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Chemical Datasheet
AMMONIUM THIOSULFATE SOLUTION (60% OR LESS) |
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Chemical Identifiers
CAS Number |
UN/NA Number |
DOT Hazard Label |
USCG CHRIS Code |
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none
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data unavailable
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NIOSH Pocket Guide |
International Chem Safety Card |
none
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none
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NFPA 704
data unavailable
General Description
An odorless colorless liquid. (USCG, 1999)
Hazards
Reactivity Alerts
Air & Water Reactions
No rapid reaction with air. No rapid reaction with water.
Fire Hazard
Special Hazards of Combustion Products: Toxic ammonia, hydrogen sulfide, and oxides of nitrogen and sulfur may form in fires. (USCG, 1999)
Health Hazard
Contact with eyes may cause eye irritation with discomfort, tearing, or blurring of vision. Contact with skin may cause irritation with discomfort or rash. (USCG, 1999)
Reactivity Profile
AMMONIUM THIOSULFATE SOLUTION is sensitive to heat. This chemical is incompatible with magnesium and aluminum powder. Mixtures with sodium chlorate can cause an exothermic reaction which can then decompose explosively. (NTP, 1992). Reacts with strong oxidizers such as chlorates, nitrates, and nitrites to release toxic ammonia, hydrogen sulfide, and sulfur trioxide gases. Will not polymerize. Ammonia, hydrogen sulfide, and oxides of nitrogen and oxides of sulfur may form in fires (USCG, 1999).
Belongs to the Following Reactive Group(s)
- Salts, Acidic
- Sulfite and Thiosulfate Salts
- Water and Aqueous Solutions
Potentially Incompatible Absorbents
No information available.
Response Recommendations
Isolation and Evacuation
No information available.
Firefighting
Fire Extinguishing Agents: Use extinguishing agents appropriate for the surrounding fire. (USCG, 1999)
Non-Fire Response
No information available.
Protective Clothing
Wear chemical protective gloves to prevent contact with solution. Use splash-proof chemical goggles or face shield to prevent splashes from contacting the eyes. (USCG, 1999)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
Get medical attention.
INHALATION: Move to fresh air.
INGESTION: Give victim two glasses of water and induce vomiting.
EYES: Flush with plenty of water for at least 15 min., lifting lids occasionally.
SKIN: Flush with water. (USCG, 1999)
Physical Properties
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point:
50°F
(USCG, 1999)
Vapor Pressure: data unavailable
Vapor Density (Relative to Air): data unavailable
Specific Gravity:
1.33
at 60.8°F
(USCG, 1999)
- Denser than water; will sink
Boiling Point:
122°F
at 760 mmHg
(USCG, 1999)
Molecular Weight:
148.2
(USCG, 1999)
Water Solubility: data unavailable
Ionization Energy/Potential: data unavailable
IDLH: data unavailable
AEGLs (Acute Exposure Guideline Levels)
No AEGL information available.
ERPGs (Emergency Response Planning Guidelines)
No ERPG information available.
PACs (Protective Action Criteria)
Chemical |
PAC-1 |
PAC-2 |
PAC-3 |
Ammonium thiosulfate; (Ammonium hyposulfite) (7783-18-8)
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1.4 ppm |
16 ppm |
94 ppm |
(DOE, 2024)
Regulatory Information
EPA Consolidated List of Lists
No regulatory information available.
CISA Chemical Facility Anti-Terrorism Standards (CFATS)
No regulatory information available.
OSHA Process Safety Management (PSM) Standard List
No regulatory information available.
Alternate Chemical Names
- AMMONIUM THIOSULFATE SOLUTION (60% OR LESS)