SODIUM THIOSULFATE
MSDS Number: S5230 --- Effective Date: 11/17/99
1. Product Identification
Synonyms: Sodium thiosulfate, pentahydrate; thiosulfuric
acid, disodium salt, pentahydrate
CAS No.: 7772-98-7 (Anhydrous)
Molecular Weight: 248.17
Chemical Formula: Na2S2O3.5H2O
Product Codes:
J.T. Baker: 3946
Mallinckrodt: 7763, 7802,
8100
2. Composition/Information on Ingredients
Ingredient CAS No Percent Hazardous
--------------------------------------- ------------ ------- ---------
Sodium Thiosulfate 7772-98-7 100% Yes
3. Hazards Identification
Emergency Overview
--------------------------
CAUTION! MAY BE HARMFUL IF SWALLOWED OR INHALED. MAY CAUSE IRRITATION
TO SKIN, EYES, AND RESPIRATORY TRACT.
J.T. Baker
SAF-T-DATA(tm) Ratings (Provided here for your convenience)
-----------------------------------------------------------------------------------------------------------
Health Rating: 0 - None
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:
May cause irritation to the respiratory tract.
Symptoms may include coughing and shortness of breath.
Ingestion:
Low level of toxicity by ingestion. Diarrhea may occur by ingestion of
large quantities.
Skin Contact:
Irritation may occur from
prolonged skin contact.
Eye Contact:
Contact may cause
mechanical irritation.
Chronic Exposure:
Chronic exposure may
cause skin effects.
Aggravation of Pre-existing Conditions:
No
information found.
4. First Aid Measures
Inhalation:
Remove to fresh air. Get medical attention
for any breathing difficulty.
Ingestion:
Induce vomiting
immediately as directed by medical personnel. Never give anything by mouth to
an unconscious person. Get medical attention.
Skin Contact:
Wash exposed area with soap and water. Get medical advice if irritation
develops.
Eye Contact:
Wash thoroughly with running water. Get
medical advice if irritation develops.
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.
Special Information:
Use
protective clothing and breathing equipment appropriate for the surrounding
fire.
6. Accidental Release Measures
Ventilate area of leak or spill. Wear appropriate personal
protective equipment as specified in Section 8. Spills: Sweep up and
containerize for reclamation or disposal. Vacuuming or wet sweeping may be
used to avoid dust dispersal.
7. Handling and Storage
Keep in a tightly closed container, stored in a cool, dry,
ventilated area. Protect against physical damage. Isolate from incompatible
substances. 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:
None established.
Ventilation System:
In general, dilution ventilation is a
satisfactory health hazard control for this substance. However, if conditions
of use create discomfort to the worker, a local exhaust system should be
considered.
Personal Respirators (NIOSH Approved):
For
conditions of use where exposure to the dust or mist is apparent, a half-face
dust/mist respirator may be worn. For emergencies or instances where the
exposure levels are not known, use a full-face positive-pressure, air-supplied
respirator. WARNING: Air-purifying respirators do not protect workers in
oxygen-deficient atmospheres.
Skin Protection:
Wear protective
gloves and clean body-covering clothing.
Eye Protection:
Safety
glasses. Maintain eye wash fountain and quick-drench facilities in work area.
9. Physical and Chemical Properties
Appearance:
Monoclinic, colorless crystals.
Odor:
Odorless.
Solubility:
79g/100 ml water @
4C (39F)
Density:
1.75
pH:
No information found.
% Volatiles by volume @ 21C (70F):
0
Boiling Point:
> 100C (> 212F)
Melting Point:
48C (118F) Loses water
@ 100C (212F)
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:
Stable under ordinary conditions of use and
storage. Stability limited in solution.
Hazardous Decomposition
Products:
Oxides of sulfur and hydrogen sulfide.
Hazardous
Polymerization:
Will not occur.
Incompatibilities:
Sodium nitrate, halogens, and oxidizing agents. Reacts with acids to
release sulfur dioxide.
Conditions to Avoid:
Incompatibles.
11. Toxicological Information
No LD50/LC50 information found relating to normal routes of
occupational exposure.
--------\Cancer Lists\------------------------------------------------------
---NTP Carcinogen---
Ingredient Known Anticipated IARC Category
------------------------------------ ----- ----------- -------------
Sodium Thiosulfate (7772-98-7) No No None
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 Thiosulfate (7772-98-7) Yes Yes Yes Yes
--------\Chemical Inventory Status - Part 2\---------------------------------
--Canada--
Ingredient Korea DSL NDSL Phil.
----------------------------------------------- ----- --- ---- -----
Sodium Thiosulfate (7772-98-7) Yes Yes No Yes
--------\Federal, State & International Regulations - Part 1\----------------
-SARA 302- ------SARA 313------
Ingredient RQ TPQ List Chemical Catg.
----------------------------------------- --- ----- ---- --------------
Sodium Thiosulfate (7772-98-7) No No No No
--------\Federal, State & International Regulations - Part 2\----------------
-RCRA- -TSCA-
Ingredient CERCLA 261.33 8(d)
----------------------------------------- ------ ------ ------
Sodium Thiosulfate (7772-98-7) 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: No (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: 1 Flammability: 0
Reactivity: 0
Label Hazard Warning:
CAUTION! MAY BE
HARMFUL IF SWALLOWED OR INHALED. MAY CAUSE IRRITATION TO SKIN, EYES, AND
RESPIRATORY TRACT.
Label Precautions:
Avoid contact with eyes,
skin and clothing.
Wash thoroughly after handling.
Avoid breathing
dust.
Keep container closed.
Use with adequate ventilation.
Label
First Aid:
If inhaled, remove to fresh air. Get medical attention for
any breathing difficulty. In case of contact, immediately flush eyes or skin
with plenty of water for at least 15 minutes. Get medical attention if
irritation develops or persists. If swallowed, induce vomiting immediately as
directed by medical personnel. Never give anything by mouth to an unconscious
person.
Product Use:
Laboratory Reagent.
Revision
Information:
No changes.
Disclaimer:
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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.
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Prepared by: Strategic Services Division
Phone Number: (314)
539-1600 (U.S.A.)