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Univar USA Inc.
6100 Carillon Point
Kirkland, WA 98033
(425)
889-3400
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For Emergency
Assistance involving chemicals call - CHEMTREC (800) 424-9300
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The Version Date for this MSDS is :
12/01/2000
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SECTION I PRODUCT IDENTIFICATION
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PRODUCT NAME: FLUOROSILICIC ACID
(HYDROFLUOSILICIC ACID 25-27%)
MSDS #:
P16930V
DATE ISSUED: 3/1999
SUPERSEDES: 5/1994
ISSUED BY: 005351
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DOT Chemical Name: Fluorosilicic Acid
SYNONYMS: Hydrofluosilicic Acid, Fluosilicic Acid, Hexafluosilicic
Acid
CHEMICAL FAMILY: Inorganic Acid
Formula: H2 SiF6
CAS Number: 16961-83-4
NIOSH REGISTRY # VV8225000
Note: N/A indicates Not Applicable where shown.
SECTION II
PERSONAL PROTECTION INFORMATION
Respiratory Protection: A NIOSH approved cartridge respirator
with
full-face shield. Chemical cartridge should provide protection
against
acid fumes, (Hydrogen Fluoride.) For concentrations
greater than 20 ppm,
a NIOSH approved self-contained breathing apparatus with full-face
shield
should be used.
Eye and Face Protection: Use tight-fitting chemical splash
goggles and
a full face shield, 8 inch minimum. Contact lenses should not
be
worn.
Hand, Arm and Body Protection: Prevent contact with skin by
use of acid-
proof clothing, gloves and shoes. Use a NIOSH approved acid
proof suit
and boots where liquid or high vapor concentration is possible.
Other Protective Clothing and Equipment: Eye wash and
emergency shower
facilities should be available in handling area.
Engineering Controls: General or local exhaust systems
sufficient to
maintain vapors below 2.5 mg/m3 (as F).
SECTION III
HEALTH INFORMATION
OSHA PERMISSIBLE Exposure Limit (PEL) (2.5 mg/m3) (as F)
ACGIH Threshold Limit Value (TLV): (2.5 mg/m3) (as F)
Listed in the following
Department of Transportation Hazardous Materials Regulations (49
CFR)
Massachusetts Hazardous Substances List
Toxic Substances Control Act Inventory of Toxic Substances (TSCA)
OSHA Health Hazard Classification: Corrosive
Primary Route(s) of Entry: Eye and skin contact, inhalation.
Symptoms of Exposure:
Acute: Liquid on vapors can cause severe irritation and burns
which
may not be apparent for hours. Can cause severe
irritation to the
lungs, nose and throat. If swallowed, can cause severe damage
to
throat and stomach.
Chronic: Prolonged exposure could result in bone changes,
corrosive
effect on mucous membranes including ulceration of nose, throat
and bronchial tubes, cough, shock, pulmonary edema, fluorosis,
coma and death.
Aggravated Medical Condition: Any skin condition and/or
preexisting
respiratory disease including asthma and emphysema.
Toxic Data: LD50 200 mg/kg (Oral - guinea pig)
SECTION IV
EMERGENCY AND FIRST AID PROCEDURES
Inhalation: Remove exposed person to an uncontaminated area
immediately.
If breathing has stopped, start artificial respiration at once.
Oxygen should be provided for an exposed person having difficulty
breathing (but only by an authorized person) until exposed person
is able to breathe easily by themselves. Exposed person should
be examined
by a physician.
Eye Contact: Flush eyes at least 15 minutes with large amounts
of water.
Eyelids should be held apart during the flushing to insure contact
of water with all accessible tissue of the eyes and lids.
Medical
attention should be given as soon as possible.
Skin Contact: Exposed person should be removed to an
uncontaminated
area and subjected immediately to a drenching shower or water for a
minimum of 15 to 20 minutes. Remove all contaminated clothing
while under shower. Medical attention should be given as soon
as
possible to all burns, regardless of how minor they seem.
Ingestion: If conscious, give the exposed person large
quantities
of water immediately to dilute the acid. Do NOT induce
vomiting.
Milk may be given for its soothing effect. A physician should
be
contacted immediately.
Note to Physician: Beware of late onset of pulmonary edema for
up to 48 hours. Treat severe burns similar to hydrofluoric
acid exposure.
SECTION V
INGREDIENTS
Composition
Percentage
H2SiF6
25.0 +/- 2%
H2O
75.0 +/- 2%
SECTION VI
PHYSICAL DATA
Boiling Point: 222 F (105 C)
Freezing Point: -4 F (-15.5 C)
Specific Gravity (H2O=1): 1.234 @ 25%
Vapor Pressure (mm Hg): 24@ 77 F
Percent Volatile by Volume: N/A
Vapor Density (Air=1): N/A
Solubility in Water: Complete
Evaporation Rate: N/A
Physical State: Fuming liquid
Molecular Weight: 144.08
Bulk Density: 10.29 lbs/gal @ 25 %
Ph (1% solution): 1.2
Appearance and Odor: Water white to straw yellow burning liquid with
pungent odor.
SECTION VII
REACTIVITY
Stability: Stable
Hazardous Polymerization: Will not occur.
Conditions to Materials to Avoid: Metal, glass, stoneware,
alkali and
strong concentrated acids.
Hazardous Decomposition Products: When heated to decomposition (227
F),
it emits highly toxic and corrosive fumes of Hydrogen Fluoride,
Silica
Tetrafluoride and Hydrogen Gas.
SECTION VIII
FIRE AND EXPLOSION HAZARDS
Flash Point and Method Used: N/A
Flammable Limits % Volume in Air: Lower: N/A
Upper: N/A
Extinguishing Media: Use agent which is appropriate for surrounding
fire.
Special Fire Fighting Procedures and Precautions: Wear NIOSH
approved
self-contained acids suits.
Autoignition Temperature: N/A
Unusual Fire and Explosion Hazards: Reacts with many metal to
produce flammable and explosive hydrogen gas. Keep container
cool with
water, using fog nozzles, as decomposition will occur above 227 F
and
produce toxic and corrosive fumes of fluorides.
SECTION IX
STORAGE AND SPECIAL PRECAUTIONS
Handling and Storing Precautions: Store in containers in cool,
dry
well ventilated area away from sources of heat or ignition.
Do NOT store in glass or stoneware. Use non-sparking tools. Keep
separate from alkali metals, oxidizing agents, combustible solids
and organic peroxides.
Ventilation: Provide adequate general and/or local exhaust to
maintain
vapors below 2.5 mg/m3 (as F).
Other Precautions: Do not inhale fumes and prevent skin contact.
If
pungent, irritating odor can be detected, workers are being
overexposed.
Eye wash and safety shower should be available in all acid handling
areas.
SECTION X
TRANSPORTATION REQUIREMENTS
DOT Proper Shipping Name: Fluorosilicic Acid
Depart of Transportation Hazard Class: 8
Identification Number: UN1778
EPA Hazardous Substance: No
Packing Group: II
Subsidiary Hazard Class: N/A
Reportable Quantity: N/A
RCRA Status of Unused Material if Discarded: Not listed
Hazardous Waste Number: Not listed
Waste Disposal Method: Disposer must comply will federal,
state
and local disposal or discharge laws.
Additional Comments: For international transportation,
Fluorosilicic
Acid is regulated by the International Maritime Organization (IMO)
and
the International Air Transport Association (IATA) for vessel and
air
movement as a Class 8. Packaging, marking, labeling and
shipping paper
descriptions must precisely reflect the regulation for export
movement.
SECTION XI
EMERGENCY ACTION - SPILL OR LEAK
Emergency Action: Keep unnecessary people away. Stay upwind;
keep out
of low areas. Isolate hazard area and deny entry. We
recommend that
the user establish a spill prevention, control and countermeasure
plan.
This plan should included procedures for proper storage as well as
containment and clean-up spills and leaks. The procedures
should conform
to safe practices and provide for proper recovery and disposal in
accordance with federal, state and local regulation. Contact
Chemtrec at 1-800-424-9300 for 24-hour emergency assistance.
Small Spills: Any personnel in area should wear a NIOSH
approved air
supplied acid suit. Dike area to contain material.
Do not allow solution to enter sewers or surface water. Neutralize
the spill with water and lime (hydrated lime). Take up with sand or
non-combustible absorbent material and place in containers for later
disposal.
Provide ventilation and be wary of Hydrogen generation
upon reaction with some metals. Contact Chemtrec at
800-424-9300 for 24
hour emergency assistance.
Large Spills: Contact Chemtrec at 800-424-9300 for 24 hour
emergency
assistance. Any personnel in area should wear a NIOSH approved
air
supplied acid suit. Dike area ahead of spill to contain
material.
Do not allow solution to enter sewers to surface water. Neutralize
the spill with water and lime (hydrated lime).
Provide ventilation and be wary of Hydrogen generation
upon reaction with some metals.
Notify the National Response Center, if required. |
