# HIMO\-1 High Purity Molybdenum Certified Reference Material – Safety Data Sheet Text extracted from the original PDF. Tables, images, symbols and OCR may differ. Check the original PDF for safety information. - **Document title:** HIMO\-1 High Purity Molybdenum Certified Reference Material – Safety Data Sheet - **Publisher:** National Research Council Canada - **Material:** HIMO\-1 high\-purity molybdenum certified reference material containing certified trace scandium - **CAS number:** 7439\-98\-7 - **Product code / grade:** HIMO\-1; Version 1\.0 - **Document type:** SDS - **Original language:** English - **Region:** Canada - **Revision date:** 31 July 2025 - **Page count:** 7 - **Original filename:** himo1\-en\.pdf - **RESDS page:** https://resds\.com/document/himo\-1\-high\-purity\-molybdenum\-certified\-reference\-material\-en\-64afff4be3 - **Original PDF:** https://resds\.com/pdf/himo\-1\-high\-purity\-molybdenum\-certified\-reference\-material\-en\-64afff4be3\.pdf - **Source URL:** https://nrc\-digital\-repository\.canada\.ca/eng/view/supplement/?id=ccba7490\-cd75\-4851\-973c\-c223096fc190&dsl=en - **Description:** Collected by RESDS\. Original publisher PDF retained\. HIMO\-1 high\-purity molybdenum CRM for elemental\-impurity analysis\. SDS Section 3 identifies molybdenum at 100% \(CAS 7439\-98\-7\); no scandium CAS or concentration is asserted from the SDS\. The official NRC product record certifies scandium at 28 µg/kg with expanded uncertainty 28 µg/kg\. Revision 31 July 2025, version 1\.0\. Source: National Research Council Canada\. Licensed under the Open Government Licence – Canada\. ## Page 1 ```text HIMO Safety Data Sheet According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2024 and the Hazardous Products Regulations (HPR) WHMIS 2022 Issue date : 2025-07-31 Revision date : 2025-07-31 Version : 1,0 SECTION 1: Identification 1.1. Product identifier Product form : Substance Substance name : HIMO CAS-No. : 7439-98-7 Formula : Mo Chemical name : molybdenum 1.2. Other means of identification No additional information available 1.3. Recommended use and restrictions on use Recommended use : For research purpose only 1.4. Supplier National Research Council Canada 1200 Montreal Road Ottawa, K1A 0R6 - Canada T 613-993-2359 1.5. Emergency telephone number Emergency number : CANUTEC 1-613-996-6666 SECTION 2: Hazard(s) identification 2.1. Classification of the substance or mixture GHS classification Not classified. 2.2. GHS Label elements, including precautionary statements GHS labelling No labelling applicable 2.3. Hazards associated with known or reasonably anticipated uses No additional information available 2.4. Other hazards which do not result in classification No additional information available 2.5. Unknown acute toxicity Not applicable SECTION 3: Composition/information on ingredients 3.1. Substances Name : HIMO CAS-No. : 7439-98-7 Name Product identifier % by weight Molybdenum CAS-No.: 7439-98-7 100 3.2. Mixtures Not applicable 07/31/2025 EN (English) 1/7 ``` ## Page 2 ```text HIMO Safety Data Sheet According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2024 and the Hazardous Products Regulations (HPR) WHMIS 2022 SECTION 4: First-aid measures 4.1. Description of first aid measures First-aid measures after inhalation : If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing. Get medical advice/attention if you feel unwell. First-aid measures after skin contact : If skin irritation occurs: Wash skin with plenty of water. Obtain medical attention if irritation persists. First-aid measures after eye contact : 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. First-aid measures after ingestion : Do not induce vomiting without medical advice. Never give anything by mouth to an unconscious person. Get medical advice/attention if you feel unwell. 4.2. Most important symptoms and effects (acute and delayed) Symptoms/effects after inhalation : May cause irritation to the respiratory tract. Symptoms/effects after skin contact : May cause skin irritation. Repeated exposure may cause skin dryness or cracking. Symptoms/effects after eye contact : May cause eye irritation. Symptoms may include discomfort or pain, excess blinking and tear production, with possible redness and swelling. Symptoms/effects after ingestion : May be harmful if swallowed. May cause gastrointestinal irritation, nausea, vomiting and diarrhea. 4.3. Immediate medical attention and special treatment, if necessary Symptoms may be delayed. In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible). SECTION 5: Fire-fighting measures 5.1. Suitable (and unsuitable) extinguishing media Suitable extinguishing media : Use agents for metal fires (such as: MET-L-X, TEC, or G-1 powder). Class D extinguisher. Unsuitable extinguishing media : Do not use water jet. 5.2. Specific hazards arising from the chemical Explosion hazard : Under abnormal conditions, molybdenum powder or dust may present a fire hazard depending upon particle size, dispersion and exposure to an ignition source(s). Mo wrought metals does not readily burn. When Mo is heated in air above 650, MoO3 sublimes. 5.3. Special protective equipment and precautions for fire-fighters Firefighting instructions : Do not enter fire area without proper protective equipment, including respiratory protection. For large fire: Self-contained breathing apparatus. Protection during firefighting : Keep upwind of fire. Wear full fire fighting turn-out gear (full Bunker gear) and respiratory protection (SCBA). SECTION 6: Accidental release measures 6.1. Personal precautions, protective equipment and emergency procedures General measures : Use personal protection recommended in Section 8. Isolate the hazard area and deny entry to unnecessary and unprotected personnel. 6.1.1. For non-emergency personnel No additional information available 2025-07-31 EN (English) 2/7 ``` ## Page 3 ```text HIMO Safety Data Sheet According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2024 and the Hazardous Products Regulations (HPR) WHMIS 2022 6.1.2. For emergency responders No additional information available Environmental precautions : Prevent entry to sewers and public waters. 6.2. Methods and material for containment and cleaning up For containment : Absorb and/or contain spill with inert material (sand, vermiculite or other appropriate material), then place in suitable container. Do not flush into surface water or sewer system. Wear recommended personal protective equipment. Methods for cleaning up : Sweep or shovel spills into appropriate container for disposal. Provide ventilation. For further information refer to section 8: "Exposure controls/personal protection". SECTION 7: Handling and storage 7.1. Precautions for safe handling Precautions for safe handling : Avoid contact with skin and eyes. Avoid breathing dust/fume/gas/mist/vapours/spray. Do not swallow. Handle and open container with care. When using do not eat, drink or smoke. Hygiene measures : Wash contaminated clothing before reuse. Always wash hands after handling the product. 7.2. Conditions for safe storage, including any incompatibilities Storage conditions : Keep out of the reach of children. Keep container tightly closed. Store in a dry, cool and well-ventilated place. SECTION 8: Exposure controls/personal protection 8.1. Control parameters Molybdenum (7439-98-7) ACGIH - TLV® TWA 10 mg/m³ (inhalable particulate matter) 3 mg/m³ (respirable particulate matter) OSHA Not applicable IDLH 5000 mg/m³ NIOSH Not applicable 8.2. Appropriate engineering controls Appropriate engineering controls : Ensure good ventilation of the work station. Environmental exposure controls : Avoid release to the environment. 8.3. Individual protection measures/Personal protective equipment Hand protection: Wear suitable gloves. Consult glove manufacturer's product information on material suitability and material thickness. Eye protection: Safety glasses or goggles are recommended when using product. 2025-07-31 EN (English) 3/7 ``` ## Page 4 ```text HIMO Safety Data Sheet According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2024 and the Hazardous Products Regulations (HPR) WHMIS 2022 Skin and body protection: Wear suitable protective clothing Respiratory protection: In case of insufficient ventilation, wear suitable respiratory equipment. Respirator selection must be based on known or anticipated exposure levels, the hazards of the product and the safe working limits of the selected respirator. SDSs cannot provide detailed and complete respiratory protection guidelines. Selection of respiratory protection must be done by a qualified person who has assessed the work environment. Other information: Handle in accordance with good industrial hygiene and safety procedures. Do not eat, drink or smoke when using this product. SECTION 9: Physical and chemical properties 9.1. Information on basic physical and chemical properties Physical state : Solid (wire) Colour : Grey Odour : No data available Odour threshold : No data available pH : No data available Melting point : 2622 °C / 4751.6 °F Freezing point : No data available Boiling point : 4825 °C / 8717 °F Flash point : No data available Relative evaporation rate (butyl : No data available acetate=1) Flammability : Not Flammable Vapour pressure : 1 mm Hg at 3102 °C / 5615.6 °F Relative vapour density at 20°C / 68 °F : No data available Relative density : No data available Density : 10.2 gm/cc Solubility : Water: Insoluble Partition coefficient n-octanol/water : No data available Auto-ignition temperature : No data available Decomposition temperature : No data available Viscosity, kinematic : No data available Viscosity, dynamic : No data available Explosive limits : No data available Explosive properties : No data available Oxidising properties : No data available 9.2. Other information No additional information available 2025-07-31 EN (English) 4/7 ``` ## Page 5 ```text HIMO Safety Data Sheet According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2024 and the Hazardous Products Regulations (HPR) WHMIS 2022 SECTION 10: Stability and reactivity 10.1. Reactivity No dangerous reactions known under normal conditions of use. 10.2. Chemical stability Stable under normal conditions. 10.3. Possibility of hazardous reactions No dangerous reactions known under normal conditions of use. 10.4. Conditions to avoid Heat. Incompatible materials. 10.5. Incompatible materials Strong oxidizers; BrF3, ClF3, F2, PbO2 10.6. Hazardous decomposition products None SECTION 11: Toxicological information 11.1. Information on toxicological effects Acute toxicity (oral) : Not classified Acute toxicity (dermal) : Not classified Acute toxicity (inhalation) : Not classified Molybdenum (7439-98-7) LD50 dermal rat > 2000 mg/kg bodyweight Animal: rat, Guideline: OECD Guideline 402 (Acute Dermal Toxicity) LC50 inhalation rat > 5.84 mg/L/4h Skin corrosion/irritation : Based on available data, the classification criteria are not met. Serious eye damage/irritation : Based on available data, the classification criteria are not met. Respiratory or skin sensitisation : Based on available data, the classification criteria are not met. Germ cell mutagenicity : Based on available data, the classification criteria are not met. Carcinogenicity : Based on available data, the classification criteria are not met. Reproductive toxicity : Based on available data, the classification criteria are not met. STOT-single exposure : Based on available data, the classification criteria are not met. STOT-repeated exposure : Based on available data, the classification criteria are not met. Aspiration hazard : Based on available data, the classification criteria are not met. Symptoms/effects after inhalation : May cause irritation to the respiratory tract. Symptoms/effects after skin contact : May cause skin irritation. Repeated exposure may cause skin dryness or cracking. Symptoms/effects after eye contact : May cause eye irritation. Symptoms may include discomfort or pain, excess blinking and tear production, with possible redness and swelling. Symptoms/effects after ingestion : May be harmful if swallowed. May cause gastrointestinal irritation, nausea, vomiting and diarrhea. Other information : Likely routes of exposure: ingestion, inhalation, skin and eye. 2025-07-31 EN (English) 5/7 ``` ## Page 6 ```text HIMO Safety Data Sheet According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2024 and the Hazardous Products Regulations (HPR) WHMIS 2022 SECTION 12: Ecological information 12.1. Ecotoxicity Ecology - general : May cause long-term adverse effects in the aquatic environment. 12.2. Persistence and degradability HIMO (7439-98-7) Persistence and degradability Not established 12.3. Bioaccumulative potential HIMO (7439-98-7) Bioaccumulative potential Not established 12.4. Mobility in soil No additional information available 12.5. Other adverse effects No additional information available SECTION 13: Disposal considerations 13.1. Disposal methods Product/Packaging disposal : Dispose of contents/container to hazardous or special waste collection point, recommendations in accordance with local, regional, national and/or international regulation. SECTION 14: Transport information 14.1. UN number Not regulated for transport 14.2. UN proper shipping name Proper Shipping Name (DOT) : Not applicable Proper Shipping Name (TDG) : Not applicable 14.3. Transport hazard class(es) DOT Transport hazard class(es) (DOT) : Not applicable TDG Transport hazard class(es) (TDG) : Not applicable 14.4. Packing group Packing group (DOT) : Not applicable Packing group (TDG) : Not applicable 14.5. Environmental hazards Other information : No supplementary information available. 14.6. Transport in bulk Not applicable 14.7. Special precautions for user Special transport precautions : Do not handle until all safety precautions have been read and understood. 2025-07-31 EN (English) 6/7 ``` ## Page 7 ```text HIMO Safety Data Sheet According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2024 and the Hazardous Products Regulations (HPR) WHMIS 2022 SECTION 15: Regulatory information 15.1 Federal regulations All components of this product are listed, or excluded from listing, on the United States Environmental Protection Agency Toxic Substances Control Act (TSCA) inventory. All components of this product are listed, or excluded from listing, on the Canadian DSL (Domestic Substances List) and NDSL (Non-Domestic Substances List) inventories. 15.2. International regulations No additional information available 15.3. US State regulations No additional information available SECTION 16: Other information According to the Hazard Communication Standard (CFR29 1910.1200) HazCom 2024 and the Hazardous Products Regulations (HPR) WHMIS 2022 Issue date : 2025-07-31 Revision date : 2025-07-31 Other information : None Version # : 1.0 Prepared by : Nexreg Compliance Inc. www.Nexreg.com Disclaimer: The information provided on this Safety Data Sheet is correct to the best of our knowledge, information and belief at the date of its publication. The information given is designed only as a guide for safe handling, use, processing, storage, transportation, disposal and release and is not to be considered as a warranty or quality specification. The information relates only to the specific material designated and may not be valid for such material used in combination with any other material or in any process, unless specified in the text. This material is for research and experimental applications only. It is not intended for food, drug, household, agricultural, or cosmetic use. Its use must be supervised by technically qualified individuals with experience in the handling of potentially hazardous chemicals. Apart from the solvent in this product (if applicable), the hazardous components present in the solution are at such low concentrations that exact determination of degree of hazard is not warranted and would be misleading. We shall not be held liable for any damage resulting from handling or from contact with the above product. 2025-07-31 EN (English) 7/7 ```