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Guidance on Safe Use

Guidance on Safe Use

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First-aid measures

Description of first aid measures
General advice : If additional information is needed call the Air Products Emergency Number or
consult the Air Products Safetygram 29: Medical Treatment Protocol for
Hydrofluoric Acid Burns, available on our website at Prompt medical attention is required in
all cases of exposure. The potential for hydrogen fluoride formation exi sts with
every exposure, therefore its toxicity must also be considered. Remove victim to
uncontaminated area wearing self contained breathing apparatus. Keep victim
warm and rested. Call a doctor. Apply artificial respiration if breathing stopped.
Use chemically protective clothing.
Eye contact : Seek medical treatment immediately. Irrigate eye intermittently for 20 minutes
with an aqueous calcium gluconate 1% solution, if available. In the case of
contact with eyes, rinse immediately with plenty of water and seek medical
Keep eye wide open while rinsing.
Skin contact : A physician should be consulted for all exposures . Alternative treatment is to
soak the affected areas in an iced 0.13% water solution (1:750) of Zephiran®
chloride (benzalkonium chloride solution, NF). Use ice cubes, not shaved ice, to
prevent frostbite. If soaking is impractical, soaks or compresses may be used.
(Do not us Zephiran® for burns of the eye.) Burns covering an area greater than
eight square inches require immediate treatment by a physician. If immersion is
impractical, soaked compresses of the same solution should be applied to the
area. Immersion or compresses must be used continuously for two hours. With
gloved hand apply 2.5% calcium gluconate gel to the burn area. Burns covering
an area greater than 25 square centimeters (4 square inches) require immediate
treatment by a medical doctor. Remove contaminated clothing. Flush with
copious amounts of water until treatment is available. Immediate medical
treatment is necessary as untreated wounds from corrosion of the skin heal slowly and badly.
Ingestion : Drink 1 to 3 glasses of water or milk. Do not induce vomiting. Call a physician
immediately. Never give anything by mouth to an unconscious person. Gastric
lavage with calcium chloride or calcium g luconate may be performed by a
physician. Administer several vials of 10% aqueous calcium g luconate orally.
(Calcium carbonate or an antacid containing calcium carbonate or magnesium
carbonate or hydroxide may also be used.)
Inhalation : As soon as possible give 2.5% to 3% calcium gluconate solution by nebulizer.
Move to fresh air. If breathing has stopped or is labored, give assisted
respirations. Supplemental oxygen may be indicated. If the heart has stopped,
trained personnel should begin cardiopulmonary resuscitation immediately.
Mouth to mouth resuscitation is not recommended. Use a barrier device. If
unconscious place in recovery position and seek medical advice. In case of
shortness of breath, give oxygen. Consult a doctor.
Most important symptoms and effects, both acute and delayed
Symptoms : No data available.
Indication of any immediate medical attention and special treatment needed
Treatment : If pain persists after above topical treatments, it may be necessary to inject 5%
aqueous calcium gluconate beneath, around and into the burn area. This will
more likely be necessary in the treatment of extensive burns or small burns
where treatment has been delayed. Do not use local anesthetics. Resolution of
pain is means to determine effective medical treatment. The patient should be
observed for clinical symptoms of hypocalcemia following ingestion or inhalation
or following extensive burns. Serum calcium, potassium and magnesium
determinations must be performed immediately and periodically to monitor for
hypocalcemia and electrolyte imbalance. EKGs should be done immediately and
periodically to monitor for arrhythmias, hypocalcemia and hyperkalemia. If
additional information is needed call the Air Products' Emergency Number
(Section 1) or consult the Air Products' Safetygram 29 "Treatment Protocol for
Hydrofluoric Acid Burns.

Fire-fighting measures

Extinguishing media
Suitable extinguishing media : All known extinguishing media can be used.
Extinguishing media which
must not be used for safety
: No data available.
Special hazards arising
from the substance or
: Product is nonflammable and does not support combustion. Upon exposure to
intense heat or flame, cylinder will vent rapidly and or rupture violently. Use of
water may result in the formation of very toxic aqueous solutions. Move away
from container and cool with water from a protected position. Keep adjacent
cylinders cool by spraying with large amounts of water until the fire burns itself out. If possible, stop flow of product.
Advice for fire-fighters : Use self-contained breathing apparatus and chemically protective clothing.

Accidental release measures

Personal precautions,
protective equipment and
emergency procedures
: Use chemically protective clothing. Evacuate personnel to safe areas. Ventilate
the area. Approach suspected leak areas with caution. Use self-contained
breathing apparatus or positive pressure air line with mask and escape pack in
areas where concentration is unknown or above the exposure limits.
: Should not be released into the environment. Prevent further leakage or spillage
if safe to do so. Prevent from entering sewers, basements and workpits, or any
place where its accumulation can be dangerous.
Methods and material for
containment and cleaning
: Ventilate the area. Wash contaminated equipment or sites of leaks wit h copious
quantities of water. Reduce vapor with fog or fine water spray.
Additional advice : Reduce vapor with fog or fine water spray. Large releases may require
considerable downwind evacuation. If possible, stop flow of product. Increase
ventilation to the release area and monitor concentrations. If leak is from cylinder
or cylinder valve, call the Air Products emergency telephone number. If the leak
is in the user's system, close the cylinder valve, safely vent the pressure, and
purge with an inert gas before attempting repairs.

Handling and storage

Precautions for safe handling
Teflon, calcium-filled teflon or lead are the preferred gasket materials. Systems that contain moisture may form
hydrofluoric acid. Carbon steel, stainless steel, Monel or copper are suitable materials of construction when no
moisture is present. Hastelloy, platinum or gold offer good resistance to corrosion when moisture is present. Use
equipment rated for cylinder pressure. Cylinders should be stored upright with valve protection cap in place and
firmly secured to prevent falling or being knocked over. Protect cylinders from physical damage; do not drag, roll,
slide or drop. Do not allow storage area temperature to exceed 50°C (122°F). Only experienced and prop erly
instructed persons should handle compressed gases/cryogenic liquids. Before using the product, determine its
identity by reading the label. Know and understand the properties and hazards of the product before use. When
doubt exists as to the correct handling procedure for a particular gas, contact the supplier. Do not remove or
deface labels provided by the supplier for the identification of the cylinder contents. When moving cylinders, even
for short distances, use a cart (trolley, hand truck, etc.) designed to transport cylinders. Leave valve protection
caps in place until the container has been secured against either a wall or bench or placed in a container stand and
is ready for use. Use an adjustable strap wrench to remove over-tight or rusted caps. Before connecting the
container, check the complete gas system for suitability, particularly for pressure rating and materials. Before
connecting the container for use, ensure that back feed from the system into the container is prevented. Ensure
the complete gas system is compatible for pressure rating and materials of construction. Ensure the complete gas
system has been checked for leaks before use. Employ suitable pressure regulating devices on all containers
when the gas is being emitted to systems with lower pressure rating than that of the container. Never insert an
object (e.g. wrench, screwdriver, pry bar, etc.) into valve cap openings. Doing so may damage valve, causing a leak to occur. Open valve slowly. If user experiences any difficulty operating cylinder valve discontinue use and
contact supplier. Close container valve after each use and when empty, even if still connected to equipment.
Never attempt to repair or modify container valves or safety relief devices. Damaged valves should be reported
immediately to the supplier. Close valve after each use and when empty. Replace outlet caps or plugs and
container caps as soon as container is disconnected from equipment. Do not subject containers to abnormal
mechanical shock. Never attempt to lift a cylinder by its valve protection cap or guard. Do not use containers as
rollers or supports or for any other purpose than to contain the gas as supplied. Never strike an arc on a
compressed gas cylinder or make a cylinder a part of an electrical circuit. Keep container valve outlets clean and
free from contaminates particularly oil and water. Do not smoke while handling product or cylinders. Never
re-compress a gas or a gas mixture without first consulting the supplier. Never attempt to transfer gases from one
cylinder/container to another. Always use backflow protective device in piping. Purge air from system before
introducing gas. Purge system with dry inert gas (e.g. helium or nitrogen) before gas is introduced and when
system is placed out of service. Avoid suckback of water, acid and alkalis. Installation of a cross purge assembly
between the cylinder and the regulator is recommended. When returning cylinder install valve outlet cap or plug
leak tight. Never use direct flame or electrical heating devices to raise the pressure of a container. Containers
should not be subjected to temperatures above 50°C (122°F). Prolonged periods of cold temperature belo w -30°C
(-20°F) should be avoided. Never attempt to increas e liquid withdrawal rate by pressurizing the container without
first checking with the supplier. Never permit liquefied gas to become trapped in parts of the system as this may
result in hydraulic rupture.
Conditions for safe storage, including any incompatibilities
Full containers should be stored so that oldest s tock is used first. Containers should be stored in a purpose build
compound which should be well ventilated, preferably in the open air. Observe all regulations and local
requirements regarding storage of containers. Stored containers should be periodically checked for general
condition and leakage. Local codes may have special requirements for toxic gas storage. Protect containers
stored in the open against rusting and extremes of weather. Containers should not be stored in conditions likely to
encourage corrosion. Containers should be stored in the vertical position and properly secured to prevent toppling.
The container valves should be tightly closed and where appropriate valve outlets should be capped or plugged.
Container valve guards or caps should be in place. Keep containers tightly closed in a cool, well-ventilated place.
Full and empty cylinders should be segregated. Do not allow storage temperature to exceed 50°C (122°F) . Return
empty containers in a timely manner.
Technical measures/Precautions
Provide sufficient air exchange and/or exhaust in work rooms. Containers should be segregated in the storage
area according to the various categories (e.g. flammable, toxic, etc.) and in accordance whit local regulations.

Transport information

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Marine transport (UN RTDG/IMDG)

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Exposure controls / personal protection

Stability and reactivity

Disposal considerations