Material Safety Data Sheet
Ammonium Thiosulfate Solution
1. PRODUCT AND COMPANY IDENTIFICATION
Ammonium Thiosulfate Solution
PRODUCT NAME:
Ammonium thiosulfate, aqueous solution
OTHER/GENERIC NAMES:
Ammonium hyposulfite solution
Industrial
PRODUCT USE:
Esseco General Chemical
MANUFACTURER:
90 East Halsey Road
Parsippany, NJ 07054
USA
973-515-1840 800-631-8050
FOR MORE INFORMATION CALL: IN CASE OF EMERGENCY CALL:
(24 Hours/Day, 7 Days/Week)
(Monday-Friday, 9:00am-4:30pm)
2. COMPOSITION/INFORMATION ON INGREDIENTS
INGREDIENT NAME CAS NUMBER WEIGHT %
Ammonium thiosulfate 7783-18-8 58
Water 7732-18-5 Balance
Trace impurities and additional material names not listed above may appear in Section 15 of this MSDS. These
materials may be listed for local "Right-To-Know" compliance and for other reasons.
This product is considered hazardous under the OSHA Hazard
OSHA Hazard Communication Standard:
Communication Standard.
3. HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW: Clear, colorless liquid with an ammonia odor which may irritate
the skin, respiratory tract and gastrointestinal tract. May cause irritation and/or burns to the
eyes. Reacts with acids to form toxic and irritating sulfur dioxide gas. Not flammable.
POTENTIAL HEALTH HAZARDS
Irritation is possible from prolonged or repeated contact.
SKIN:
Irritation or burning is possible from contact with liquid. Mist may cause irritation or burning.
EYES:
Inhalation of mist may irritate respiratory tract. If heated to the point where ammonia gas is
INHALATION:
driven off, this is highly irritating to the respiratory tract.
May irritate the gastrointestinal tract. Generally considered of low toxicity, poorly absorbed
INGESTION:
from the bowel.
MSDS Number: EGC-0001 Page 1 of 6
Current Issue Date: April, 2003
MATERIAL SAFETY DATA SHEET
Ammonium Thiosulfate Solution
DELAYED EFFECTS: None known.
Ingredients found on one of the three OSHA designated carcinogen lists are listed below.
INGREDIENT NAME NTP STATUS IARC STATUS OSHA LIST
No ingredients listed in this section.
4. FIRST AID MEASURES
Wash skin with plenty of water. Get medical attention if irritation persists.
SKIN:
Flush eyes immediately with water for at least 15 minutes. Get medical attention.
EYES:
Promptly remove to fresh air. If breathing is difficult, give oxygen, provided a qualified operator is
INHALATION:
available. If symptoms persist, get medical attention.
If conscious, immediately give 2 to 4 glasses of water and induce vomiting by touching finger to
INGESTION:
back of throat. Get medical attention.
Treat symptomatically.
ADVICE TO PHYSICIAN:
5. FIRE FIGHTING MEASURES
FLAMMABLE PROPERTIES
Not flammable
FLASH POINT:
Not applicable
FLASH POINT METHOD:
Not applicable
AUTOIGNITION TEMPERATURE:
Not applicable
UPPER FLAME LIMIT (volume % in air):
Not applicable
LOWER FLAME LIMIT (volume % in air):
Not applicable
FLAME PROPAGATION RATE (solids):
Not applicable
OSHA FLAMMABILITY CLASS:
EXTINGUISHING MEDIA:
Material is not flammable. Use water or extinguishing media appropriate for material in surrounding fire.
UNUSUAL FIRE AND EXPLOSION HAZARDS:
Ammonia gas is evolved on heating. If heated beyond dryness, some hydrogen sulfide gas may be given off. The
flammable limits for ammonia in air are 16% to 25% by volume. Hydrogen sulfide will also burn.
SPECIAL FIRE FIGHTING PRECAUTIONS/INSTRUCTIONS:
Wear NIOSH-approved self-contained breathing apparatus to protect against any release of toxic and/or irritating
fumes. Skin and eye protection should also be provided. Use water-spray to keep fire-exposed containers cool,
and to knock down fumes.
6. ACCIDENTAL RELEASE MEASURES
IN CASE OF SPILL OR OTHER RELEASE: (See section 8 for recommended personal protective equipment.)
Dilute small spills or leaks cautiously with plenty of water, keeping away from incompatible materials. Dike up
large spills with commercial or other convenient absorbent. Mop or pump into metal or plastic containers. Close
containers and store for later disposal.
MSDS Number: EGC-0001 Page 2 of 6
Current Issue Date: April, 2003
MATERIAL SAFETY DATA SHEET
Ammonium Thiosulfate Solution
Spills and releases may have to be reported to Federal and/or local authorities. See Section 15 regarding
reporting requirements.
7. HANDLING AND STORAGE
NORMAL HANDLING: (See section 8 for recommended personal protective equipment.)
Avoid contact with skin, eyes and clothing. Use good personal hygiene and housekeeping. Wash thoroughly after
handling.
STORAGE RECOMMENDATIONS:
Store in a cool, well-ventilated area away from acids, alkalies and oxidizers. Keep containers out of the sun. Keep
container closed with opening up to prevent leakage when not in use and protect from physical damage. Diking of
storage tanks is recommended.
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
ENGINEERING CONTROLS:
Provide local exhaust if misty conditions exist.
PERSONAL PROTECTIVE EQUIPMENT
For routine product handling or use, wear full work clothing, including long-sleeved
SKIN PROTECTION:
shirt and trousers. Wear rubber gloves and apron for prolonged or repeated contact
with liquid.
Wear chemical safety goggles and hard hat (or other head covering). Do not wear
EYE PROTECTION:
contact lenses.
None generally required. If misty conditions exist, use a NIOSH-approved respirator
RESPIRATORY
for mist. If through heating, excessive ammonia gas is given off, use a chemical
PROTECTION:
cartridge respirator with a cartridge specific for ammonia, or a NIOSH-approved
self-contained breathing apparatus or supplied-air respirator. The TLV for ammonia
is 25 ppm.
Eyewash and safety shower is recommended.
ADDITIONAL
RECOMMENDATIONS:
EXPOSURE GUIDELINES
INGREDIENT NAME ACGIH TLV OSHA PEL OTHER LIMIT
No ingredients listed in this section.
1
= Limit established by General Chemical Corporation.
2
= Workplace Environmental Exposure Level (AIHA).
3
= Biological Exposure Index (ACGIH).
OTHER EXPOSURE LIMITS FOR POTENTIAL DECOMPOSITION PRODUCTS:
Ammonia: OSHA TWA = 50 ppm; ACGIH TLV = 25 ppm; ACGIH STEL = 35 ppm
MSDS Number: EGC-0001 Page 3 of 6
Current Issue Date: April, 2003
MATERIAL SAFETY DATA SHEET
Ammonium Thiosulfate Solution
9. PHYSICAL AND CHEMICAL PROPERTIES
Clear, colorless liquid.
APPEARANCE:
Liquid.
PHYSICAL STATE:
148.20 (anhydrous)
MOLECULAR WEIGHT:
(NH4)2S2O3 + H2O (solution)
CHEMICAL FORMULA:
Ammonia odor
ODOR:
1.33 (anhydrous)
SPECIFIC GRAVITY (water = 1.0):
Complete
SOLUBILITY IN WATER (weight %):
Approx. 8
pH:
>100C (boils with decomposition)
BOILING POINT:
Salt-out temperature is 3C
MELTING POINT:
Not applicable.
VAPOR PRESSURE:
Not applicable.
VAPOR DENSITY (air = 1.0):
Not applicable.
EVAPORATION RATE: COMPARED TO: Not applicable
Not applicable.
% VOLATILES:
Not flammable.
FLASH POINT:
(Flash point method and additional flammability data are found in Section 5.)
10. STABILITY AND REACTIVITY
NORMALLY STABLE? (CONDITIONS TO AVOID):
Normally stable. Avoid - Heat: accelerates the normal evolution of ammonia. Heating to dryness and further:
yields toxic hydrogen sulfide and other gases. Hydrogen sulfide also can burn.
INCOMPATIBILITIES:
Strong oxidizers such as nitrates and nitrites: can cause explosions, particularly if heated to dryness.
Water-reactive materials such as oleum: causes strong exothermic reaction.
Acids: causes evolution of sulfur dioxide gas, which is toxic, corrosive, and an oxidizer.
Alkalies: accelerates the normal evolution of ammonia.
HAZARDOUS DECOMPOSITION PRODUCTS:
Ammonia under normal and heated conditions. Ammonia is toxic, corrosive and chemically reactive. Overheating
of the evaporation residue yields ammonia, hydrogen sulfide, nitrogen oxide gases and sulfur oxide gases. These
are toxic and corrosive. Ammonia and hydrogen sulfide can burn. The oxides are also oxidizers.
HAZARDOUS POLYMERIZATION:
Will not occur.
11. TOXICOLOGICAL INFORMATION
IMMEDIATE (ACUTE) EFFECTS:
LD50 (oral-rat): 2890 mg/kg
LC50 (inhl-rat): >2260 mg/m3/4 hr
DELAYED (SUBCHRONIC AND CHRONIC) EFFECTS:
Data not available.
OTHER DATA:
None.
MSDS Number: EGC-0001 Page 4 of 6
Current Issue Date: April, 2003
MATERIAL SAFETY DATA SHEET
Ammonium Thiosulfate Solution
12. ECOLOGICAL INFORMATION
Effect of low concentrations on aquatic life is unknown.
BOD: 0.62 lb/lb, 5 days
13. DISPOSAL CONSIDERATIONS
RCRA
Is the unused product a RCRA hazardous If yes, the RCRA ID number is: Not applicable.
waste if discarded? No.
OTHER DISPOSAL CONSIDERATIONS:
Dispose of in accordance with applicable Federal, State and Local regulations.
The information offered in section 13 is for the product as shipped. Use and/or alterations to the product such as
mixing with other materials may significantly change the characteristics of the material and alter the RCRA
classification and the proper disposal method.
14. TRANSPORT INFORMATION
Not regulated.
US DOT HAZARD CLASS:
Not applicable.
US DOT ID NUMBER:
Not applicable.
PROPER SHIPPING NAME:
For additional information on shipping regulations affecting this material, contact the information number found in
Section 1.
15. REGULATORY INFORMATION
TOXIC SUBSTANCES CONTROL ACT (TSCA)
Listed on TSCA Inventory of Chemical Substances.
TSCA INVENTORY STATUS:
OTHER TSCA ISSUES: None.
SARA TITLE III/CERCLA
"Reportable Quantities" (RQs) and/or "Threshold Planning Quantities" (TPQs) exist for the following ingredients.
INGREDIENT NAME SARA/CERCLA RQ (lb) SARA EHS TPQ (lb)
No ingredients listed in this section.
Spills or releases resulting in the loss of any ingredient at or above its RQ requires immediate notification
to the National Response Center [(800) 424-8802] and to your Local Emergency Planning Committee.
Immediate.
SECTION 311 HAZARD CLASS:
SARA 313 TOXIC CHEMICALS:
MSDS Number: EGC-0001 Page 5 of 6
Current Issue Date: April, 2003
MATERIAL SAFETY DATA SHEET
Ammonium Thiosulfate Solution
The following ingredients are SARA 313 "Toxic Chemicals" and may be subject to annual reporting requirements.
CAS numbers and weight percents are found in Section 2.
INGREDIENT NAME COMMENT
No ingredients listed in this section.
STATE RIGHT-TO-KNOW
In addition to the ingredients found in Section 2, the following are listed for state right-to-know purposes.
INGREDIENT NAME WEIGHT % COMMENT
No ingredients listed in this section.
ADDITIONAL REGULATORY INFORMATION:
None.
WHMIS CLASSIFICATION (CANADA):
D2B
FOREIGN CHEMICAL CONTROL INVENTORY STATUS:
Listed on Canadian DSL and EU EINECS.
16. OTHER INFORMATION
April, 2003
CURRENT ISSUE DATE:
January, 2003
PREVIOUS ISSUE DATE:
CHANGES TO MSDS FROM PREVIOUS ISSUE DATE ARE DUE TO THE FOLLOWING:
Change in company name.
This product is not for food or drug use.
OTHER INFORMATION:
MSDS Number: EGC-0001 Page 6 of 6
Current Issue Date: April, 2003
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