- Sulfurous acid, monoammonium salt
- Acid ammonium sulfite
- Ammonium hydrogensulfite
Source of sulfur in fluid fertilizers.
Registry Numbers and Inventories.
Japan ENCS (MITI)
Melting point, °C
Decomposition point, °C
2.03 g/cm3 (20 C)
Solubility in water
Hazards and Protection.
Keep containers tightly closed in a well ventilated area away from food products. Keep away from heat and water.
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.
Wear face shield or safety glasses and rubber gloves.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: Add calcium hypochlorite (Ca(ClO)2). Neutralize with dilute acid. Adjust pH to neutral (pH=7).
Can react explosively with strong oxidizing agents.
When heated to decomposition it emits toxic vapors of ammonia. When heated to decomposition it emits very toxic fumes of so(x) sulfur oxides, NOX nitrogen oxides and nh(3).
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.)
Contact with metals may evolve flammable hydrogen gas.
Increases in blood pressure and pulse have been reported. An altered mental status (coma) may be seen, but is not characteristic unless hypoxemia occurs. Seizures may occur with extensive absorption. 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.
Nausea and vomiting occur frequently following ingestion. Swelling of the lips, mouth, and larynx, and oral or esophageal burns may occur if concentrated ammonia solutions are ingested.
TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Effects of contact or inhalation may be delayed.
Concentrated ammonia may produce liquifaction necrosis and deep penetrating burns.
Swelling of the tongue, angioedema, difficulty in swallowing, or upper airway obstruction may occur in sensitive individuals. Ocular injury may occur from exposure to high concentrations.
Seek medical assistance.
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
Flush exposed area with water.
Flush with water.