Invar Powder







Product Name:   Invar® Powder

Supplier:             ESPI Metals

                            1050 Benson Way

                            Ashland, OR 97520

Telephone:          800-638-2581

Fax:                     541-488-8313

Email:                  This email address is being protected from spambots. You need JavaScript enabled to view it.

Emergency:         Infotrac 800-535-5053 (US) or 352-323-3500 (24 hour)

Recommended Uses:   Scientific Research




GHS Classification (29 CFR 1910.1200): Sensitization - skin, category 1B,  Carcinogenicity, category 2.

GHS Label Elements:

pictogramexclamationmark   pictogramhealthhazard

Signal Word: Warning

Hazard Statements: H317  May cause an allergic skin reaction,  H351  Suspected of causing cancer.

Precautionary Statements: P201  Obtain special instructions before use,  P202  Do not handle until all safety precautions have been read and understood,  P261  Avoid breathing dust or fume,  P272  Contaminated clothing should  not be allowed out of the workplace,  P280  Wear protective gloves/protective clothing,  P302+P352  IF ON SKIN: wash with plenty of soap and water,  P333+P313  If skin irritation or rash occurs: Get medical advice/attention,  P308+P313  IF exposed or concerned: Get medical advice/attention,  P363  Wash contaminated clothing before reuse,  P405  Store locked up,  P501  Dispose of contents/container in accordance with local, state or federal regulations.




Ingredient:          CAS#:                 %:               EC#:

Iron                      7439-89-6            Bal.             231-096-4

Nickel                   7440-02-0           35-38            231-111-4

Common Names and Synonyms:  Invar 36, Iron-Nickel Alloy 36, Low Expansion Alloy




General Measures: Remove patient from area of exposure.

INHALATION: Remove to fresh air, keep warm and quiet, give oxygen if breathing is difficult. Seek medical attention.

INGESTION: Rinse mouth with water. Do not induce vomiting. Seek medical attention. Never induce vomiting or give anything by  mouth to an unconscious person.

SKIN: Remove contaminated clothing, brush material off skin, wash affected area with soap and water. Seek medical attention if symptoms persist.

EYES: Flush eyes with lukewarm water, including under upper and lower eyelids, for at least 15 minutes. Seek medical attention if symptoms persist.

Most Important Symptoms/Effects, Acute and Delayed: May cause irritation. See section 11 for more information.

Indication of Immediate Medical Attention and Special Treatment: No other relevant information available.




Extinguishing Media: Use Class D dry powder extinguishing agent.

Unsuitable Extinguishing Media: Do not use water.

Specific Hazards Arising from the Material: Fine dust dispersed in air in sufficient concentrations, and in the presence of an ignition source, is a potential dust explosion hazard. May emit toxic metal oxide fumes under fire conditions.

Special Protective Equipment and Precautions for Firefighters: Full face, self-contained breathing apparatus and full protective clothing when necessary.




Personal Precautions, Protective Equipment, and Emergency Procedures: Wear appropriate respiratory and protective equipment specified in section 8. Isolate spill area and provide ventilation. Avoid breathing dust or fume. Avoid contact with skin and eyes. Eliminate all sources of ignition.

Methods and Materials for Containment and Cleaning Up: Avoid dust formation. Sweep or scoop up. Place in a properly labeled container for further handling and disposal.

Environmental Precautions: Do not allow to enter drains or to be released to the environment.




Precautions for Safe Handling: Avoid creating dust. Avoid breathing dust or fumes. Provide adequate ventilation if dusts are created. Avoid contact with skin and eyes. Wash thoroughly before eating or smoking. See section 8 for information on personal protection equipment.

Conditions for Safe Storage: Store in a cool, dry area. Store material tightly sealed in properly labeled containers. See section 10 for more information on incompatible materials.




Exposure Limits:      OSHA/PEL:                               ACGIH/TLV:

Nickel                        1 mg/m3                                    1.5 mg/m3

Iron                           No exposure limit established       No exposure limit established

Engineering Controls: Handle in a controlled, enclosed environment. Ensure adequate ventilation to maintain exposures below occupational limits. Whenever possible the use of local exhaust ventilation or other engineering controls is the preferred method of controlling exposure to airborne dust and fume to meet established occupational exposure limits. Use good housekeeping and sanitation practices. Do not use tobacco or food in work area. Wash thoroughly before eating or smoking. Do not blow dust off clothing or skin with compressed air.

Individual Protection Measures, Such as Personal Protective Equipment:

  Respiratory Protection: Use NIOSH approved respirator.

  Eye Protection: Safety glasses

  Skin Protection: Wear impermeable gloves; protective work clothing as necessary.





  Form:                  Powder

  Color:                  Gray

Odor:                     Odorless

Odor Threshold:   Not determined

pH:                                               N/A

Melting Point:                              ~1425 oC

Boiling Point:                               No data

Flash Point:                                 N/A

Evaporation Rate:                       N/A

Flammability:                              No data

Upper Flammable Limit:             No data

Lower Flammable Limit:             No data

Vapor Pressure:                          No data

Vapor Density:                             N/A

Relative Density (Specific Gravity):     ~8.1 g/cc

Solubility in H2O:                         Insoluble

Partition Coefficient (n-octanol/water):   Not determined

Autoignition Temperature:         No data

Decomposition Temperature:     No data

Viscosity:                                     N/A




Reactivity: No specific test data available.

Chemical Stability: Stable under recommended storage conditions.

Possibility of Hazardous Reactions: Reacts with strong acids and caustics to form flammable and explosive hydrogen gas. Contact with sulfur may cause evolution of heat. Contact with halogenated compounds and oxidizers may produce violent reactions and fires. Hazardous polymerization will not occur.

Conditions to Avoid: Avoid creating a dust cloud.

Incompatible Materials: Oxidizers, strong acids, halogenated compounds.

Hazardous Decomposition Products: Metal oxides, carbon oxides, nitrogen oxides.




Likely Routes of Exposure: Inhalation, skin, eyes.

Symptoms of Exposure: Fines/dusts may irritate lungs, eyes or abraded skin. Inhalation of metal oxide fumes due to heating beyond the boiling point in an oxidizing atmosphere, such as when smelting or welding, may cause substernal chest pain, cough, dyspnea and flu-like symptoms. The respiratory symptoms generally disappear in the exposed individual within 1-4 days.

Acute and Chronic Effects:

Nickel:  The most common harmful health effect of metallic nickel in humans is an allergic skin reaction in those who are sensitive to nickel. Although nickel compounds are known human carcinogens, the evidence suggests that the relatively insoluble metallic nickel is less likely to present a carcinogenic hazard than are the nickel compounds that tend to release proportionately more nickel ion.

Iron:  If inhaled, iron is a local irritant to the lung and gastrointestinal tract. Inhalation of large amounts may cause iron pneumoconiosis. Chronic inhalation of finely divided powder may cause chronic iron poisoning and pathological deposition of iron in the body tissue. Ingestion may cause vomiting, diarrhea, pink urine, black stool, and liver damage.

Acute Toxicity: No available information


NickelNTP:  R - reasonably anticipated to be a human carcinogen    IARC:  2B - possibly carcinogenic to humans

To the best of our knowledge the chemical, physical and toxicological characteristics of the substance are not fully known.




Ecotoxicity: No data

Persistence and Degradability: No data

Bioaccumulative Potential: No data

Mobility in Soil: No data

Other Adverse Effects: No further relevant information available.




Waste Disposal Method:

Product: Dispose of in accordance with Federal, State and Local regulations.

Packaging: Dispose of in accordance with Federal, State and Local regulations.




Shipping Regulations:  Not regulated

   UN Number:                           N/A

   UN Proper Shipping Name:   N/A

   Transport Hazard Class:       N/A

   Packing Group:                      N/A

   Marine Pollutant:                   No

Note:  Not subject to hazardous shipping requirements if transported in a non-bulk packaging. If one package contains <100 lbs of nickel; or contains a mixture (including metal alloys) containing nickel in a concentration such that there is <100 lbs of nickel in one package, it is not regulated by DOT, IATA, IMDG, ICAO.




TSCA: All components are listed.

Regulation (EC) No 1272/2008 (CLP): Sensitization - skin, category 1B,  Carcinogenicity, category 2.

WHMIS 2015 Classification: Respiratory or skin sensitization,  Carcinogenicity.

HMIS RatingsHealth:  2*(chronic)     Flammability:  1     Physical:  0

NFPA RatingsHealth:  2     Flammability:  1     Instability:  0

Chemical Safety Assessment: A chemical safety assessment has not been carried out.




The information contained in this document is based on the state of our knowledge at the time of publication and is believed to be correct, but does not purport to be all inclusive and shall be used only as a guide. ESPI Metals makes no representation, warranty, or guarantee of any kind with respect to the information contained in this document or any use of the product based on this information. ESPI Metals shall not be held liable for any damages resulting from handling or from contact with the above product. Users should satisfy themselves that they have all current data relevant to their particular use.


Prepared by:              ESPI Metals

Revised/Reviewed:    December 2015