Page 213 - Handbook of Hazardous Chemical Properties

HYDROFLUORIC ACID 203

INHALATION: remove person to fresh air; keep him warm and quiet and get medical attention
immediately; start artificial respiration if breathing stops. INGESTION: have person drink water or
milk; do NOT induce vomiting. EYES: immediately flush with plenty of water for at least 15 min. and
get medical attention; continue flushing for another 15 min. if physician does not arrive promptly.
SKIN: immediately flush skin while removing contaminated clothing; get medical attention promptly;
use soap and wash area for at least 15 min.; Toxicity by Inhalation (Threshold Limit Value): 5 ppm;
Short-Tern Inhalation Limits: 5 ppm for 5 min.; Toxicity by Ingestion: Data not available; Late
Toxicity: None; Vapor (Gas) Irritant Characteristics: Vapor is moderately irritating such that personnel
will not usually tolerate moderate or high vapor concentrations; Liquid or Solid Im'tant Characteristics:
Fairly severe skin irritant; may cause pain and second-degree burns after a few minutes contact; Odor
Threshold: 1 - 5 ppm.
Fire Hazards - Flash Point : Not flammable; Flammable Limits in Air (96): Not flammable; Fire
Extinguishing Agents: Not pertinent; Fire Extinguishing Agents Not To Be Used: Not pertinent; Special
Hazards of Combustion Products: Toxic and irritating vapors are generated upon heating; Behavior in
Fire: Not pertinent; Ignition Temperature : Not flammable; Electrical Hazard: Not pertinent; Burning
Rate: Not flammable.
Chemical Reactivity - Reactivity with Water: No reaction; Reactivity with Common Materials:
Corrosive to most metals with the evolution of flammable and explosive hydrogen gas; Stability During
Transport: Stable; Neurralizing Agents for Aci& and Caustics: Flush with water and apply powdered
limestone, slaked lime, soda ash, or sodium bicarbonate; Polymerization: Not pertinent; Inhibitor of
Polymerization: Not pertinent.
HYDROFLUORIC ACID
Chemical Designations - Synonyms: No common synonyms; Chemical Formula: HF-H,O.
Observable Characteristics - Physical State (as shipped): Liquid; Color: Colorless to slightly yellow;
Odor: Pungent, irritating.
Physical and Chemical Properties - Physical State at 15 "c and I atm. : Liquid; Molecular Weight:
Not pertinent; Boiling Point at I am.: 152, 67, 340; Freezing Point: Not pertinent; Critical
Temperature: Not pertinent; Critical Pressure: Not pertinent; Specific Gravity: 1.258 at 25T, (liquid);
Vapor (Gas) gecific Gravity: Not pertinent; Ratio of specific Heats of Vapor (Gas): Not pertinent;
Latent Heat of Vaporizm'on: 649, 361, 15.1; He# of Combustion: Not pertinent; Heat of
Decomposition: Not pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Proper protective
clothing must be worn that encapsulates the body including the face. A shower and an eye wash must
be available; Symptoms Following Exposure: Serious and painful burns of eyes and skin; General
Treatment for Exposure: INGESTION: have victim drink water or milk; do NOT induce vomiting.
SKIN: if victim has come in contact with liquid or vapor, put him in a shower and call a physician.
EYES: flush with water for at least 15 min. and consult physician; Toxicity by Inhalation Freshold
Limit Value): 3 ppm; Short-Term Inhalation Limits: 500 ppm for 60 min.; Toxicity by Ingestion: Data
not available; Late Toxicity: Data not available; Vapor (Gas) Irritant Characteristics: Vapors cause
severe irritation of eye and throat and can cause eye and lung injury. They cannot be tolerated even at
low concentrations; Liquid or Solid Irritant Characteristics: Severe skin irritant. Causes second- and
third-degree burns on short contact; very injurious to the eyes; Odor Threshold Data not available.
Fire Hazards - Flash Point : Not flammable; Flammable Limits in Air (96): Not flammable; Fire
Extinguishing Agents: Not pertinent; Fire Extinguishing Agents Not To Be Used: Not pertinent; Special
Hazards of Combustion Products: Toxic and irritating vapors are generated upon heating; Behavior in
Fire: Not pertinent; Ignition Temperature : Not flammable; Electrical Hazard: Not pertinent; Burning
Rate: Not flammable.
Chemical Reactivity - Reactivity with Water: No reaction; Reactivity with Common Materials: Will
attack glass, concrete and certain metals containing silica, such as cast iron. Will attack natural rubber,
leather, and many organic materials. Can generate flammable and explosive hydrogen when in contact
with some metals; Stability During Transport: Stable but requires special packaging; Neutralizing