MATERIAL SAFETY DATA SHEET

 

Wausau Chemical Corporation, 2001 N. River Drive, Wausau, WI 54403

                                                                            Last Revision:                January 14, 2004

HMIS Hazard 4 – Extreme                  Health              3 3 – High                       Fire                  0 2 – Moderate               Reactivity         1 1 – Slight                      Other 0 - Least

Emergency       CHEMTREC               800-424-9300

Phones:            Wausau Chemical         715-842-2285

SECTION 1 - MATERIAL IDENTIFICATION

 

 

 

NAME:            HYDROFLUOROSILICIC ACID

FORMULA:                H₂ SiF₆ M.W. = 144.06

SYNONYMS:             HFS; Florosilicic Acid; Fluosilicic Acid; Hexafluosilicic Acid

MANUFACTURERS: LCI Ltd; Solvay Fluorides

SECTION 2  - HAZARDOUS INGREDIENTS

 

 

 

HAZARDOUS CHEMICAL               CAS #             PERCENT       PEL/TWA        SARA III, SEC 313    

FLUOROSILICIC ACID                    16916-83-4     >23+%                        2.5 mg/m³                     NO

 

SECTION 3 – CHEMICAL AND PHYSICAL PROPERTIES

 

 

 

Appearance:  Clear, colorless to straw yellow fuming liquid                    Boiling Point (^oF):         222 ^oF

Odor:               Pungent, burning, irritating odor                         Freezing Point (^oF):       - 4 ^oF

pH:                         1.2 (1% solution)                            Specific Gravity (H₂O=1):                     1.234 @ 77 ^oF

Water solubility:            Complete                                 Vapor Pressure, mm Hg, 77^oF  24

Vapor Density (air=1)   :           NA                              Volatile Organic (VOC) content:           NA

Evaporation Rate:                     NA

 

Evaporation Rate (Butyl Acetate = 1)               

SECTION 4 – FIRE AND EXPLOSION HAZARDS

NA

 

Flash Point (Method):               NA                  Explosive Limits: Lower            NA      Upper              NA     

Flammable Limits:                     NA                  Auto Ignition Temperature:        NA

Extinguishing Media:                 As appropriate for the surrounding fire.

 

Special Fire Fighting Procedures and Hazards:  Use NIOSH approved self-contained acid suits. Keep containers cool with water using fog nozzles to prevent decomposition above 227 ^oF.

 

Unusual Fire & Explosion Hazards:       Reacts with metals to form flammable and explosive hydrogen gas. Above 227 ^oF decomposition occurs to form toxic and corrosive fumes of flurorides.

 

SECTION 5 – REACTIVITY INFORMATION

 

 

Stable:    X  Unstable:               Hazardous Polymerization:   Occurs:                 Does not Occur:           X

 

Conditions to Avoid:                 Temperatures above 227 ^oF.

 

Materials to Avoid:                   Strong alkalis, strong acids, hypochlorites, metal, glass, stoneware.

 

Decomposition Products:          Hazardous toxic and corrosive fumes of hydrogen fluoride, silica tetrafluoride and hydrogen gas. can form above 227 ^oF due to decomposition.

Hydrofluorosilicic Acid                                                                                                                      Page 2

SECTION 6 – HEALTH HAZARDS – PROTECTIVE MEASURES  – FIRST AID

 

 

Carcinogen:      No

ACUTE:           Liquid or vapors can cause severe irritation and burns that may not be apparent for hours. Can cause severe irritation to the lungs, nose and throat. If swallowed, can cause severe damage to the throat and stomach.

CHRONIC:     Prolonged exposure can result in bone changes, corrosive effect on mucous membranes including ulceration of the nose, throat and bronchial tubes, cough, shock, pulmonary edema, fluorosis, coma and death.

EYES:              Flush for 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. Use tight-fitting chemical splash goggles and a full-face shield. Contact lenses should not be worn. Get immediate medical help.

SKIN:              Flush with water for 15 minutes. Remove all contaminated clothing. Medial attention is necessary, even for minor burns. Use rubber or neoprene gloves and apron.

INHALATION:           Mist or vapors can cause severe irritation of the respiratory system. Use a NIOSH approved cartridge with a full-face shield. For exposure above 20 ppm use a self-contained breathing apparatus.

INGESTION:              If conscious, give the exposed person large quantities of water or milk. DO NOT induce vomiting. Get immediate medical attention.

IN ALL CASES:          GET PROMPT MEDICAL ATTENTION IF ADVERSE EFFECTS PERSIST

PHYSICIAN NOTE:   beware of late onset of pulmonary edema for up to 48 hours. Treat severe burns similar to hydrofluoric acid exposure.

PRIMARY ROUTES OF ENTRY:      Skin, eyes, inhalation, ingestion.

HYGIENE:      Wash hands and face before eating or drinking. Wash soiled clothing before wearing again                     if contact occurs.

SECTION 7 – PRECAUTIONS FOR SAFE HANDLING, STORAGE AND USE

 

 

 

SPILLS AND LEAKS:            Contain to prevent loss to the environment. Collect excess material. Provide adequate ventilation. Use a NIOSH approved respirator if fumes are excessive.

STORAGE AND HANDLING:           Keep containers tightly closed. Store at ambient temperatures.

WASTE DISPOSAL:              Follow recommendations of local, state and federal regulations.

EMPTY CONTAINERS:        Rinse with water. Send to a recycling center or return to Wausau Chemical Corporation.

SECTION 8 – REGULATORY INFORMATION

 

 

 

DOT SHIPPING DESCRIPTION:      FLOUROSILICIC ACID, 8, UN1778, PG II

 

LABEL REQUIRED:                           CORROSIVE

 

The information contained herein is given in good faith, but no warranty, representation, inducement or license of any kind is made, except that the information is accurate to the best of Wausau Chemical Corporation’s knowledge, or is obtained from sources believed by Wausau Chemical Corporation to be reliable and accurate. Wausau Chemical Corporation does not assume any legal responsibility for use or reliance upon the information being furnished. Customers are encouraged to conduct their own tests. Before using any product, read the container label directions as well as the Material Safety Data Sheet.

 

 

 

 

 

 

ND – Not Determined              NA - Not Applicable                NE – Not Established