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

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Additional 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) TWA 3 ppm (as F)

Material name: SYNTHETIC CRYOLITE

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Alcoa

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) STEL 2 ppm (as F)

1.64 mg/m3 (as F)

TWA 0.5 mg/m3 (8 Hour)

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) Ceiling 2 ppm (as F)

TWA 0.5 ppm (as F)

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.

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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 during 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 Data

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

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Waste 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 -

Proper shipping name Not regulated

Hazard class -

Packing group -

Additional description & information:

HTS 3824.90.3900

STCC 28-196-67

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:

UN number UN3077

Proper shipping name Environmentally hazardous substance, solid, n.o.s.

Hazard class 9

Packing group III

Additional description & information:

Technical name TRISODIUM HEXAFLUOROALUMINATE

Marine pollutant Marine Pollutant (EHS-aquatic environment)

HTS 2826.30.0000

STCC (To be determined)

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.

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IMDG 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 Substance 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 1986 (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)*

Australia Australian Inventory of Chemical Substances (AICS) Yes

Canada Domestic Substances List (DSL) Yes

Canada Non-Domestic Substances List (NDSL) No

China Inventory of Existing Chemical Substances in China (IECSC) Yes

Europe European Inventory of New and Existing Chemicals (EINECS) Yes

Europe European List of Notified Chemical Substances (ELINCS) No

Japan Inventory of Existing and New Chemical Substances (ENCS) Yes

Korea Existing Chemicals List (ECL) Yes

New Zealand New Zealand Inventory No

Philippines Philippine Inventory of Chemicals and Chemical Substances Yes

(PICCS)

United States & Puerto Rico Toxic Substances Control Act (TSCA) Inventory Yes

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

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Other 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

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SYNTHETIC CRYOLITE

WARNING

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. Chronic ove

deposition in bones and cartilage. Associated with asthma.

Additional health effects from elevated temperature processing (e.g., if heated to decomposition): Vapors: Can cause severe i

Acute overexposures: Can cause the accumulation of fluid in the lungs. Effects can be delayed up to 2

FIRST AID

If 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.

Ingestion

Wash with soap and water for at least 15 minutes. Get medical attention ifirritation develops or persists.

Skin contact

Remove 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.

Inhalation

Rinse eyes with plenty of water or saline for at least 15 minutes. Consult aphysician.

Eye contact

FIRE FIGHTINGSuitable Use fire fighting methods and materiaextinguishing mediaSPILL PROCEDURES

Avoid generating dust. Use dry cleanDo not allow to enter drains, sewers o

Spill or leakprocedureHANDLING AND STORAGE

Avoid contact with skin and eyes. Avobe added to an aluminum reduction c

Handling

Keep material dry. Do not store outsidprecipitation.

Storage

See Alcoa Material Safety Data Sheet No. 189 for more information about use and disposal.

Emergency Phone: +1-412-553-4001.

Contains:Cryolite (Trisodium hexafluoroaluminate) 

Alcoa Inc.201 Isabella Street, Pittsburgh PA 15212-5858 United States7/11