Sodium metabisulfite
Synonyms & Trade Names
Disodium pyrosulfite, Sodium metabisulphite, Sodium pyrosulfitePhysical Description
White to yellowish crystals or powder with an odor of sulfur dioxide.Molecular Weight
190.1Boiling Point
DecomposesMelting Point
>302°F (Decomposes)Solubility
54%Vapor Pressure
?Ionization Potential
NASpecific Gravity
1.4Flash Point
NAUpper Exposive Limit
NALower Explosive Limit
NA
Noncombustible Solid
Incompatibilities & Reactivities
Heat (decomposes) [Note: Slowly oxidized to the sulfate on exposure to air & moisture.]Exposure Routes
inhalation, ingestion, skin and/or eye contactSymptoms
irritation eyes, skin, mucous membraneTarget Organs
Eyes, skin, respiratory systemPersonal Protection/Sanitation
(See protection codes)Skin:No recommendation
Eyes:No recommendation
Wash skin:No recommendation
Remove:No recommendation
Change:No recommendation
First Aid
(See procedures)Eye:Irrigate immediately
Breathing:Fresh air
Swallow:Medical attention immediately
Respirator Recommendations
Not available.
- Page last reviewed:April 11, 2016
- Page last updated:April 11, 2016
- Content source:
- National Institute for Occupational Safety and Health (NIOSH) Education and Information Division