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| Sodium metabisulfite | CAS 7681-57-4 | ||
| Na2S2O5 | RTECS UX8225000 | ||
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Synonyms & Trade Names Disodium pyrosulfite, Sodium metabisulphite, Sodium pyrosulfite |
DOT ID & Guide |
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Exposure Limits |
NIOSH REL: TWA 5 mg/m3 | ||
| OSHA PEL†: none | |||
| IDLH N.D. See: IDLH INDEX | Conversion | ||
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Physical Description White to yellowish crystals or powder with an odor of sulfur dioxide. |
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MW: 190.1 |
BP: Decomposes |
MLT: >302°F (Decomposes) |
Sol: 54% |
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VP: ? |
IP: NA |
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Sp.Gr: 1.4 |
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Fl.P: NA |
UEL: NA |
LEL: NA |
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| Noncombustible Solid | |||
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Incompatibilities & Reactivities Heat (decomposes) [Note: Slowly oxidized to the sulfate on exposure to air & moisture.] |
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Measurement Method Filter; none; Gravimetric; IV [#0500, Particulates NOR (total)] See: NMAM INDEX |
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Personal Protection & Sanitation Skin: N.R. Eyes: N.R. Wash skin: N.R. Remove: N.R. Change: N.R. |
First Aid (See procedures) Eye: Irrigate immediately Breathing: Fresh air Swallow: Medical attention immediately |
| Respirator Recommendations To be added later | |
| Exposure Routes inhalation, ingestion, skin and/or eye contact | |
| Symptoms irritation eyes, skin, mucous membrane | |
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Target Organs
Eyes, skin, respiratory system |
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| See also: INTRODUCTION |