287.8
Maximum permissible concentration (ACGIH, TLV-TWA) ppm 0.5 (8 hours)
Explosive limit (in air, 35°C, 101.3kPa)

Temperature – Vapor Pressure Curve

High-Purity Chlorine (Chlorine)