Praseodymium (Pr) Standard Solution | SDS | National Institute of Standards and Technology (NIST) | SRM 3142a | English | 07 January 2020

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Date of Issue: 07 January 2020 SAFETY DATA SHEET

1. SUBSTANCE AND SOURCE IDENTIFICATION Product Identifier SRM Number: 3142a SRM Name: Praseodymium (Pr) Standard Solution Other Means of Identification: Not applicable. Recommended Use of This Material and Restrictions of Use This Standard Reference Material (SRM) is intended for use as a primary calibration standard for the quantitative determination of praseodymium. A unit of SRM 3142a consists of five 10 mL sealed borosilicate glass ampoules of an acidified aqueous solution prepared gravimetrically to contain a known mass fraction of praseodymium. The solution contains nitric acid. Company Information National Institute of Standards and Technology Standard Reference Materials Program 100 Bureau Drive, Stop 2300 Gaithersburg, Maryland 20899-2300

Telephone: 301-975-2200 Emergency Telephone ChemTrec: FAX: 301-948-3730 1-800-424-9300 (North America) E-mail: SRMMSDS@nist.gov +1-703-527-3887 (International) Website: https://www.nist.gov/srm

2. HAZARDS IDENTIFICATION

Classification Physical Hazard: Not classified. Health Hazard: Skin Corrosion/Irritation Category 1B Serious Eye Damage/Eye Irritation Category 1 Label Elements Symbol

Signal Word DANGER Hazard Statement(s) H314 Causes severe skin burns and eye damage. Precautionary Statement(s) P260 Do not breathe fume/gas/mists/vapors/spray. P264 Wash hands thoroughly after handling. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301 + P330 + P331 If swallowed: Rinse mouth. Do NOT induce vomiting. P303 + P361 + P353 If on skin (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. P304 + P340 If inhaled: Remove person to fresh air and keep comfortable for breathing. P305 + P351 + P338 If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P310 Immediately call a poison center or doctor/physician. P363 Wash contaminated clothing before reuse.

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P405 Store locked up. P501 Dispose of contents according to local regulations. Hazards Not Otherwise Classified: Not applicable. Ingredients(s) with Unknown Acute Toxicity: Not applicable.

3. COMPOSITION AND INFORMATION ON HAZARDOUS INGREDIENTS

Substance: Praseodymium in nitric acid solution Other Designations: Nitric Acid (Aqua fortis; hydrogen nitrate; azotic acid; engraver’s acid) Praseodymium nitrate (Nitric acid, praseodymium (3+) salt; praseodymium trinitrate; praseodymium nitrate) NOTE: Praseodymium in nitric acid solution forms a solvated praseodymium nitrate salt. The health and physical hazard information provided in this SDS are for nitric acid and praseodymium nitrate. The actual effects of the solution may differ from the individual components. Components are listed in compliance with OSHA’s 29 CFR 1910.1200; for the actual values see the Certificate of Analysis. Hazardous Component(s) CAS Number EC Number Nominal Mass Concentration (EINECS) (%) Nitric Acid 7697-37-2 231-714-2 <20 Praseodymium Nitrate 10361-80-5 233-796-5 2.3 Non-Hazardous Component(s) Water 7732-18-5 231-791-2 >80

4. FIRST AID MEASURES

Description of First Aid Measures: Inhalation: If adverse effects occur, remove to uncontaminated area. If not breathing, give artificial respiration or oxygen by qualified personnel. Seek immediate medical attention. Skin Contact: Wash skin with soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get immediate medical attention. Thoroughly clean and dry contaminated clothing before reuse. Destroy contaminated shoes. Eye Contact: Immediately flush eyes, including under the eyelids with copious amounts of water for at least 15 minutes. Seek immediate medical attention. Ingestion: Contact a poison control center immediately for instructions. Give water to rinse out mouth. Never give liquids to a person with reduced awareness or becoming unconscious. If vomiting occurs, keep head lower than hips to prevent aspiration. If not breathing, give artificial respiration by qualified personnel. Seek immediate medical attention. Most Important Symptoms/Effects, Acute and Delayed: Acid burns to skin, eyes, and lungs. Indication of any immediate medical attention and special treatment needed, if necessary: If any of the above symptoms are present, seek immediate medical attention.

5. FIRE FIGHTING MEASURES

Fire and Explosion Hazards: Negligible fire hazard. See Section 9, “Physical and Chemical Properties” for flammability properties. Extinguishing Media: Suitable: Use extinguishing media appropriate to the surrounding fire. Unsuitable: None listed. Specific Hazards Arising from the Chemical: Thermal decomposition will form oxides of nitrogen. Special Protective Equipment and Precautions for Fire-Fighters: Avoid inhalation of material or combustion byproducts. Wear full protective clothing and NIOSH approved self-contained breathing apparatus (SCBA).

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NFPA Ratings (0 = Minimal; 1 = Slight; 2 = Moderate; 3 = Serious; 4 = Severe) Health = 3 Fire = 0 Reactivity = 0

6. ACCIDENTAL RELEASE MEASURES

Personal Precautions, Protective Equipment and Emergency Procedures: Immediately contact emergency personnel. Keep unnecessary personnel away. Use suitable protective equipment; see Section 8, “Exposure Controls and Personal Protection”. Methods and Materials for Containment and Clean up: Do not touch spilled material. Notify safety personnel of spills. Absorb with sand or other non-combustible material. Collect spilled material in appropriate container for disposal. Isolate hazard area and deny entry.

7. HANDLING AND STORAGE

Safe Handling Precautions: See Section 8, “Exposure Controls and Personal Protection”. Handle glass ampoules with care. Storage: Store and handling in accordance with all current regulations and standards. Keep separated from incompatible substances (acids, combustible materials, halo carbons, amines, bases, oxidizing materials, metals, halogens, metal salts, metal oxides, reducing agents, peroxides, metal carbide, cyanides).

8. EXPOSURE CONTROLS AND PERSONAL PROTECTION

Exposure Limits: Component: Nitric Acid NIOSH (REL): 5 mg/m3 (2 ppm) TWA 10 mg/m3 (4 ppm) STEL 65 mg/m3 (25 ppm) IDLH ACGIH (TLV): 5 mg/m3 (2 ppm) TWA 10 mg/m3 (4 ppm) STEL OSHA (PEL): 5 mg/m3 (2 ppm) TWA Component: Praseodymium Nitrate No occupational limits established. Engineering Controls: Provide local exhaust or process enclosure ventilation system. Ensure compliance with applicable exposure limits. Personal Protection: In accordance with OSHA 29 CFR 1910.132, subpart I, wear appropriate Personal Protective Equipment (PPE) to minimize exposure to this material. Respiratory Protection: If workplace conditions warrant a respirator, a respiratory protection program that meets OSHA 29CFR 1910.134 must be followed. Refer to NIOSH 42 CFR 84 for applicable certified respirators. Eye/Face Protection: Wear splash resistant safety goggles with a face shield. An eye wash station should be readily available near areas of use. Skin and Body Protection: Personal protective equipment for the body should be selected based on the task being performed and the risks involved and should be approved by a specialist before handling this product. Chemical- resistant gloves should be worn at all times when handling chemicals.

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9. PHYSICAL AND CHEMICAL PROPERTIES

Descriptive Properties: Appearance (physical state, color, etc.): colorless to yellow liquid Molecular Formula: not available Molar Mass (g/mol): not available Odor: irritating odor Odor threshold: not available pH: acidic Evaporation rate: not available Melting point/freezing point (ºC): not available Sublimation Point (ºC) not applicable Decompostion (ºC) not applicable Relative Density as specific gravity (water = 1): not available Vapor Pressure (mmHg): not available Vapor Density (air = 1): not available Viscosity (cP): not available Solubility(ies): miscible with water and ether Partition coefficient (n-octanol/water): not available Particle Size not applicable Thermal Stability Properties: Autoignition Temperature (ºC): not applicable Thermal Decomposition (ºC): not applicable Initial boiling point and boiling range (ºC): not available Explosive Limits, LEL (Volume %): not applicable Explosive Limits, UEL (Volume %): not applicable Flash Point (ºC): not applicable Flammability (solid, gas): not applicable

10. STABILITY AND REACTIVITY

Reactivity: Stable at normal temperatures and pressure. Stability: X Stable Unstable Possible Hazardous Reactions: None listed. Conditions to Avoid: Contact with combustible or incompatible materials. Incompatible Materials: Acids, combustible materials, halo carbons, amines, bases, oxidizing materials, metals, halogens, metal salts, metal oxides, reducing agents, peroxides, metal carbide, cyanides. Fire/Explosion Information: See Section 5, “Fire Fighting Measures”. Hazardous Decomposition: Thermal decomposition will produce oxides of nitrogen and praseodymium. Hazardous Polymerization: Will Occur X Will Not Occur

11. TOXICOLOGICAL INFORMATION

Route of Exposure: X Inhalation X Skin X Ingestion Symptoms Related to the Physical, Chemical and Toxicological Characteristics: Burning pain and severe skin corrosion, and eye damage.

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Potential Health Effects (Acute, Chronic and Delayed): Inhalation: Inhalation of nitric acid can damage the mucous membranes and upper respiratory tract. Short term exposure may cause irritation and inflammation of the upper respiratory tract, coughing, choking, sore throat, shortness of breath, headache, dizziness, and nausea. Long term exposure to acid fumes may cause damage to teeth, bronchial irritation, chronic cough, bronchial pneumonia, and gastrointestinal disturbances. Inhalation of praseodymium salts may cause irritation of the upper respiratory tract. No data listed for chronic exposure to praseodymium salts. Skin Contact: Nitric acid can cause severe skin burns. Severity of the damage depends on the concentration and duration of exposure. Effects of acid burns may be delayed. Praseodymium nitrate unlikely to have an effect on intact skin. Praseodymium nitrate may cause severe damage to abraded skin. Eye Contact: Nitric acid can cause severe eye irritation, corneal burns, permanent eye damage, or blindness. Severity of the damage depends on the concentration and duration of exposure. Praseodymium nitrate acute and chronic exposure may cause irritation and conjunctivitis. Ingestion: If ingested, nitric acid can cause severe burns and damage to the gastrointestinal tract. Praseodymium nitrate may cause a delay in blood clotting. Chronic ingestion of nitrates may cause anemia, nephritis and possibly methemoglobinemia. Numerical Measures of Toxicity: Acute Toxicity: Not classified. Nitric acid, Rat, Inhalation LC50: 130 mg/m3 (4 h) Praseodymium nitrate, Rat, Oral LD50: 1859 mg/kg Skin Corrosion/Irritation: This SRM contains >1 % of nitric acid and it is classified as Category 1B. Serious Eye damage/ Eye irritation: This SRM contains >1 % nitric acid and it is classified as Category 1. Respiratory Sensitization: No data available. Skin Sensitization: No data available. Germ Cell Mutagenicity: No data available. Carcinogenicity: Not classified. Listed as a Carcinogen/Potential Carcinogen Yes X No Nitric acid and praseodymium nitrate are not listed by NTP, IARC or OSHA as a carcinogen. Reproductive Toxicity: Not classified. Nitric acid, Rat, Oral TDLo: 21 150 mg/kg (pregnant 1-21 days) Nitric acid, Rat, Oral TDLo: 2345 mg/kg (pregnant 18 days) Praseodymium nitrate: No data available. Specific Target Organ Toxicity, Single Exposure: Not classified. Specific Target Organ Toxicity, Repeated Exposure: Not classified. Aspiration Hazard: No data available.

12. ECOLOGICAL INFORMATION

Ecotoxicity Data: Component: Nitric Acid Mosquitofish (Gambusia affinis), LC50: 72 mg/L (96 h) Component: Praseodymium nitrate No data listed. Persistence and Degradability: No data available. Bioaccumulative Potential: No data available. Mobility in Soil: No data available. Other Adverse effects: No data available.

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13. DISPOSAL CONSIDERATIONS

Waste Disposal: Dispose of waste in accordance with all applicable federal, state, and local regulations. Nitric acid subject to disposal regulations: U.S. EPA 40 CFR 262, Hazardous Waste Numbers: D001.

14. TRANSPORTATION INFORMATION

U.S. DOT and IATA: UN1760, Corrosive liquid, n.o.s. (contains nitric acid), Hazard Class 8, Packing Group II.

15. REGULATORY INFORMATION

U.S. Regulations: CERCLA Sections 102a/103 (40 CFR 302.4): Nitric Acid, 1000 lbs; 454 kg RQ. Praseodymium nitrate not regulated. SARA Title III Section 302 (40 CFR 355.30): Nitric acid, 1000 lbs TPQ. Praseodymium nitrate not regulated. SARA Title III Section 304 (40 CFR 355.40): Nitric acid, 1000 lbs EPCRA RQ. Praseodymium nitrate not regulated. SARA Title III Section 313 (40 CFR 372.65): Nitric Acid: 1 % de minimis concentration. Praseodymium nitrate not regulated. OSHA Process Safety (29 CFR 1910.119): Regulated for nitric acid at higher concentrations 500 lb TQ (≥94.5 % by weight). Praseodymium nitrate not regulated. SARA Title III Sections 311/312 Hazardous Categories (40 CFR 370.21): ACUTE HEALTH: Yes. CHRONIC HEALTH: No. FIRE: No. REACTIVE: No. PRESSURE: No. State Regulations: California Proposition 65: Not listed. U.S. TSCA Inventory: Nitric acid and praseodymium nitrate are listed. TSCA 12(b), Export Notification: Not listed. Canadian Regulations: WHMIS Information: Not provided for this material.

16. OTHER INFORMATION

Issue Date: 07 January 2020 Sources: ChemAdvisor, Inc., MSDS Nitric Acid, 09 December 2015. ChemAdvisor, Inc., MSDS Praseodymium Nitrate, 13 March 2013. CDC; NIOSH; NIOSH Pocket Guide to Chemical Hazards; Department of Health and Human Services (DHHS), Centers for Disease Control and Prevention (CDC), National Institute for Safety and Health; Nitric Acid, 18 November 2010; available at https://www.cdc.gov/niosh/npg/npgd0447.html (accessed Jan 2020).

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Key of Acronyms: ACGIH American Conference of Governmental Industrial NRC Nuclear Regulatory Commission Hygienists ALI Annual Limit on Intake NTP National Toxicology Program CAS Chemical Abstracts Service OSHA Occupational Safety and Health Administration CERCLA Comprehensive Environmental Response, PEL Permissible Exposure Limit Compensation, and Liability Act CFR Code of Federal Regulations RCRA Resource Conservation and Recovery Act DOT Department of Transportation REL Recommended Exposure Limit EC50 Effective Concentration, 50 % RM Reference Material EINECS European Inventory of Existing Commercial RQ Reportable Quantity Chemical Substances EPCRA Emergency Planning and Community Right-to-Know RTECS Registry of Toxic Effects of Chemical Substances Act IARC International Agency for Research on Cancer SARA Superfund Amendments and Reauthorization Act IATA International Air Transport Association SCBA Self-Contained Breathing Apparatus IDLH Immediately Dangerous to Life and Health SRM Standard Reference Material LC50 Lethal Concentration, 50 % STEL Short Term Exposure Limit LD50 Lethal Dose, 50 % TLV Threshold Limit Value LEL Lower Explosive Limit TPQ Threshold Planning Quantity MSDS Material Safety Data Sheet TSCA Toxic Substances Control Act NFPA National Fire Protection Association TWA Time Weighted Average NIOSH National Institute for Occupational Safety and Health UEL Upper Explosive Limit NIST National Institute of Standards and Technology WHMIS Workplace Hazardous Materials Information System n.o.s. Not Otherwise Specified

Disclaimer: Physical and chemical data contained in this SDS are provided only for use in assessing the hazardous nature of the material. The SDS was prepared carefully, using current references; however, NIST does not certify the data in the SDS. The certified values for this material are given in the NIST Certificate of Analysis. Users of this SRM should ensure that the SDS in their possession is current. This can be accomplished by contacting the SRM Program: telephone (301) 975-2200; fax (301) 948-3730; e-mail srmmsds@nist.gov; or via the Internet at https://www.nist.gov/srm.

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