# MATERIAL SAFETY DATA SHEET

1. Product and Company Identification
Material Name SYNTHETIC CRYOLITE MSDS Number **189** CAS Number **13775-53-6** Product use **Electrolyte for aluminum reduction cells** Synonym(s) **Cryolite, Sodium aluminum fluoride, Trisodium hexafluoroaluminate** Manufacturer/supplier information **Alcoa Inc. 201 Isabella Street**  **Pittsburgh, PA 15212-5858 US Health and Safety Email: accmsds@alcoa.com**  **Health and Safety Fax: +1-412-553-4822 Health and Safety Tel: +1-412-553-4649**  Emergency Information **USA: Chemtrec: +1-703-527-3887 +1-800-424-9300 (24 Hour Emergency Telephone, multiple languages spoken); ALCOA: +1-412-553-4001 (24 Hour Emergency Telephone, only English**  **spoken)** Website **For a current Material Safety Data Sheet, refer to Alcoa websites: www.alcoa.com or internally at my.alcoa.com EHS Community**  

### 2. Hazards Identification Emergency overview **Solid, granular to powder. Light brown. Odorless. Non-combustible. Not an explosion hazard.**
**Direct contact: Can cause irritation of the eyes and skin. Dust: Can cause irritation of the upper respiratory tract.** 
**Additional health effects from elevated temperature processing (e.g., if heated to decomposition): Vapors: Can cause severe irritation of the respiratory tract. Acute overexposures: Can cause the**  **accumulation of fluid in the lungs. Effects can be delayed up to 24 hours.** Potential health effects **The following statements summarize the health effects generally expected in cases of overexposures. User specific situations should be assessed by a qualified individual. Additional health information can be found in Section 11.**  Eyes **Direct contact: Can cause irritation.** Skin **Direct contact: Can cause irritation.** Inhalation **Dust: Can cause irritation of the upper respiratory tract. Chronic overexposures: Can cause fluoride deposition in bones and cartilage (fluorosis). Associated with asthma.** 
**Additional health effects from elevated temperature processing (e.g., if heated to decomposition): Vapors: Can cause severe irritation of the respiratory tract. Acute overexposures: Can cause the**  **accumulation of fluid in the lungs (pulmonary edema). Effects can be delayed up to 24 hours.** Ingestion **Can cause irritation of the gastrointestinal tract. This product may be harmful or fatal if swallowed in large quantities.**  Carcinogenicity and Reproductive Hazard **Does not present any cancer or reproductive hazards.**

Medical conditions aggravated by exposure to product **Asthma, chronic lung disease, and skin rashes.**



### 3. Composition / Information on Ingredients Composition comments **Complete composition is provided below and may include some components classified as non-hazardous.**  Components CAS # Percent

**Cryolite (Trisodium hexafluoroaluminate) 13775-53-6 >90** 

Material name: SYNTHETIC CRYOLITE 0189 Version #: 09 Print date: 07-18-2011 ALCOA MSDS US 1 / 7Additional Information **Present as impurity: Chiolite (1302-84-7), <5% and Aluminum oxide (1344-28-1), <2%. Cryolite may contain small amounts (<1%) of other metal fluorides: Calcium fluoride (7789-75-5)**  **and Magnesium fluoride (7783-40-6). Loss on ignition 2-6%**  **Additional compounds which may be formed (during decomposition) are listed in Section 8.** 

### 4. First Aid Measures First aid procedures Eye contact **Rinse eyes with plenty of water or saline for at least 15 minutes. Consult a physician.** Skin contact **Wash with soap and water for at least 15 minutes. Get medical attention if irritation develops or persists.**  Inhalation **Remove to fresh air. Check for clear airway, breathing, and presence of pulse. If breathing is difficult, provide oxygen. Loosen any tight clothing on neck or chest. Provide cardiopulmonary**  **resuscitation for persons without pulse or respirations. Consult a physician.** Ingestion **If swallowed, dilute by drinking water. Recommend quantities up to 30 mL (~1 oz.) in children and 250 mL (~9 oz.) in adults. Never give anything by mouth to a victim who is unconscious or is**  **having convulsions. Do NOT induce vomiting. Call a physician immediately.** 

### 5. Fire Fighting Measures Flammable/Combustible Properties **Non-combustible.**

Fire / Explosion Hazards **Hydrogen fluoride gas can be evolved above 930°F (500°C) in the presence of water vapor.** Extinguishing media Suitable extinguishing media **Use fire fighting methods and materials that are appropriate for surrounding fire.**

Protection of firefighters Protective equipment for firefighters **Fire fighters should wear NIOSH approved, positive pressure, self-contained breathing apparatus and full protective clothing when appropriate.**  

### 6. Accidental Release Measures Personal precautions **Avoid contact with skin and eyes.** Environmental precautions **Not applicable** Spill or leak procedure **Avoid generating dust. Use dry cleanup procedures. Pick up mechanically.**
**Do not allow to enter drains, sewers or watercourses.** Evacuation procedures **Not applicable** Methods for cleaning up **Not available.** 

### 7. Handling and Storage Handling **Avoid contact with skin and eyes. Avoid generating dust. Wet bath should not be added to an aluminum reduction cell.**  Storage **Keep material dry. Do not store outside unless covered and protected against precipitation.** 

### 8. Exposure Controls / Personal Protection Engineering controls **Use with adequate ventilation to meet the limits listed in Section 8.** Exposure data Compounds Formed During Processing

ACGIH - Threshold Limit Values - Skin Notations Hydrogen fluoride (7664-39-3) Skin - potential significant contribution to overall exposure by the cutaneous route

U.S. - OSHA Occupational exposure limits

Components Type Value Form **Cryolite (Trisodium hexafluoroaluminate) (13775-53-6) 2.5 mg/m3 (as F) TWA**  Compounds Formed During Processing Type Value Form **Hydrogen fluoride (7664-39-3) 3 ppm (as F)**  **TWA**

Material name: SYNTHETIC CRYOLITE 0189 Version #: 09 Print date: 07-18-2011 ALCOA MSDS US 2 / 7Alcoa

Components Type Value Form **Cryolite (Trisodium hexafluoroaluminate) (13775-53-6) 0.5 mg/m3 (as F) TWA**  Compounds Formed During Processing Type Value Form **Hydrogen fluoride (7664-39-3) 2 ppm (as F)**  **STEL 1.64 mg/m3 (as F)**  **0.5 mg/m3 (8 Hour) TWA**  ACGIH Components Type Value Form **Cryolite (Trisodium hexafluoroaluminate) (13775-53-6) 2.5 mg/m3 (as F) TWA**  Compounds Formed During Processing Type Value Form **Hydrogen fluoride (7664-39-3) 2 ppm (as F)**  **Ceiling 0.5 ppm (as F)**  **TWA** Personal protective equipment Eye / face protection **Wear safety glasses with side shields. Use tight fitting goggles if excessive levels of dust are generated.**  Skin protection **Wear appropriate gloves to avoid any skin contact.** Respiratory protection **Use NIOSH-approved respiratory protection as specified by an Industrial Hygienist or other qualified professional if concentrations exceed the limits listed in Section 8. Suggested respiratory**  **protection: N95, Acid gas cartridge for Hydrogen fluoride gas.** 

### 9. Physical & Chemical Properties

Form **Solid, granular to powder.** Color **Light brown.** Boiling point **Not determined** Melting point **1832 °F (1000 °C)** Flash point **Not applicable** Auto-ignition temperature **Not applicable** Flammability limits in air, lower, % by volume **Not applicable**

Flammability limits in air, upper, % by volume **Not applicable**

Vapor pressure **Not applicable** Vapor density **Not applicable** Solubility (water) **0.6 g/l** Density **1.09 - 1.12 g/cm3 (0.039 - 0.040 lb/in3)** pH **Not applicable** Odor **Odorless** Partition coefficient (n-octanol/water) **Not applicable**



### 10. Chemical Stability & Reactivity Information Chemical stability **Stable under normal conditions of use, storage, and transportation.** Conditions to avoid **Heat and moisture.** Incompatible materials **Strong acids** Hazardous decomposition products **Hydrogen fluoride**

Possibility of hazardous reactions **Contact with strong acids releases hydrogen fluoride. Hydrogen fluoride gas can be evolved above 930°F (500°C) in the presence of water vapor.**  Hazardous polymerization **Will not occur.**

Material name: SYNTHETIC CRYOLITE 0189 Version #: 09 Print date: 07-18-2011 ALCOA MSDS US 3 / 7

### 11. Toxicological Information

Health effects associated with ingredients **Cryolite: Can cause irritation of eyes, mucous membranes, skin and upper respiratory tract. Chronic overexposures: Associated with asthma. Can cause fluoride deposition in bones and cartilage (fluorosis) as evidenced by x-ray changes and can be**  **accompanied by stiffness of the joints. May cause harm to breastfed babies.**
**Fluorides: Can cause irritation of eyes, mucous membranes, skin and respiratory tract. Chronic overexposures: Associated with asthma. Can cause fluoride deposition in bones and cartilage (fluorosis) as evidenced by x-ray changes and can be accompanied**  **by stiffness of the joints. May cause harm to breastfed babies.**
**Alumina (aluminum oxide): Low health risk by inhalation. Generally considered to be biologically inert.**

Health effects associated with compounds formed dur ing processing **Can generate the following when heated to decomposition:**
**Hydrogen fluoride: Can cause severe irritation of the eyes, mucous membranes, skin and respiratory tract. Acute overexposures: Can cause cough, shock, the accumulation of fluid in the lungs (pulmonary edema) and death. Effects can be delayed up to 24**  **hours.**

Component analysis - LD50 **No information available for product.**

Components
Toxicology Data - Selected LD50s and LC50s Cryolite (Trisodium hexafluoroaluminate) (13775-53-6) Oral LD50 Rat >1600 mg/kg; Dermal LD50 Rat >2000 mg/kg Compounds Formed During Processing
Toxicology Data - Selected LD50s and LC50s Hydrogen fluoride (7664-39-3) Inhalation LC50 Rat 850 mg/m3 1 h; Inhalation LC50 Rat 1276 ppm 1 h Carcinogenicity **Not applicable.**

Components
ACGIH - Threshold Limit Values - Carcinogens Cryolite (Trisodium hexafluoroaluminate) (13775-53-6) A4 - Not Classifiable as a Human Carcinogen 

### 12. Ecological Information
Ecotoxicity Components
Ecotoxicity - Freshwater Algae - Acute Toxicity Dat a Cryolite (Trisodium hexafluoroaluminate) (13775-53-6) 72 Hr EC50 Selenastrum capricornutum: 8.8 mg/L Ecotoxicity - Freshwater Fish - Acute Toxicity Data Cryolite (Trisodium hexafluoroaluminate) (13775-53-6) 96 Hr LC50 Brachydanio rerio: >100 mg/L Ecotoxicity - Water Flea - Acute Toxicity Data Cryolite (Trisodium hexafluoroaluminate) (13775-53-6) 48 Hr EC50 Daphnia pulex: 5 mg/L; 48 Hr Daphnia magna: 156 mg/L Compounds Formed During Processing
Ecotoxicity - Freshwater Fish - Acute Toxicity Data Hydrogen fluoride (7664-39-3) 48 Hr LC50 Leuciscus idus: 660 mg/L Ecotoxicity - Water Flea - Acute Toxicity Data Hydrogen fluoride (7664-39-3) 48 Hr EC50 Daphnia species: 270 mg/L Environmental Fate **No data available for product.** 

### 13. Disposal Considerations Disposal instructions **Reuse or recycle material whenever possible. If reuse or recycling is not possible, disposal must be made according to local or governmental regulations.** 

Material name: SYNTHETIC CRYOLITE 0189 Version #: 09 Print date: 07-18-2011 ALCOA MSDS US 4 / 7Waste codes **RCRA Status: Not federally regulated in the U.S. if disposed of "as is." RCRA waste codes other than described here may apply depending on use of the product. Status**  **must be determined at the point of waste generation. Refer to 40 CFR 261 or state equivalent in the U.S.**  

### 14. Transport Information U.S. Department of Transportation (DOT) Basic shipping description:

**-** UN number **Not regulated** Proper shipping name

**-** Hazard class

**-** Packing group Additional description & information: **3824.90.3900** HTS **28-196-67** STCC DOT Specific Notes **• This material is regulated differently when transported to, from or within a country that is required to comply with the ADR. Refer to the destination country's version of the MSDS for transportation information.**  **• This description only applies for U.S. domestic shipment by motor, rail or vessel shipments, or U.S. domestic air if shipped under DOT regulations via UPS or FEDEX.**  **• Description may be used when not regulated domestically (e.g., US DOT, TDG Canada) and materials shipped within or between such countries via road or rail and does not involve transport by international water or air.**  **• When "Not regulated", enter the proper freight classification, MSDS Number and Product Name onto the shipping paperwork. • Transport in a dry and covered sift-proof packaging or receptacle. Outside storage during transit permitted on pads (with a base**  **of concrete or other impervious material) that are covered and have secondary containment. • Trisodium hexafluoroaluminate (Cryolite) is not listed on Table 1, Appendix A to 49 CFR 172.101, the USDOT List of Hazardous**  **Substances and Reportable Quantities. • The import/export HTS (Harmonized Tariff Schedule) code given above is the United States HTS code provided by Alcoa's**  **Customs Compliance Office in Knoxville, TN. Other country specific HTS codes may apply. If available, more information on the HTS codes will be provided on country specific Material Safety Data Sheets.**  U.S. Department of Transportation (DOT) Alternate Basic Shipping Description #1 Basic shipping description: **UN3077** UN number **Environmentally hazardous substance, solid, n.o.s.** Proper shipping name **9** Hazard class **III** Packing group Additional description & information: **TRISODIUM HEXAFLUOROALUMINATE** Technical name **Marine Pollutant (EHS-aquatic environment)** Marine pollutant **2826.30.0000** HTS **(To be determined)** STCC Notes for Alternate DOT Description **• Applies to shipments to, from and within countries regulated by European Agreement concerning Carriage of Dangerous Goods by Road (ADR) according to Chapter 2.2.9.1.10. This mixture has been designated as N: Dangerous to the Environment and**  **further classified as R51/53: Toxic to aquatic organisms and may cause long-term adverse effects in the aquatic environment. IBC08, UN packaging (e.g. flexible, lined Super Sacks®) authorized.**  **• Applies to international shipments when transported by air or water as the material is a Marine Pollutant according to the IMDG (2.9.3) and an Environmentally Hazardous Substance (aquatic environment) per the UN Model Regulations (2.9.3).**  **• Material is regulated as an Environmentally Hazardous Substance (aquatic environment) according to the ADRs (2.2.9.1.10.5.2) and a Marine Pollutant according to the IMDG (2.9.3). As such packages and transport units must display the Environmentally**  **Hazardous Substance mark according to ADR 5.2.1.8 and 5.3.6, which are identical to the Marine Pollutant mark identified in the IMDG code (IMDG 5.2.1.6 and 5.3.2.3).**  **• For packaging (including IBCs), the EHS "mark" is 100mm x 100mm (same size as danger labels). For Cargo Transport Units, the EHS "mark" is 250mm x 250mm (same size as placards.) See ADR 5.2.1.8.3 for "labeling" requirements and ADR 5.3.6 for**  **placarding/marking type requirements of the EHS "mark".**
IATA Notes **• This classification may be used for International Air Transportation Association (IATA) and International Civil Aviation Organization (ICAO) international air shipments. Packaging Instruction 911 applies.** 

Material name: SYNTHETIC CRYOLITE 0189 Version #: 09 Print date: 07-18-2011 ALCOA MSDS US 5 / 7IMDG Notes

**• The words "MARINE POLLUTANT" must supplement the proper shipping name on transport document as indicated in International Maritime Dangerous Goods code (IMDG) 5.4.1.4.3.6. for international carriage by vessel.**  **• IBCs need to be "marked" on two opposing sides with the Proper shipping name and technical name in addition to the UN number markings (IMDG 5.2.1).**  

### 15. Regulatory Information US federal regulations **In reference to Title VI of the Clean Air Act of 1990, this material does not contain nor was it manufactured using ozone-depleting chemicals.**  State regulations Components

U.S. - Minnesota - Hazardous Substance List Cryolite (Trisodium hexafluoroaluminate) (13775-53-6) Present (dust) U.S. - New Jersey - Right to Know Hazardous Substan ce List Cryolite (Trisodium hexafluoroaluminate) (13775-53-6) sn 0936 U.S. - Pennsylvania - RTK (Right to Know) List Cryolite (Trisodium hexafluoroaluminate) (13775-53-6) Present (dust) Superfund Amendments and Reauthorization Act of 198 6 (SARA) Hazard categories **Immediate Hazard - No Delayed Hazard - Yes**  **Fire Hazard - No Pressure Hazard - No**  **Reactivity Hazard - No** Inventory status Country(s) or region Inventory name On inventory (yes/no)* **Yes Australia Australian Inventory of Chemical Substances (AICS)**  **Yes Canada Domestic Substances List (DSL)**  **No Canada Non-Domestic Substances List (NDSL)**  **Yes China Inventory of Existing Chemical Substances in China (IECSC)**  **Yes Europe European Inventory of New and Existing Chemicals (EINECS)**  **No Europe European List of Notified Chemical Substances (ELINCS)**  **Yes Japan Inventory of Existing and New Chemical Substances (ENCS)**  **Yes Korea Existing Chemicals List (ECL)**  **No New Zealand New Zealand Inventory**  **Yes Philippines Philippine Inventory of Chemicals and Chemical Substances**  **(PICCS) Yes**  **United States & Puerto Rico Toxic Substances Control Act (TSCA) Inventory**  A "Yes" indicates that all components of this product comply with the inventory requirements administered by the governing country(s) 

### 16. Other Information MSDS History **Origination date: June 28, 1981 Supersedes: October 5, 2010**  **Revision date: July 18, 2011**

MSDS Status **July 18, 2011: Change(s) in Section: 1, 2, 8, 10 and Exposure Scenarios. October 5, 2010: Change(s) in Section: 1, 2, 3, 8 and 11.**  **April 6, 2010: Change(s) in Section: 2, 4, 11, 12 and 14. February 26, 2010: New format.**  **March 3, 2009: New format:. February 14, 2006: Change(s) in Section: 1, 3, 4, 8, 11 and 15.**  **March 18, 2003: Reviewed on a periodic basis in accordance with Alcoa policy. Change(s) in Section: Product label, Replaces Eastalco Aluminum Company MSDS for "Bath (Synthetic Cryolite)"**  Prepared By **Hazardous Materials Control Committee Preparer: Jim Perriello, +1-480-278-6928/Jon N. Peace, +1-412-553-2293**  MSDS System Number **147522**

Material name: SYNTHETIC CRYOLITE 0189 Version #: 09 Print date: 07-18-2011 ALCOA MSDS US 6 / 7Other information

**• Guide to Occupational Exposure Values 2010, Compiled by the American Conference of Governmental Industrial Hygienists (ACGIH).**  **• NIOSH Pocket Guide to Chemical Hazards, U.S. Department of Health and Human Services, September 2005. • expub, Expert Publishing, LLC., www.expub.com**  **Key/Legend: ACGIH American Conference of Governmental Industrial Hygienists**  **AICS Australian Inventory of Chemical Substances CAS Chemical Abstract Services**  **CERCLA Comprehensive Environmental Response, Compensation, and Liability Act CFR Code of Federal Regulations**  **CPR Cardio-pulmonary Resuscitation DOT Department of Transportation**  **DSL Domestic Substances List (Canada) EC Effective Concentration**  **ED Effective Dose EINECS European Inventory of Existing Commercial Chemical Substances**  **ENCS Japan - Existing and New Chemical Substances EWC European Waste Catalogue**  **EPA Environmental Protective Agency IARC International Agency for Research on Cancer**  **LC Lethal Concentration LD Lethal Dose**  **MAK Maximum Workplace Concentration (Germany) "maximale Arbeitsplatz-Konzentration" NDSL Non-Domestic Substances List (Canada)**  **NIOSH National Institute for Occupational Safety and Health NTP National Toxicology Program**  **OEL Occupational Exposure Limit OSHA Occupational Safety and Health Administration**  **PIN Product Identification Number PMCC Pensky Marten Closed Cup**  **RCRA Resource Conservation and Recovery Act SARA Superfund Amendments and Reauthorization Act**  **SIMDUT Système d'Information sur les Matières Dangereuses Utilisées au Travail STEL Short Term Exposure Limit**  **TCLP Toxic Chemicals Leachate Program TDG Transportation of Dangerous Goods**  **TLV Threshold Limit Value TSCA Toxic Substances Control Act**  **TWA Time Weighted Average WHMIS Workplace Hazardous Materials Information System**  **m meter, cm centimeter, mm millimeter, in inch, g gram, kg kilogram, lb pound, μg microgram,**  **ppm parts per million, ft feet**

***** End of MSDS ***** Disclaimer **The information in the sheet was written based on the best knowledge and experience currently available.** 

Material name: SYNTHETIC CRYOLITE 0189 Version #: 09 Print date: 07-18-2011 ALCOA MSDS US 7 / 7SYNTHETIC CRYOLITEWARNINGNon-combustible. Not an explosion hazard.Direct contact: Can cause irritation of the eyes and skin. Dust: Can cause irritation of the upper respiratory tract. Chronic overexposures: Can cause fluoridedeposition in bones and cartilage. Associated with asthma.Additional health effects from elevated temperature processing (e.g., if heated to decomposition): Vapors: Can cause severe irritation of the respiratory tract.Acute overexposures: Can cause the accumulation of fluid in the lungs. Effects can be delayed up to 24 hours.FIRST AIDIf swallowed, dilute by drinking water. Recommend quantities up to 30 mL (~1oz.) in children and 250 mL (~9 oz.) in adults. Never give anything by mouth toa victim who is unconscious or is having convulsions. Do NOT induce vomiting.Call a physician immediately.IngestionWash with soap and water for at least 15 minutes. Get medical attention ifirritation develops or persists.Skin contactRemove to fresh air. Check for clear airway, breathing, and presence of pulse. Ifbreathing is difficult, provide oxygen. Loosen any tight clothing on neck or chest.Provide cardiopulmonary resuscitation for persons without pulse or respirations.Consult a physician.InhalationRinse eyes with plenty of water or saline for at least 15 minutes. Consult aphysician.Eye contactFIRE FIGHTINGUse fire fighting methods and materials that are appropriate for surrounding fire.Suitableextinguishing mediaSPILL PROCEDURESAvoid generating dust. Use dry cleanup procedures. Pick up mechanically.Do not allow to enter drains, sewers or watercourses.Spill or leakprocedureHANDLING AND STORAGEAvoid contact with skin and eyes. Avoid generating dust. Wet bath should notbe added to an aluminum reduction cell.HandlingKeep material dry. Do not store outside unless covered and protected againstprecipitation.StorageSee Alcoa Material Safety Data Sheet No. 189 for more information about use and disposal.Emergency Phone: +1-412-553-4001.Contains:Cryolite (Trisodium hexafluoroaluminate) 13775-53-6Alcoa Inc.201 Isabella Street, Pittsburgh PA 15212-5858 United States7/11