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Arsine

Also known as: ARSINE · arsane · Arsenic trihydride · Arsenwasserstoff

CAS No.: 7784-42-1
Formula: AsH3
Molar mass: 77.946 g/mol
PubChem CID: 23969

GHS pictograms

Flammable

Compressed gas

Toxic

Health hazard

Environmental hazard

2D structure of Arsine — 2D structure · PubChem CID 23969

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

Arsine (AsH3), CAS 7784-42-1. Common in labs and industry. Read on for hazards, storage, PPE and mixing rules.

Background

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Physical properties

Boiling point°C

-62.4

-80.4 °F at 760 mmHg (EPA, 1998)

Melting point°C

-117.2

-179 °F (EPA, 1998)

Flash point°C

—

Densityg/mL

—

Vapor pressuremmHg

—

Vapor density(air = 1)

2.66

2.66 to 2.695 (EPA, 1998) (Relative to Air)

Water solubility

—

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

Hazards

Flammable (GHS02)

Ignites easily when exposed to a flame or spark.

Compressed gas (GHS04)

Contents under pressure, may explode if heated.

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

Flammable. Keep away from open flames, hot surfaces and sparks. Ground containers when transferring.
Compressed gas. Secure cylinders upright, protect valves, store in ventilated areas.
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 Arsine flammable?+

Yes. Arsine (CAS 7784-42-1) carries the GHS02 flame pictogram. Keep it away from ignition sources, use non-sparking tools, and ground metal containers when transferring liquid.

What PPE should I wear when handling Arsine?+

Safety glasses with side shields and nitrile gloves are the baseline. Work inside a fume hood or use a suitable respirator. Check SDS section 8 for material-specific breakthrough times.

How should Arsine be stored?+

Store Arsine (CAS 7784-42-1) in tightly closed original containers, in a cool, dry, well-ventilated area away from incompatible materials. Use a flammable-liquid cabinet and keep away from oxidizers and heat.

Is Arsine dangerous for the environment?+

Yes. Arsine 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 Arsine?+

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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