Magnesium oxide

CAS 1309-48-4 MgO MW 40.3000 Warning
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Emergency: 911 | Poison Control: 1-800-222-1222

Hazard Statements

CodeStatementHazard Class
H319 Causes serious eye irritation Serious eye damage/eye irritation
H335 May cause respiratory irritation Specific target organ toxicity, single exposure; Respiratory tract irritation

Precautionary Statements

CodeStatement
P261 Avoid breathing dust/fume/gas/mist/vapors/spray.
P264+P265 Wash hands [and ...] thoroughly after handling. Do not touch eyes.
P271 Use only outdoors or in a well-ventilated area.
P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...
P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do - continue rinsing.
P319 Get medical help if you feel unwell.
P337+P317 If eye irritation persists: Get medical help.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.
P405 Store locked up.
P501 Dispose of contents/container to ...

Exposure Limits

OSHA PEL15 mg-m3
NIOSH IDLH750 mg-m3
Skin NotationYes — can be absorbed through skin

Physical Properties

A white solid, often found as a powder.

Boiling Point6512°F
Vapor Pressure0 mmHg (approx)
Specific Gravity3.58

Synonyms

magnesia fume; maglite; magox

Data Sources

Disclaimer: This information is compiled from public regulatory databases for reference only. It does not replace the manufacturer's Safety Data Sheet (SDS). Always consult the official SDS for your specific product before handling chemicals.

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