SODIUM META-BISULFITE, GRANULAR Page 1 of 8
SODIUM META-BISULFITE, GRANULAR
MSDS Number: S3098 --- Effective Date: 12/08/96
1. Product Identification
Synonyms: Sodium pyrosulfite; pyrosulfurous acid, disodium salt
CAS No.: 7681-57-4
Molecular Weight: 190.13
Chemical Formula: Na2S2O5
Product Codes: 3552
2. Composition/Information on Ingredients
Ingredient CAS No Percent Hazardous
--------------------------------------- ------------ ------- ---------
Sodium Metabisulfite 7681-57-4 99 - 100% Yes
Sodium Sulfite 7757-83-7 < 0.5% No
3. Hazards Identification
Emergency Overview
--------------------------
WARNING! HARMFUL IF SWALLOWED OR INHALED. CAUSES
IRRITATION TO SKIN, EYES AND RESPIRATORY TRACT. MAY CAUSE
ALLERGIC RESPIRATORY REACTION. REACTS WITH ACIDS AND
WATER RELEASING TOXIC SULFUR DIOXIDE GAS.
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J.T. Baker SAF-T-DATA(tm) Ratings (Provided here for your convenience)
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Health Rating: 1 - Slight
Flammability Rating: 0 - None
Reactivity Rating: 1 - Slight
Contact Rating: 1 - Slight
Lab Protective Equip: GOGGLES; LAB COAT
Storage Color Code: Orange (General Storage)
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Potential Health Effects
----------------------------------
Inhalation:
Causes irritation to the respiratory tract. Symptoms may include coughing, shortness of
breath. May cause allergic reaction in sensitive individuals.
Ingestion:
May cause gastric irritation by the liberation of sulfurous acid. An asthmatic reaction may
occur after ingestion. Large doses may result in nausea, vomiting, diarrhea, abdominal
pains, circulatory disturbance, and central nervous system depression. Estimated fatal
dose is 10 gm.
Skin Contact:
Causes irritation to skin. Symptoms include redness, itching, and pain.
Eye Contact:
Causes irritation, redness, and pain. Contact may cause irreversible eye damage.
Symptoms may include stinging, tearing, redness, swelling, corneal damage and blindness.
Chronic Exposure:
No information found.
Aggravation of Pre-existing Conditions:
Some individuals are said to be dangerously sensitive to minute amounts of sulfites in
foods. Symptoms may include broncho constriction, shock, gastrointestinal disturbances,
angio edema, flushing, and tingling sensations. Once allergy develops, future exposures
can cause asthma attacks with shortness of breath, wheezing, and cough.
4. First Aid Measures
Inhalation:
Remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult,
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give oxygen. Get medical attention.
Ingestion:
Induce vomiting immediately as directed by medical personnel. Never give anything by
mouth to an unconscious person. Get medical attention.
Skin Contact:
Wipe off excess material from skin then immediately flush skin with plenty of water for at
least 15 minutes. Remove contaminated clothing and shoes. Get medical attention. Wash
clothing before reuse. Thoroughly clean shoes before reuse.
Eye Contact:
Immediately flush eyes with plenty of water for at least 15 minutes, lifting lower and
upper eyelids occasionally. Get medical attention immediately.
5. Fire Fighting Measures
Fire:
Not considered to be a fire hazard.
Explosion:
Not considered to be an explosion hazard.
Fire Extinguishing Media:
Use any means suitable for extinguishing surrounding fire. Do not allow water runoff to
enter sewers or waterways.
Special Information:
In the event of a fire, wear full protective clothing and NIOSH-approved self-contained
breathing apparatus with full facepiece operated in the pressure demand or other positive
pressure mode.
6. Accidental Release Measures
Ventilate area of leak or spill. Wear appropriate personal protective equipment as
specified in Section 8. Spills: Pick up and place in a suitable container for reclamation or
disposal, using a method that does not generate dust. Cautiously spray residue with plenty
of water, providing ventilation to clear sulfur dioxide fumes generated from water
contact.
7. Handling and Storage
Keep in a tightly closed container. Protect from physical damage. Store in a cool, dry,
ventilated area away from sources of heat, moisture and incompatibilities. Releases toxic
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sulfur dioxide gas when in contact with water, ice. Keep away from acids, water, ice, and
oxidizing agents. Use only with appropriate protective equipment. Do not use in
unventilated areas such as holds of fishing boats, walk in coolers or confined spaces.
Containers of this material may be hazardous when empty since they retain product
residues (dust, solids); observe all warnings and precautions listed for the product.
8. Exposure Controls/Personal Protection
Airborne Exposure Limits:
-ACGIH Threshold Limit Value (TLV): 5mg/m3 (TWA) for sodium bisulfite & for
sodium metabisulfite, A4 Not classifiable as a human carcinogen.
Ventilation System:
A system of local and/or general exhaust is recommended to keep employee exposures
below the Airborne Exposure Limits. Local exhaust ventilation is generally preferred
because it can control the emissions of the contaminant at its source, preventing
dispersion of it into the general work area. Please refer to the ACGIH document,
Industrial Ventilation, A Manual of Recommended Practices, most recent edition, for
details.
Personal Respirators (NIOSH Approved):
If the exposure limit is exceeded, a half-face respirator with an acid gas cartridge may be
worn for up to ten times the exposure limit or the maximum use concentration specified
by the appropriate regulatory agency or respirator supplier, whichever is lowest. A full-
face piece respirator with an acid gas cartridge may be worn up to 50 times the exposure
limit, or the maximum use concentration specified by the appropriate regulatory agency,
or respirator supplier, whichever is lowest. For emergencies or instances where the
exposure levels are not known, use a full-facepiece positive-pressure, air-supplied
respirator. WARNING: Air-purifying respirators do not protect workers in oxygen-
deficient atmospheres.
Skin Protection:
Wear impervious protective clothing, including boots, gloves, lab coat, apron or
coveralls, as appropriate, to prevent skin contact. (neoprene, polyvinyl chloride).
Eye Protection:
Use chemical safety goggles and/or full face shield where dusting or splashing of solutions
is possible. Maintain eye wash fountain and quick-drench facilities in work area.
9. Physical and Chemical Properties
Appearance:
White to yellow white crystalline granules.
Odor:
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Slight odor of sulfur dioxide.
Solubility:
Very soluble in water, insoluble in alcohol.
Specific Gravity:
1.48
pH:
Aqueous solution is acidic.
% Volatiles by volume @ 21C (70F):
0
Boiling Point:
Not applicable.
Melting Point:
150C (302F)
Vapor Density (Air=1):
No information found.
Vapor Pressure (mm Hg):
No information found.
Evaporation Rate (BuAc=1):
No information found.
10. Stability and Reactivity
Stability:
Strength diminishes somewhat with age. Gradually decomposes in air to sulfate,
generating sulfurous acid gas. Contact with moisture (water, wet ice, etc.), will release
toxic sulfur dioxide gas.
Hazardous Decomposition Products:
Oxides of sulfur and sodium may form when heated to decomposition.
Hazardous Polymerization:
Will not occur.
Incompatibilities:
Water, acids, alkalis, sodium nitrite, oxidizers, aluminum powder.
Conditions to Avoid:
Moisture, heat, flames, ignition sources and incompatibles.
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11. Toxicological Information
Investigated as a tumorigen, mutagen, reproductive effector.
--------\Cancer Lists\------------------------------------------------------
---NTP Carcinogen---
Ingredient Known Anticipated IARC Category
------------------------------------ ----- ----------- -------------
Sodium Metabisulfite (7681-57-4) No No 3
Sodium Sulfite (7757-83-7) No No 3
12. Ecological Information
Environmental Fate:
No information found.
Environmental Toxicity:
No information found.
13. Disposal Considerations
Whatever cannot be saved for recovery or recycling should be managed in an appropriate
and approved waste disposal facility. Processing, use or contamination of this product
may change the waste management options. State and local disposal regulations may
differ from federal disposal regulations. Dispose of container and unused contents in
accordance with federal, state and local requirements.
14. Transport Information
Not regulated.
15. Regulatory Information
--------\Chemical Inventory Status - Part 1\---------------------------------
Ingredient TSCA EC Japan Australia
----------------------------------------------- ---- --- ----- ---------
Sodium Metabisulfite (7681-57-4) Yes Yes Yes Yes
Sodium Sulfite (7757-83-7) Yes Yes Yes Yes
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--------\Chemical Inventory Status - Part 2\---------------------------------
--Canada--
Ingredient Korea DSL NDSL Phil.
----------------------------------------------- ----- --- ---- -----
Sodium Metabisulfite (7681-57-4) Yes Yes No Yes
Sodium Sulfite (7757-83-7) Yes Yes No Yes
--------\Federal, State & International Regulations - Part 1\----------------
-SARA 302- ------SARA 313------
Ingredient RQ TPQ List Chemical Catg.
----------------------------------------- --- ----- ---- --------------
Sodium Metabisulfite (7681-57-4) No No No No
Sodium Sulfite (7757-83-7) No No No No
--------\Federal, State & International Regulations - Part 2\----------------
-RCRA- -TSCA-
Ingredient CERCLA 261.33 8(d)
----------------------------------------- ------ ------ ------
Sodium Metabisulfite (7681-57-4) No No Yes
Sodium Sulfite (7757-83-7) No No No
Chemical Weapons Convention: No TSCA 12(b): No CDTA: No
SARA 311/312: Acute: Yes Chronic: No Fire: No Pressure: No
Reactivity: Yes (Mixture / Solid)
Australian Hazchem Code: No information found.
Poison Schedule: No information found.
WHMIS:
This MSDS has been prepared according to the hazard criteria of the Controlled Products
Regulations (CPR) and the MSDS contains all of the information required by the CPR.
16. Other Information
NFPA Ratings: Health: 3 Flammability: 0 Reactivity: 1
Label Hazard Warning:
WARNING! HARMFUL IF SWALLOWED OR INHALED. CAUSES IRRITATION
TO SKIN, EYES AND RESPIRATORY TRACT. MAY CAUSE ALLERGIC
RESPIRATORY REACTION. REACTS WITH ACIDS AND WATER RELEASING
TOXIC SULFUR DIOXIDE GAS.
Label Precautions:
Avoid contact with eyes, skin and clothing. Avoid breathing dust. Keep container closed.
Use only with adequate ventilation. Wash thoroughly after handling. For Reagent and
Technical Grades: Not For Food Use.For TAC Grades: Do not use in meats or in foods
recognized as a source of Vitamin B-1, nor in fruits or vegetables to be served or sold
raw to consumers or to be presented to consumers as fresh.
Label First Aid:
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If swallowed, induce vomiting immediately as directed by medical personnel. Never give
anything by mouth to an unconscious person. If inhaled, remove to fresh air. If not
breathing, give artificial respiration. If breathing is difficult, give oxygen. In case of
contact, wipe off excess material from skin then immediately flush eyes or skin with
plenty of water for at least 15 minutes. Remove contaminated clothing and shoes. Wash
clothing before reuse. In all cases, get medical attention.
Product Use:
Laboratory Reagent.
Revision Information:
Mixture. New 16 section MSDS format, all sections have been revised.
Disclaimer:
***************************************************************************************
Mallinckrodt Baker, Inc. provides the information contained herein in good faith
but makes no representation as to its comprehensiveness or accuracy. This
document is intended only as a guide to the appropriate precautionary handling of
the material by a properly trained person using this product. Individuals receiving
the information must exercise their independent judgment in determining its
appropriateness for a particular purpose. MALLINCKRODT BAKER, INC.
MAKES NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR
IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE WITH
RESPECT TO THE INFORMATION SET FORTH HEREIN OR THE PRODUCT
TO WHICH THE INFORMATION REFERS. ACCORDINGLY,
MALLINCKRODT BAKER, INC. WILL NOT BE RESPONSIBLE FOR
DAMAGES RESULTING FROM USE OF OR RELIANCE UPON THIS
INFORMATION.
***************************************************************************************
Prepared by: Strategic Services Division
Phone Number: (314) 539-1600 (U.S.A.)
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