Sodium metabisulfite |
Synonyms & Trade Names Disodium pyrosulfite, Sodium metabisulphite, Sodium pyrosulfite |
CAS No. 7681-57-4 |
RTECS No. UX8225000 |
DOT ID & Guide |
FormulaNa2S2O5 |
Conversion |
IDLH N.D.
See: IDLH INDEX |
Exposure Limits NIOSH REL: TWA 5 mg/m3
OSHA PEL†: none |
Measurement Methods
NIOSH 0500
See: NMAM or OSHA Methods |
Physical Description White to yellowish crystals or powder with an odor of sulfur dioxide. |
MW: 190.1 |
BP: Decomposes |
MLT: >302°F (Decomposes) |
Sol: 54% |
VP: ? |
IP: NA |
Sp.Gr: 1.4 |
Fl.P: NA |
UEL: NA |
LEL: NA |
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| 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 contact |
Symptoms irritation eyes, skin, mucous membrane |
Target Organs Eyes, skin, respiratory system |
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Personal Protection/Sanitation (See protection codes)
Skin: No recommendation
Eyes: No recommendation
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation
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First Aid (See procedures)
Eye: Irrigate immediately
Breathing: Fresh air
Swallow: Medical attention immediately |
Respirator Recommendations Not available.
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 1461
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