Ammonium hypophosphite

  • Ammonium phosphinate
Formula
NH4H2PO2
Structure
Description
White crystalline solid.
Uses
Catalyst in polyamide mfr.

Registry Numbers and Inventories.
CAS
7803-65-8
EC (EINECS/ELINCS)
232-266-0
Merck
12,559
Beilstein/Gmelin
180889 (G)
Canada DSL/NDSL
NDSL
US TSCA
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
H6NO2P
Formula mass
83.03
Melting point, °C
200
Decomposition point, °C
240
Density
1.634 g/cm3
Solubility in water
1 g/1 ml

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Stability
No data.

Fire.
Fire fighting
Fire Extinguishing Agents: Carbon dioxide, dry chemical, or water spray
Fire potential
Decomposes when heated with evolution of phosphine which ignites spontaneously.
Combustion products
Decomposes at 240 emitting phosphine and PO x.

Health.
Exposure effects
Rapid heart rate and abnormally low blood pressure may occur. Dizziness, headache, fatigue, stupor, restlessness, ataxia, seizures, and coma may be noted. No data were available to assess the teratogenic potential of this agent. <br>Decreased egg production has occurred in experimental animals. Ammonia crosses the ovine placental barrier. <br>No data were available to assess the potential effects of exposure to this agent during lactation. <br>No information about possible male reproductive effects was found in available references.
   Ingestion
Nausea, vomiting, abdominal pain, and diarrhea may occur.
   Inhalation
Mucous membrane irritation, shortness of breath, cough, sputum production chest tightness, dyspnea, ards, and delayed onset of pulmonary edema may occur.
   Skin
Sweating and cyanosis have been seen.
   Eyes
Irritation of the mucous membranes may be noted.

First aid
 
   Ingestion
The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation. Activated charcoal activated charcoal binds most toxic agents and can decrease their systemic absorption if administered soon after ingestion. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Treatment should include recommendations listed in the oral exposure section when appropriate.
   Eyes
If symptoms develop, immediately move individual away from exposure and into fresh air. Flush eyes gently with water for at least 15 minutes while holding eyelids apart; seek immediate medical attention.

Transport.
USCG CHRIS Code
AHP