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Chemical Datasheet

AMMONIUM HYPOPHOSPHITE

Chemical Identifiers

CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code
  • 7803-65-8
 none data unavailable
  • AHP
NIOSH Pocket Guide International Chem Safety Card
none none
NFPA 704
data unavailable
General Description
White crystalline solid. Sinks and mixes with water. (USCG, 1999)

Hazards

Reactivity Alerts
Air & Water Reactions
Water soluble. It liberates spontaneously flammable phosphine at about 240°C [Mellor 8:880 1946-47].
Fire Hazard
Special Hazards of Combustion Products: Decomposes at 240 emitting phosphine and POx. Phosphine is a very toxic gas which ignites spontaneously.

Behavior in Fire: Decomposes when heated with evolution of phosphine which ignites spontaneously. (USCG, 1999)
Health Hazard
Non-toxic or low toxicity unless heated to decomposition (240°C). (USCG, 1999)
Reactivity Profile
AMMONIUM HYPOPHOSPHITE liberates spontaneously flammable phosphine at about 240°C [Mellor 8:880 1946-47]. Some inorganic materials, such as hypophosphites, tend to form explosive mixtures with perchloric acid when hot [Analyst 84:215 1959].
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents

No information available.

Response Recommendations

Isolation and Evacuation
No information available.
Firefighting
Fire Extinguishing Agents: Carbon dioxide, dry chemical, or water spray (USCG, 1999)
Non-Fire Response
No information available.
Protective Clothing
Rubber gloves, safety glasses, and normal protective gear. (USCG, 1999)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
Not applicable (USCG, 1999)

Physical Properties

Chemical Formula:
  • H6NO2P
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point: 392°F (USCG, 1999)
Vapor Pressure: data unavailable
Vapor Density (Relative to Air): data unavailable
Specific Gravity: 1.634 at 68°F (USCG, 1999) - Denser than water; will sink
Boiling Point: Decomposes 464°F (USCG, 1999)
Molecular Weight: 83.0271 (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)

No PAC information available.

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