SIGMA-ALDRICH



                         Material Safety Data Sheet



                                                 Date Printed: 21/FEB/2005

                                                 Date Updated: 13/MAR/2004

                                                               Version 1.1

                                                   According to 91/155/EEC



Classified as Hazardous according to the criteria of EU Annex 1 and

NOHSC.



1 - Product and Company Information



Product Name                     CALCIUM SILICIDE

Product Number                   21240



Company                          Sigma-Aldrich Pty, Ltd

                                 Unit 2, 14 Anella Avenue

                                 Castle Hill NSW 1765

                                 Australia

Technical Phone #                +61 2 9841 0555

Fax                              +61 2 9841 0500

Emergency Phone #                +61 2 9841 0566



2 - Composition/Information on Ingredients



Product Name                           CAS #        EC no       Annex I

                                                                Index Number

CALCIUM SILICIDE                       12013-56-8   234-588-7   None



Formula             CaSi2

Molecular Weight    96.25 AMU



3 - Hazards Identification



SPECIAL INDICATION OF HAZARDS TO HUMANS AND THE ENVIRONMENT

   Contact with water liberates extremely flammable gases.





4 - First Aid Measures



AFTER INHALATION

   If inhaled, remove to fresh air. If not breathing give

   artificial respiration. If breathing is difficult, give oxygen.



AFTER SKIN CONTACT

   In case of contact, immediately wash skin with soap and copious

   amounts of water.



AFTER EYE CONTACT

   In case of contact, immediately flush eyes with copious amounts

   of water for at least 15 minutes.



AFTER INGESTION

   If swallowed, wash out mouth with water provided person is

   conscious. Call a physician.



5 - Fire Fighting Measures



CONDITIONS OF FLAMMABILITY

   Reacts with water to liberate flammable and/or explosive gas.

EXTINGUISHING MEDIA

   Suitable: Carbon dioxide, dry chemical powder, or appropriate

   foam.

   Unsuitable: Do not use water.



SPECIAL RISKS

   Specific Hazard(s): Emits toxic fumes under fire conditions.

   Flammable solid.



SPECIAL PROTECTIVE EQUIPMENT FOR FIREFIGHTERS

   Wear self-contained breathing apparatus and protective clothing

   to prevent contact with skin and eyes.



6 - Accidental Release Measures



PROCEDURE(S) OF PERSONAL PRECAUTION(S)

   Wear respirator, chemical safety goggles, rubber boots, and

   heavy rubber gloves.



METHODS FOR CLEANING UP

   Sweep up, place in a bag and hold for waste disposal. Avoid

   raising dust. Ventilate area and wash spill site after material

   pickup is complete.



7 - Handling and Storage



HANDLING

   Directions for Safe Handling: Avoid inhalation. Avoid contact

   with eyes, skin, and clothing. Avoid prolonged or repeated

   exposure.



STORAGE

   Conditions of Storage: Keep tightly closed. Keep away from heat,

   sparks, and open flame. Store in a cool dry place. Store under

   nitrogen.

   Incompatible Materials: Do not allow contact with water



8 - Exposure Controls / Personal Protection



ENGINEERING CONTROLS

   Safety shower and eye bath. Mechanical exhaust required.



GENERAL HYGIENE MEASURES

   Wash contaminated clothing before reuse. Wash thoroughly after

   handling.



PERSONAL PROTECTIVE EQUIPMENT

   Respiratory Protection: Government approved respirator.

   Hand Protection: Compatible chemical-resistant gloves.

   Eye Protection: Chemical safety goggles.



9 - Physical and Chemical Properties



Appearance              Color: Grey

                        Form: Fine crystals



Property                Value                 At Temperature or Pressure



pH                      N/A

BP/BP Range             N/A

MP/MP Range             N/A





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Flash Point             N/A

Flammability            N/A

Autoignition Temp       N/A

Oxidizing Properties    N/A

Explosive Properties    N/A

Explosion Limits        N/A

Vapor Pressure          N/A

SG/Density              N/A

Partition Coefficient   N/A

Viscosity               N/A

Vapor Density           N/A

Saturated Vapor Conc.   N/A

Evaporation Rate        N/A

Bulk Density            N/A

Decomposition Temp.     N/A

Solvent Content         N/A

Water Content           N/A

Surface Tension         N/A

Conductivity            N/A

Miscellaneous Data      N/A

Solubility              N/A



10 - Stability and Reactivity



STABILITY

   Reactions to Avoid: Calcium disilicide forms a friction-sensitive

   explosive upon mixing with carbon tetrachloride. Mixing with

   alkali metal fluorides results in ignition with the formation of

   silicon tetrafluoride. Mixing with iron(III) oxide results in a

   violent thermite-like reaction producing molten iron. Contact with

   acids produces silane gas which is pyrophoric. Mixtures with

   oxidizing agents such as potassium nitrate are easily ignited and

   burn vigorously producing high temperatures. Reacts violently with:

   Materials to Avoid: Water, Strong oxidizing agents, Strong acids.



HAZARDOUS DECOMPOSITION PRODUCTS

   Hazardous Decomposition Products: Silicon oxide, Liberates

   flammable/explosive hydrogen gas.



11 - Toxicological Information



SIGNS AND SYMPTOMS OF EXPOSURE

   To the best of our knowledge, the chemical, physical, and

   toxicological properties have not been thoroughly investigated.



ROUTE OF EXPOSURE

   Skin Contact: May cause skin irritation.

   Eye Contact: May cause eye irritation.

   Multiple Routes: May be harmful by inhalation, ingestion, or

   skin absorption.



12 - Ecological Information



No data available.



13 - Disposal Considerations



SUBSTANCE DISPOSAL

   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.





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14 - Transport Information



RID/ADR

   UN#: 1405

   Class: 4.3

   PG: II

   Proper Shipping Name: Calcium silicide



IMDG

   UN#: 1405

   Class: 4.3

   PG: II

   Proper Shipping Name: Calcium silicide

   Marine Pollutant: No

   Severe Marine Pollutant: No



IATA

   UN#: 1405

   Class: 4.3

   PG: II

   Proper Shipping Name: Calcium silicide

   Inhalation Packing Group I: No



15 - Regulatory Information



CLASSIFICATION AND LABELING ACCORDING TO EU DIRECTIVES

   INDICATION OF DANGER: F

     Highly Flammable.

   R-PHRASES: 15

     Contact with water liberates extremely flammable gases.

   S-PHRASES: 8 43

     Keep container dry. In case of fire, use dry sand. Never use

     water.



16 - Other Information



WARRANTY

   The above information is believed to be correct but does not

   purport to be all inclusive and shall be used only as a guide. The

   information in this document is based on the present state of our

   knowledge and is applicable to the product with regard to

   appropriate safety precautions. It does not represent any

   guarantee of the properties of the product. Sigma-Aldrich Inc.,

   shall not be held liable for any damage resulting from handling or

   from contact with the above product. See reverse side of invoice

   or packing slip for additional terms and conditions of sale.

   Copyright 2005 Sigma-Aldrich Co. License granted to make unlimited

   paper copies for internal use only.



DISCLAIMER

   For R&D use only. Not for drug, household or other uses.









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