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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
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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 Methods NIOSH 0500 See: NMAM or OSHA Methods |
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Personal Protection & Sanitation (See protection) 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 |
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Important additional information about respirator selection Respirator Recommendations Not available. |
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| 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 |