Page 25 - Handbook of Hazardous Chemical Properties

AMMONIUM BIFLUORIDE 15

Physical and Chemical Properties - Physical State at 15 'C and I atm.: Gas; Molecular Weight:
17.03; Boiling Point at I atm.: -28.1, -33.4, 239.8; Freezing Point: -108, -77.7, 265.5; Critical
Temperature: 271, 133,406; Critical Pressure: 1,636, 11.3, 11.27; Specijic Gravity:O.682 at -33.4"C
(liquid); Vapor (Gas) Density: 0.6; Ratio of Specific Heats of Vapor (Gas): 1.3 at 20°C; Latent Heat
of Vaporizdon: 589, 327, 13.7; Heat of Combustion: -7992, -4440, -185.9; Heat of Decomposition:
Not pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Gas-tight chemical
goggles, self-contained breathing apparatus, rubber boots, rubber gloves, emergency shower and eye
bath, Symptoms Following Exposure: 700 ppm causes eye irritation, and permanent injury may result
if prompt remedial measures are not taken; 5000 ppm can cause immediate death from spasm,
inflammation, or edema of the larynx. Contact of the liquid with skin freezes the tissue; causes a caustic
burn; General Treatment for Exposure: INHALATION: move victim to fresh air, give artificial
respiration if necessary. Oxygen may be useful. Observe for laryngeal spasm and perform tracheostomy
if indicated. SKIN OR EYES: flood immediately with running water for 15 min. Treat as thermal burn;
Toxicity by Inhalation (Threshold Limit Value) : 25 ppm; Short-Tern Exposure Limits: 50 ppm for 5
min.; Toxicity by Ingestion: Not pertinent; Late Toxicity: Not pertinent; Vapor (Gar) Irritant
Characteristics: Vapors cause severe eye or throat irritation and may cause eye or lung injury; vapors
cannot be tolerated even at low concentrations; Liquid or Solid Irritant characteristics: Causes smarting
of the skin and fmt-degree bums on short exposure; may cause secondary burns on long exposure;
Odor l'hreshold 46.8 ppm.
Fire Hazards - Flash Point: Generally not flammable; Flammable Limits in Air (%): 15.50 - 27.00;
Fire Ertinguishing Agents: Stop flow of gas or liquid. Let fire burn; Fire Extinguishing Agents Not To
Be Used None; Special Hazards of Combustion Products: Not pertinent; Behavior in Fire: Not
pertinent; Ignition Temperature (deg. F): 1204; Electrical Hazard Class I, Group D; Burning Rate:
1 mm/min.
Chemical Reactivity - Reactivity with Water: Dissolves with mild heat effect; Reactivity with Common
Materials: Corrosive to copper and galvanized surfaces; Stability During Tmport: Stable;
Neutralizing Agents for Acids and Caustics: Dilute with water; Polymeriz&'on: Not pertinent; Inhibitor
of Polymerization: Not pertinent.

AMMONIUM BJFLUOR.DE
Chemical Designations - Synonyms: Acid Ammonium Fluoride, Ammonium Acid Fluoride,
Ammonium Hydrogen Fluoride; Chemical Fornula: WNF,.
Observable Characteristics - Physical State (as normally shipped): Solid; Color: White; Odor: None.
Physical and Chemical Properties - Physical State at 15 'C and I atm. : Solid; Molecular Weighr:
57.04; Boiling Point at 1 atm.: 463.1, 239.5, 512.7; Freezing Point: 258, 125.6, 398.8; Critical
Temperature: Not pertinent; Critical Pressure: Not pertinent; Specific Gravity: 1.5 at 20°C (solid);
Vapor (Gas) Density: Not pertinent; Ratio of SpeciJc Heats of Vqor (Gas): Not pertinent; Latent Heat
of Vaporizm.on: Not pertinent; Heat of Combustion: Not pertinent; Heat of Decomposition: Not
pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Bu. Mines approved
respirator; rubber gloves; safety goggles; Symptoms Following Exposure: Inhalation of dust may cause
irritation of respiratory system. Ingestion causes irritation of mouth and stomach, vomiting, abdominal
pain, convulsions, collapse, acute toxic nephritis. Contact with dust irritates eyes and may cause burns
or rash on skin. High concentrations of fluorine in the urine have been reported following skin contact;
General Treatment for Exposure: Begin first aid as quickly as possible. INHALATION: remove victim
to fresh air. INGESTION: perform gastric lavage with lime water or 1% calcium chloride solution;
support respiration; call a physician. EYES: flush with water for at least 15 min.; consult physician.
SKIN: flush with water; treat burns. OTHER: remove all contaminated clothing in the shower at once;
Toxicity by Inhalation (Threshold Limit Value): 2.5 mg/m3 (as fluorine); Short-Tern Exposure Limits:
Data not available; Toxiciry by Ingestion: Grade 3; LD, 50 mg/kg (guinea pig), 60 mg/kg (rat); Late
Toxicity: Data not available; Vapor (Gas) Initant Characteristics: Data not available; Liquid or Solid