__________________________________________________________________________________________
24 hour Emergency Telephone:
Chemtrec: 1-800-424-9300
Outside U.S. and Canada Chemtrec: 202-483-7616
MSDS Material Safety Data Sheet
NOTE: CHEMTREC and National Response
Center emergency numbers to be used only in
the event of chemical emergencies involving a
From: Vinquiry, Inc. spill, leak, fire, exposure or accident involving
7795 Bell Road
chemicals.
Windsor, CA 95492
All Non-emergency questions should be directed to Customer Service (1-707-838-6312) for assistance.
SODIUM THIOSULFATE 0.01 TO 1.0 NORMAL VOLUMETRIC
SOLUTIONS
MSDS Number: ST239 --- Effective Date: 01/01/01
1. Product Identification
Synonyms: Sodium thiosulfate 0.01 to 1.0 Normal volumetric solutions
CAS No.: 7772-98-7
Molecular Weight: 158.11
Chemical Formula: Na2S2O3 in aqueous solution
Vinquiry Inc. Product Codes: 10-239-0000, 10-239-0118, 10-239-0237, 10-239-0473, 10-239-0946,
10-240-0000, 10-240-0118, 10-240-0237, 10-240-0473, 10-240-0946
2. Composition/Information on Ingredients
Ingredient CAS No Percent Hazardous
--------------------------------------- ------------ ------- ---------
Sodium Thiosulfate 7772-98-7 0.02 - 25 Yes
Water 7732-18-5 75 - 99% No
3. Hazards Identification
Emergency Overview
--------------------------
CAUTION! MAY BE HARMFUL IF SWALLOWED OR INHALED. MAY CAUSE
IRRITATION TO SKIN, EYES, AND RESPIRATORY TRACT.
VINQUIRY INC. SAFETY DATA Ratings (Provided here for your convenience)
-----------------------------------------------------------------------------------------------------------
Health Rating: 0 - None
Flammability Rating: 0 - None
Reactivity Rating: 0 - None
Contact Rating: 1 - Slight
Lab Protective Equip: GOGGLES; LAB COAT
Storage Color Code: Orange (General Storage)
-----------------------------------------------------------------------------------------------------------
Potential Health Effects
----------------------------------
Inhalation:
May cause mild irritation to the respiratory tract.
Ingestion:
May cause mild irritation to the gastrointestinal tract.
Skin Contact:
May cause mild irritation and redness.
Eye Contact:
May cause mild irritation, possible reddening.
Chronic Exposure:
Chronic exposure may cause skin effects.
Aggravation of Pre-existing Conditions:
No information found.
4. First Aid Measures
Inhalation:
Not expected to require first aid measures.
Ingestion:
Give several glasses of water to drink to dilute. If large amounts were swallowed, get medical advice.
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.
Contain and recover liquid when possible. Collect liquid in an appropriate container or absorb with an
inert material (e. g., vermiculite, dry sand, earth), and place in a chemical waste container. Do not use
combustible materials, such as saw dust.
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 (vapors, liquid); observe all warnings and precautions listed for the product.
8. Exposure Controls/Personal Protection
Airborne Exposure Limits:
None established.
Ventilation System:
Not expected to require any special ventilation.
Personal Respirators (NIOSH Approved):
Not expected to require personal respirator usage.
Skin Protection:
Wear protective gloves and clean body-covering clothing.
Eye Protection:
Use chemical safety goggles. Maintain eye wash fountain and quick-drench facilities in work area.
9. Physical and Chemical Properties
Appearance:
Clear, colorless solution.
Odor:
Odorless.
Solubility:
Infinitely miscible.
Specific Gravity:
ca. 1.01-1.14
pH:
Aqueous solution is neutral.
% Volatiles by volume @ 21C (70F):
> 60
Boiling Point:
ca. 100C (ca. 212F)
Melting Point:
ca. 0C (ca. 32F)
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.
Hazardous Decomposition Products:
Burning may produce sulfur oxides.
Hazardous Polymerization:
Will not occur.
Incompatibilities:
Metal nitrates, sodium nitrite, iodine, acids, lead, mercury, and silver salts.
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
Water (7732-18-5) No No None
12. Ecological Information
Environmental Fate:
No information found.
Environmental Toxicity:
No information found.
13. Disposal Considerations
Dilute with water and flush to sewer if local ordinances allow, otherwise, 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
Water (7732-18-5) Yes Yes Yes Yes
--------\Chemical Inventory Status - Part 2\---------------------------------
--Canada--
Ingredient Korea DSL NDSL Phil.
----------------------------------------------- ----- --- ---- -----
Sodium Thiosulfate (7772-98-7) Yes Yes No Yes
Water (7732-18-5) 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
Water (7732-18-5) 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
Water (7732-18-5) No No No
Chemical Weapons Convention: No TSCA 12(b): No CDTA: No
SARA 311/312: Acute: Yes Chronic: Yes Fire: No Pressure: No
Reactivity: No (Mixture / Liquid)
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 mist.
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:
Disclaimer
Vinquiry Inc. provides this information in good faith but makes no representation as to its comprehensiveness
or accuracy. This document is intended only as a guide to laboratory use of this material by a properly trained
person. Individuals receiving this information must exercise their independent judgment in determining its
appropriateness for a particular purpose. Vinquiry Inc. will not be responsible for damages resulting from use
or reliance upon this information.
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