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Chlorine trifluoride

Also known as: CHLORINE TRIFLUORIDE · Chlorotrifluoride · 7790-91-2 · trifluorochlorine

CAS No.: 7790-91-2
Formula: ClF3
Molar mass: 92.45 g/mol
PubChem CID: 24637

GHS pictograms

Oxidizing

Compressed gas

Corrosive

Toxic

Health hazard

Environmental hazard

2D structure of Chlorine trifluoride — 2D structure · PubChem CID 24637

New to Safety Data Sheets? What is an SDS · SDS vs MSDS · The 16 sections explained · Read an SDS in 5 min · Compatibility chart

Summary

Chlorine trifluoride (ClF3), CAS 7790-91-2. Common in labs and industry. Read on for hazards, storage, PPE and mixing rules.

Background

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Physical properties

Boiling point°C

11.7

53 °F at 760 mmHg (USCG, 1999)

Melting point°C

-76.1

-105 °F (USCG, 1999)

Densityg/mL

—

Vapor pressuremmHg

—

Vapor density(air = 1)

3.21

3.21 (NIOSH, 2024) - Heavier than air; will sink (Relative to Air)

Water solubility

—

Sourced from PubChem Experimental Properties. Values may vary between sources and conditions.

Hazards

Oxidizing (GHS03)

May cause or intensify fire.

Compressed gas (GHS04)

Contents under pressure, may explode if heated.

Corrosive (GHS05)

Attacks skin, eyes and materials.

Toxic (GHS06)

May be fatal even in small doses.

Health hazard (GHS08)

Serious long-term health effects (CMR, respiratory sensitizer).

Environmental hazard (GHS09)

Toxic to aquatic organisms.

Hazard statements

Storage

Temperature

Keep at room temperature, below 30 °C, out of direct heat.

Ventilation

Store somewhere well-ventilated and away from any ignition source.

Containers

Metal drums or tinted glass, tightly sealed.

Keep away from

Strong acids, strong bases and powerful oxidizers.

Personal protective equipment

Gloves

Nitrile or butyl, at least 0.4 mm thick.

Eye protection

Safety goggles with side shields.

Respirator

A2 organic-vapor cartridge if the room isn't well ventilated.

Occupational exposure limits (HSE)

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EU harmonised classification (ECHA C&L)

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Transport

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FDA recalls & enforcement

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Compatibilities

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Practical safety notes

Oxidizing. Keep away from combustibles, organics, reducers and fuels.
Compressed gas. Secure cylinders upright, protect valves, store in ventilated areas.
Corrosive. Wear chemical goggles, faceshield and chemical-resistant gloves. Have an eyewash within reach.
Acute toxicity. Work under a fume hood, restrict access, keep a specific antidote plan available.
Serious health hazard (carcinogen, mutagen, reprotoxic, respiratory sensitizer). Substitute if possible; otherwise closed systems and medical surveillance.
Environmental hazard. Do not release to sewers or waterways; collect for hazardous waste disposal.

Derived from the GHS classification shown above. These notes are generic guidance and do not replace the manufacturer's SDS or your local risk assessment.

FAQ

Is Chlorine trifluoride flammable?+

Chlorine trifluoride (CAS 7790-91-2) does not carry the GHS02 flame pictogram in our records. Always confirm with the manufacturer's SDS section 9 (flash point) before assuming a product is non-flammable.

What PPE should I wear when handling Chlorine trifluoride?+

Chemical-splash goggles and a faceshield, chemical-resistant gloves (nitrile or butyl) and an apron are the minimum. Work inside a fume hood or use a suitable respirator. Check SDS section 8 for material-specific breakthrough times.

How should Chlorine trifluoride be stored?+

Store Chlorine trifluoride (CAS 7790-91-2) in tightly closed original containers, in a cool, dry, well-ventilated area away from incompatible materials. Segregate acids from bases and keep away from metals that can be attacked.

Is Chlorine trifluoride dangerous for the environment?+

Yes. Chlorine trifluoride carries the GHS09 environment pictogram. Do not release to drains, soil or waterways; collect residues for hazardous-waste disposal in line with local regulations.

Where can I find the official Safety Data Sheet for Chlorine trifluoride?+

Official, up-to-date SDS documents are published by each manufacturer (Sigma-Aldrich, Merck, Thermo Fisher, VWR, Carl Roth, etc.) and by regulators such as ECHA and NIOSH. This page is an educational summary and does not replace the manufacturer's SDS.

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