Gadolinium oxide (Gd2O3) | SDS | CAS 12064-62-9 | Materion | English | 08-05-2025

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SAFETY DATA SHEET

1. Identification

Product identifier Gadolinium Oxide (Gd2O3)

Other means of identification SDS number 1JU

Materion Code 1JU

CAS number 12064-62-9

Synonyms Gadolinum oxide * Gadolinium oxide (Gd2O3) * Digadolinium trioxide * GADOLINIUM (III) OXIDE

Manufacturer/Importer/Supplier/Distributor information Manufacturer

Company name Materion Corporation Address 6070 Parkland Boulevard Mayfield Heights, Ohio 44124 United States

Telephone 1.216.383.4019 Website www.materion.com E-mail Materion-PS@materion.com Contact person Product Stewardship Director Emergency phone See Section 16. number

2. Hazard(s) identification

Physical hazards Not classified.

Health hazards Serious eye damage/eye irritation Category 2A

Environmental hazards Not classified.

OSHA defined hazards Not classified.

Label elements

Signal word Warning

Hazard statement The material as sold in solid form is generally not considered hazardous. However, if the process involves grinding, melting, cutting or any other process that causes a release of dust or fumes, hazardous levels of airborne particulate could be generated. Causes serious eye irritation.

Precautionary statement Prevention Wash thoroughly after handling. Wear eye protection/face protection.

Response If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice/attention. Take off contaminated clothing and wash it before reuse.

Storage Store away from incompatible materials.

Disposal Dispose of contents/container in accordance with local/regional/national/international regulations.

Hazard(s) not otherwise None known. classified (HNOC)

Material name: Gadolinium Oxide (Gd2O3) SDS US 1JU Version #: 05 Revision date: 08-05-2025 Issue date: 08-28-2014 1 / 6

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Supplemental information For further information, please contact the Product Stewardship Department at +1.216.383.4019.

3. Composition/information on ingredients

Substances

Chemical name Common name and synonyms CAS number %

Gadolinium Oxide Gadolinum oxide 12064-62-9 100 Gadolinium oxide (Gd2O3) Digadolinium trioxide GADOLINIUM (III) OXIDE

*Designates that a specific chemical identity and/or percentage of composition has been withheld as a trade secret.

4. First-aid measures

Inhalation Move to fresh air. If breathing stops, provide artificial respiration. Call a physician if symptoms develop or persist. Get medical attention.

Skin contact Wash off with soap and water. Get medical attention if irritation develops and persists.

Eye contact Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Immediately flush eyes with plenty of water for at least 15 minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Get medical attention if irritation develops and persists.

Ingestion Rinse mouth. Do not induce vomiting. Get medical attention if symptoms occur. Get medical attention.

Most important Severe eye irritation. Symptoms may include stinging, tearing, redness, swelling, and blurred symptoms/effects, acute vision. and delayed

Indication of immediate Provide general supportive measures and treat symptomatically. Keep victim under observation. medical attention and Symptoms may be delayed. special treatment needed

General information Ensure that medical personnel are aware of the material(s) involved, and take precautions to protect themselves.

5. Fire-fighting measures

Suitable extinguishing Water fog. Foam. Dry chemical powder. Carbon dioxide (CO2). media

Unsuitable extinguishing None known. media

Specific hazards arising During fire, gases hazardous to health may be formed. from the chemical

Special protective Wear suitable protective equipment. equipment and precautions for firefighters

Fire fighting Use water spray to cool unopened containers. equipment/instructions

Specific methods Use standard firefighting procedures and consider the hazards of other involved materials.

General fire hazards No unusual fire or explosion hazards noted.

6. Accidental release measures

Personal precautions, Keep unnecessary personnel away. Wear appropriate protective equipment and clothing during protective equipment and clean-up. Do not touch damaged containers or spilled material unless wearing appropriate emergency procedures protective clothing. Local authorities should be advised if significant spillages cannot be contained. For personal protection, see section 8 of the SDS.

Methods and materials for Clean up in accordance with all applicable regulations. containment and cleaning up

Environmental precautions No special environmental precautions required.

Material name: Gadolinium Oxide (Gd2O3) SDS US 1JU Version #: 05 Revision date: 08-05-2025 Issue date: 08-28-2014 2 / 6

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7. Handling and storage

Precautions for safe Provide adequate ventilation. Wear appropriate personal protective equipment. Observe good handling industrial hygiene practices. Use care in handling/storage.

Conditions for safe storage, Store in tightly closed container. Store away from incompatible materials (see Section 10 of the including any SDS). incompatibilities

8. Exposure controls/personal protection

Occupational exposure This substance has no PEL, TLV, or other recommended exposure limit. limits

Biological limit values No biological exposure limits noted for the ingredient(s).

Appropriate engineering Good general ventilation should be used. Ventilation rates should be matched to conditions. If controls applicable, use process enclosures, local exhaust ventilation, or other engineering controls to maintain airborne levels below recommended exposure limits. If exposure limits have not been established, maintain airborne levels to an acceptable level. Provide eyewash station.

Individual protection measures, such as personal protective equipment Eye/face protection Wear safety glasses with side shields (or goggles).

Skin protection Hand protection Wear protective gloves.

Other Not available.

Respiratory protection In case of insufficient ventilation, wear suitable respiratory equipment.

Thermal hazards Wear appropriate thermal protective clothing, when necessary.

General hygiene Always observe good personal hygiene measures, such as washing after handling the material considerations and before eating, drinking, and/or smoking. Routinely wash work clothing and protective equipment to remove contaminants.

9. Physical and chemical properties

Appearance

Physical state Solid.

Form Solid.

Color Not available.

Odor Not available.

Odor threshold Not available.

pH Not available.

Melting point/freezing point Not available.

Initial boiling point and Not available. boiling range

Flash point Not available.

Evaporation rate Not available.

Flammability (solid, gas) Not available.

Upper/lower flammability or explosive limits Explosive limit - lower Not available. (%)

Explosive limit - upper Not available. (%)

Vapor pressure Not available.

Vapor density Not available.

Relative density Not available.

Material name: Gadolinium Oxide (Gd2O3) SDS US 1JU Version #: 05 Revision date: 08-05-2025 Issue date: 08-28-2014 3 / 6

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Solubility(ies) Solubility (water) Not available.

Partition coefficient Not available. (n-octanol/water)

Auto-ignition temperature Not available.

Decomposition temperature Not available.

Viscosity Not available.

Other information Explosive properties Not explosive.

Molecular formula Gd2O3

Oxidizing properties Not oxidizing.

10. Stability and reactivity

Reactivity The product is stable and non-reactive under normal conditions of use, storage and transport.

Chemical stability Material is stable under normal conditions.

Possibility of hazardous No dangerous reaction known under conditions of normal use. reactions

Conditions to avoid Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. Contact with incompatible materials.

Incompatible materials None known.

Hazardous decomposition No hazardous decomposition products are known. products

11. Toxicological information

Information on likely routes of exposure Inhalation Due to lack of data the classification is not possible.

Skin contact Due to lack of data the classification is not possible.

Eye contact Causes serious eye irritation.

Ingestion Due to lack of data the classification is not possible.

Symptoms related to the Severe eye irritation. Symptoms may include stinging, tearing, redness, swelling, and blurred physical, chemical and vision. toxicological characteristics

Information on toxicological effects

Acute toxicity Not available.

Skin corrosion/irritation Due to lack of data the classification is not possible.

Serious eye damage/eye Causes serious eye irritation. irritation

Respiratory or skin sensitization Respiratory Due to lack of data the classification is not possible. sensitization

Skin sensitization Due to lack of data the classification is not possible.

Germ cell mutagenicity Due to lack of data the classification is not possible.

Carcinogenicity This product is not considered to be a carcinogen by IARC, ACGIH, NTP, or OSHA.

IARC Monographs. Overall Evaluation of Carcinogenicity

Not listed. OSHA Specifically Regulated Substances (29 CFR 1910.1001-1053)

Not listed. US. National Toxicology Program (NTP) Report on Carcinogens

Not listed.

Material name: Gadolinium Oxide (Gd2O3) SDS US 1JU Version #: 05 Revision date: 08-05-2025 Issue date: 08-28-2014 4 / 6

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Reproductive toxicity Due to lack of data the classification is not possible.

Specific target organ Due to lack of data the classification is not possible. toxicity - single exposure

Specific target organ Due to lack of data the classification is not possible. toxicity - repeated exposure

Aspiration hazard Due to lack of data the classification is not possible.

12. Ecological information

Ecotoxicity The product is not classified as environmentally hazardous. However, this does not exclude the possibility that large or frequent spills can have a harmful or damaging effect on the environment.

Persistence and No data is available on the degradability of this product. degradability

Bioaccumulative potential No data available.

Mobility in soil No data available.

Other adverse effects No other adverse environmental effects (e.g. ozone depletion, photochemical ozone creation potential, endocrine disruption, global warming potential) are expected from this component.

13. Disposal considerations

Disposal instructions Collect and reclaim or dispose in sealed containers at licensed waste disposal site. Dispose of contents/container in accordance with local/regional/national/international regulations.

Local disposal regulations Dispose in accordance with all applicable regulations.

Hazardous waste code The waste code should be assigned in discussion between the user, the producer and the waste disposal company.

Waste from residues / Dispose of in accordance with local regulations. Empty containers or liners may retain some unused products product residues. This material and its container must be disposed of in a safe manner (see: Disposal instructions). Empty containers or liners may retain some product residues. This material and its container must be disposed of in a safe manner.

Contaminated packaging Empty containers should be taken to an approved waste handling site for recycling or disposal.

14. Transport information

DOT

Not regulated as dangerous goods.

IATA

Not regulated as dangerous goods.

IMDG

Not regulated as dangerous goods.

15. Regulatory information

US federal regulations All components are on the U.S. EPA TSCA Inventory List. This product is a "Hazardous Chemical" as defined by the OSHA Hazard Communication Standard, 29 CFR 1910.1200. CERCLA/SARA Hazardous Substances - Not applicable.

Toxic Substances Control Act (TSCA)

TSCA Section 12(b) Export Notification (40 CFR 707, Subpt. D)

Not regulated.

CERCLA Hazardous Substance List (40 CFR 302.4)

Not listed. SARA 304 Emergency release notification

Not regulated. OSHA Specifically Regulated Substances (29 CFR 1910.1001-1053)

Not listed.

Material name: Gadolinium Oxide (Gd2O3) SDS US 1JU Version #: 05 Revision date: 08-05-2025 Issue date: 08-28-2014 5 / 6

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Superfund Amendments and Reauthorization Act of 1986 (SARA) SARA 302 Extremely hazardous substance

Not listed.

SARA 311/312 Yes Hazardous chemical

Classified hazard Serious eye damage or eye irritation categories

SARA 313 (TRI reporting) Not regulated.

Other federal regulations

Clean Air Act (CAA) Section 112 Hazardous Air Pollutants (HAPs) List

Not regulated. Clean Air Act (CAA) Section 112(r) Accidental Release Prevention (40 CFR 68.130)

Not regulated.

Safe Drinking Water Act Not regulated. (SDWA)

US state regulations California Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65): This material is not known to contain any chemicals currently listed as carcinogens or reproductive toxins.

California Proposition 65

California Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65): This material is not known to contain any chemicals currently listed as carcinogens or reproductive toxins. For more information go to www.P65Warnings.ca.gov.

16. Other information, including date of preparation or last revision

Issue date 08-28-2014

Revision date 08-05-2025

Version # 05

Disclaimer This document has been prepared using data from sources considered to be technically reliable and the information is believed to be correct. Materion makes no warranties, expressed or implied, as to the accuracy of the information contained herein. Materion cannot anticipate all conditions under which this information and its products may be used and the actual conditions of use are beyond its control. The user is responsible to evaluate all available information when using this product for any particular use and to comply with all Federal, State, Provincial and Local laws, statutes and regulations.

Revision information This document has undergone significant changes and should be reviewed in its entirety.

Material name: Gadolinium Oxide (Gd2O3) SDS US 1JU Version #: 05 Revision date: 08-05-2025 Issue date: 08-28-2014 6 / 6

Gadolinium oxide (Gd2O3) | SDS | CAS 12064-62-9 | Materion | English | 08-05-2025

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Full document text

Page 1

1. Identification

2. Hazard(s) identification

Page 2

3. Composition/information on ingredients

4. First-aid measures

5. Fire-fighting measures

6. Accidental release measures

Page 3

7. Handling and storage

8. Exposure controls/personal protection

9. Physical and chemical properties

Page 4

10. Stability and reactivity

11. Toxicological information

Page 5

12. Ecological information

13. Disposal considerations

14. Transport information

15. Regulatory information

Page 6

16. Other information, including date of preparation or last revision