material safety data sheet
www.pelchem.com
1. PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME: CHEMICAL FORMULA: PRODUCT CODE:
Fluorosilicic Acid H2SiF6
COMPANY NAME:
PELCHEM: The Chemical Division of NECSA
P O Box 582, Pretoria, 0001, South Africa
Tel: 27 12 305-3396 / Fax: 27 12 305-3728
E-mail: cheminfo@pelchem.necsa.co.za / Cell: +27 83 628 0831
Emergency tel: +27 12 305-3333/4
2. COMPOSITION/INFORMATION ON INGREDIENTS
CHEMICAL NAME OF SUBSTANCE: SYNONYMS:
CONCENTRATION:
Fluorosilicic Acid Hydrogen hexafluorosilicate 40%
Hydrofluorosilicic acid, Fluosilicic
acid, Hexafluosilicic acid,
Silicofluoric acid, Sand acid
UN No: CAS-No:
1778 16961-83-4
3. HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW
Corrosive. Causes burns. Decomposes when heated,
with possible emanation of toxic hydrofluoric acid vapours.
4. FIRST AID MEASURES
SKIN CONTACT:
Remove all contaminated clothing and shoes. Wash skin with soap and large amounts of
water for at least 20 minutes. Then rub with calcium gluconate gel.
INHALATION:
Remove to fresh air and rest in half upright position. If not breathing give artificial
respiration. If breathing is difficult, give oxygen.
INGESTION:
Do not induce vomiting. If swallowed wash out mouth with water provided person is
conscious.
EYE CONTACT:
Flush with copious amounts of water or saline for at least 20 minutes. Assure adequate
flushing by separating the eyelids with fingers.
LOCAL SAFETY PRECAUTIONS:
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material safety data sheet
A shower and eye bath should be installed near the work stations.
After first aid seek medical attention.
5. FIRE-FIGHTING MEASURES
SUITABLE EXTINGUISHING MEDIA:
None, does not burn. Fight surrounding fire with an agent appropriate for the burning
material.
EXTINGUISHING MEDIA NOT SUITABLE:
SPECIFIC FIRE-FIGHTING HAZARDS:
Emits toxic fumes under fire conditions. Decomposition products upon heating include
toxic hydrogen fluoride.
SPECIFIC METHODS:
Carbon dioxide, dry chemical powder or appropriate foam.
Cool exposed containers with large quantities of water from unattended equipment or
remove intact containers.
PROTECTION FOR FIRE FIGHTERS:
Wear self-contained breathing apparatus and adequate protective clothing
6. ACCIDENTAL RELEASE MEASURES
PERSONAL PRECAUTIONS:
Wear self-contained breathing apparatus, rubber boots and heavy rubber gloves.
ENVIRONMENTAL PRECAUTIONS:
Seal off all sewer exits
METHODS FOR CLEANING UP:
Stop release and prevent material from entering sewers and waterways.
Evacuate area and confine vapours.
Cover with dry lime or soda ash, pick up, keep in a closed container and hold for waste
disposal.
Ventilate confined area and wash spill site after material pickup is complete.
7. HANDLING AND STORAGE
TECHNICAL MEASURE TO PREVENT USER EXPOSURE
Use extractor hoods
TECHNICAL MEASURES TO PREVENT FIRE AND EXPLOSION
SAFE HANDLING PRECAUTIONS
Handle with care to prevent accidental dispersion, splashing or emission of fumes. Avoid
contact with incompatible materials.
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material safety data sheet
TECHNICAL STORAGE MEASURES
The floor of the work area should be adapted to enable recuperation or neutralisation of
all the product spilt if leakage occurs.
STORAGE CONDITIONS
Containers must be labelled and kept tightly closed.
Store in a well aired, cool, dry place away from all fire hazards and reactive materials.
INCOMPATIBLE PRODUCTS
Steel, glass, copper, aluminium. Seperate from strong bases, food and foodstuffs.
8. EXPOSURE CONTROLS AND PERSONAL PROTECTION
APPROPRIATE ENGINEERING MEASURES
Ventilate work stations with local exhaust or breathing protection. Avoid prolonged or
repeated exposure.
SPECIFIC CONTROL PARAMETER (EXPOSURE LIMITS)
TLV (as F): ppm; 2.5mg F/m3 (as TWA) (ACGIH 1995-1996)
PPE: RESPIRATORY PROTECTION
Use only in a chemical fume hood.
NIOSH/MSHA-approved respirator
PPE: HAND
Anti-acid gloves made of rubber, nitrile or butyl.
PPE: EYE
Chemical safety glasses; in combination with breathing protection.
Face shield (8-inch minimum)
PPE: SKIN AND BODY
Overalls adequate for use with acids.
Rubber boots
INGESTION
Do no eat, drink or smoke whilst handling product
HYGIENE MEASURES
Wash contaminated clothing before reuse.
Discard contaminated shoes.
Wash thoroughly after handling.
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol and by
ingestion.
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material safety data sheet
9. PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE
Fuming liquid
COLOUR
Colourless to straw coloured liquid.
FORM & ODOUR
Unpleasant sour, pungent odour.
pH
Acid (pH=1 at 42%)
BOILING, MELTING AND/OR DECOMPOSITION POINTS
The substance decomposes on heating or on burning, producing toxic fumes of fluoride.
FLASHPOINT
Non-flammable.
MOLECULAR WEIGHT:
144.08
EXPLOSION PROPERTIES (LEL/UEL)
Non-explosive
SPECIFIC GRAVITY:
1.220
DENSITY
1.39kg/litre
SOLUBILITY IN WATER:
Infinite with the release of heat. Soluble in water.
FREEZING POINT:
4掳F (-15.5掳C)
PURITY:
Made to meet specification
F content by mass:
0,3167kg/F/kg 40% H2SiF6
F content by volume:
0,4402kg/F/litre 40% H2SiF6
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material safety data sheet
10. STABILITY AND REACTIVITY
STABILITY:
Stable in normal conditions.
MATERIALS TO AVOID
Strong oxidising agents, bases and water. Glass, stoneware.
HAZARDOUS DECOMPOSITION PRODUCTS
Silicon tetrafluoride and corrosive and toxic hydrogen fluoride. Carbon monoxide,
Carbon dioxide, Silicon oxide.
11. TOXICOLOGICAL INFORMATION
ACUTE TOXICITY:
LD50 = 200 mg/kg for guinea pig (orally)
LDLO = 140 mg/kg (with skin)
ACUTE EFFECTS:
Material is extremely destructive to the tissue of the mucous membranes and upper
respiratory tract, eyes and skin.
Inhalation may result in spasm, inflammation and oedema of the larynx and bronchi,
chemical pneumonitis and pulmonary oedema.
Symptoms of exposure may include burning sensation, coughing, wheezing, laryngitis,
shortness of breath, headache, nausea and vomiting.
Symptoms of exposure to inorganic fluorides may include valivation, nausea, vomiting,
abdominal pain, fever and laboured breathing. Chronic fluorine poisoning can result in
sclerosis of the bones. Calcification of ligaments, loss of weight, anorexia, anaemia,
dental effects. Ingestion of large doses can cause severe diarrhoea, and cramp-like
pains.
Symptoms may be delayed up to 24 hours depending upon the fluoride ion
concentration. Prevention of absorption of the fluoride ion in cases of ingestion can be
obtained by giving milk, chewable calcium carbonate tablets or milk of magnesia to
conscious victims. Conditions such as hypocalcaemia, hypomagnesaemia and cardiac
arrhythmias should be monitored for, since they can occur after exposure.
12. ECOLOGICAL INFORMATION:
AQUATIC ENVIRONMENT:
Accidental spillage would suddenly reduce pH level due to the product鈥檚 acidic
properties. Local disastrous effects are possible. Do not discharge into the natural
environment. Neutralise all waste products and follow current guidelines and legislation.
13. DISPOSAL CONSIDERATIONS
SAFE AND PREFERRED DISPOSAL METHODS:
Dissolve or mix the material with a combustible solvent and burn in a chemical
incinerator equipped with an afterburner and scrubber. Observe all Federal, State and
Local Environmental Regulations or contact manufacturer.
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material safety data sheet
CONTAMINATED PACKAGING:
According to local and national legislation or contact manufacturer. Indicate the
presence of fluorosilicic acid in the waste and handling precautions.
14. TRANSPORT INFORMATION
Corrosive
UN NO: 1778
ADR/RID:
Class: 8 Proper shipping name:
Labels: Corrosive
Fluorosilicic acid
Packaging group:
II
IMDG: Proper shipping name:
Labels: Corrosive
Class: 8 Fluorosilicic acid
Packaging group:
II
IATA: Proper shipping name:
Class: 8 Labels: Corrosive Fluorosilicic acid
Packaging group:
II
15. REGULATORY INFORMATION
APPLICABLE REGULATIONS:
Refer to country of destination.
SAFETY AND RISK PHRASES:
Refer to country of destination.
According to (National equivalent of EC-Dir.67/548), as amended, the product is labeled
as follows:
R34 : Corrosive
S26 : In case of contact with eyes, rinse immediately with plenty of water
and seek medical advise.
S27 : Take off immediately all contaminated clothing.
S45 : In case of accident or if you feel unwell, seek medical advise
immediately (show the product label where possible).
16. OTHER INFORMATION
RECOMMENDED USE:
Sterilization of equipment
Electroplating
Tanning of animal hides.
Ceramics and Glass: Glass etching.
Commercial Laundry: As a neutralizer for alkalis
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material safety data sheet
Hardening of cement
Oil well acidising
Rust and stain removal for textiles
Wood preservative
Water fluoridation
DISCLAIMER OF EXPRESSED AND IMPLIED WARRANTIES:
Although reasonable care has been taken in the preparation of this document, we extend no
warranties and make no representations as to the accuracy or completeness of the information
contained herein, and assume no responsibility regarding the suitability of this information for
the user鈥檚 intended purposes or for the consequences of its use. Each individual should make a
determination as to the suitability of the information for his or her particular purpose(s).
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