SECTION 1. IDENTIFICATION
Product Name: Bis(cyclopentadienyl)hafnium(IV) Dichloride
Product Number: All applicable American Elements product codes, e.g. BC5DE-HF-02-00
, BC5DE-HF-03-00
, BC5DE-HF-04-00
, BC5DE-HF-05-00
CAS #: 12116-66-4
Relevant identified uses of the substance: Scientific research and development
Supplier details:
American Elements
10884 Weyburn Ave.
Los Angeles, CA 90024
Tel: +1 310-208-0551
Fax: +1 310-208-0351
Emergency telephone number:
Domestic, North America: +1 800-424-9300
International: +1 703-527-3887
SECTION 2. HAZARDS IDENTIFICATION
OSHA Haz Com: CFR 1910.1200: Skin Corrosion/Irritation [Category 2]
Eye Damage/Irritation [Category 2A]
Specific Target Organ Toxicity (Single Exposure) [Category 2]
Signal word: Warning!
Hazard Statement(s): Causes serious eye irritation
Causes skin irritation
May cause damage to organs: Liver
Pictogram(s) or Symbol(s):
Precautionary Statement(s):
[Prevention] Wash hands and face thoroughly after handling. Wear protective gloves. Wear eye and face protection. Do
not breathe dusts or mists. Wash all exposed skin thoroughly after handling. Do not eat, drink or smoke
when using this product.
[Response] If on skin: Wash with plenty of water. If skin irritation or rash occurs: Get medical advice/attention. Take off
contaminated clothing and wash it before reuse. 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 or attention. If exposed or concerned: Call a poison center or doctor.
[Storage] Store locked up.
[Disposal] Dispose of contents and container in accordance with US EPA guidelines for the classification and
determination of hazardous waste listed in 40 CFR 261.3. (See Section 13)
SECTION 3. COMPOSITION/INFORMATION ON INGREDIENTS
Substance/Mixture: Substance
Components: Hafnocene Dichloride
Percent: >98.0%(T)
CAS Number: 12116-66-4
Molecular Weight: 379.58
Chemical Formula: C10H10Cl2Hf
Synonyms: Bis(cyclopentadienyl)hafnium Dichloride
SECTION 4. FIRST AID MEASURES
Inhalation: Call a poison center or doctor if you feel unwell. Effects of exposure (inhalation) to substance may be
delayed. Inhalation of vapors or contact with substance will result in contamination and potential harmful
effects. Move victim to fresh air. Give artificial respiration if victim is not breathing. Administer oxygen if
breathing is difficult. Keep victim warm and quiet. Treat symptomatically and supportively. Ensure that
medical personnel are aware of the material(s) involved and take precautions to protect themselves.
Skin contact: Call a poison center or doctor if you feel unwell. Effects of exposure (skin contact) to substance may be
delayed. Remove and wash contaminated clothing before re-use. In case of contact with substance,
immediately flush skin with running water for at least 20 minutes. Treat symptomatically and supportively.
Ensure that medical personnel are aware of the material(s) involved and take precautions to protect
themselves.
Eye contact: IMMEDIATELY flush eyes with running water for at least 15 minutes, keeping eyelids open. Contact with
material may irritate or burn eyes. Call emergency medical service. Move victim to fresh air. Check for and
remove any contact lenses. Keep victim warm and quiet. Treat symptomatically and supportively. Effects of
exposure to substance may be delayed. Ensure that medical personnel are aware of the material(s)
involved and take precautions to protect themselves.
Ingestion: Do not induce vomiting with out medical advice. Effects of exposure (ingestion) to substance may be
delayed. If swallowed, seek medical advice immediately and show the container or label. Do not use
mouth-to-mouth method if victim ingested the substance; give artificial respiration with the aid of a pocket
mask equipped with a one-way valve or other proper respiratory medical device. Loosen tight clothing such
as a collar, tie, belt or waistband. If a person vomits place them in the recovery position so that vomit will
not reenter the mouth and throat. Rinse mouth. Keep victim warm and quiet. Treat symptomatically and
supportively. Ensure that medical personnel are aware of the material(s) involved and take precautions to
protect themselves.
Symptoms/effects:
Acute: Redness.
Delayed: No data available
Immediate medical attention: If breathing has stopped, perform artificial respiration. Use first aid treatment according to the nature of the
injury. Ensure that medical personnel are aware of the material(s) involved and take precautions to protect
themselves.
SECTION 5. FIREFIGHTING MEASURES
Suitable extinguishing media: Dry chemical, CO2 , water spray, or alcohol-resistant foam. Consult with local fire authorities before
attempting large scale fire fighting operations.
Specific hazards arising from the chemical
Hazardous combustion products: These products include: Carbon oxides Halogenated compounds
Other specific hazards: WARNING: Highly toxic HCl gas is produced during combustion.
WARNING: Highly toxic HF gas is produced during combustion.
Special precautions for fire-fighters:
Use water spray or fog; do not use straight streams. Dike fire-control water for later disposal; do not scatter the material. Containers may explode when
heated. Move containers from fire area if you can do it without risk.
Special protective equipment for fire-fighters:
Wear positive pressure self-contained breathing apparatus (SCBA). Structural fire fighters' protective clothing provides limited protection in fire situations
ONLY; it may not be effective in spill situations. Wear chemical protective clothing which is specifically recommended by the manufacturer. It may
provide little or no thermal protection.
SECTION 6. ACCIDENTAL RELEASE MEASURES
Personal precautions: Avoid contact with skin, eyes, and clothing. Keep people away from and upwind of spill/leak. Do not touch
damaged containers or spilled material unless wearing appropriate protective clothing (Section 8). Warn
unnecessary personnel to move away. Stop leak if you can do it without risk. Ensure adequate ventilation.
Isolate the hazard area and deny entry to unnecessary and unprotected personnel.
Personal protective equipment: Wear eye protection (splash goggles) and face protection (full length face shield). Lab coat. Dust
respirator. Be sure to use a MSHA/NIOSH approved respirator or equivalent. Wear protective gloves
(nitrile).
Emergency procedures: Prevent dust cloud. Do not clean-up or dispose except under supervision of a specialist. In case of a spill
and/or a leak, always shut off any sources of ignition, ventilate the area, and excercise caution. Do not
touch damaged containers or spilled material unless wearing appropriate protective clothing. Warn
personnel to move away. Prevent entry into sewers, basements or confined areas; dike if needed.
Methods and materials for containment and cleaning up:
ELIMINATE all ignition sources (no smoking, flares, sparks, or flames in immediate area). Stop leak if without risk. Ventilate the area. Absorb with an
inert material and put the spilled material in an appropriate waste disposal container. Use clean non-sparking tools to collect absorbed material.
Environmental precautions:
Keep away from living quarters. Prevent further leakage or spillage if safe to do so. Water runoff can cause environmental damage. Prevent entry into
sewers, basements or confined areas; dike if needed.
SECTION 7. HANDLING AND STORAGE
Precautions for safe handling: Avoid inhalation of vapor or mist. Avoid contact with skin and eyes. Good general ventilation should be
sufficient to control airborne levels. Keep container dry. Handle and open container with care. Wear
suitable protective clothing, gloves and eye/face protection. When using do not eat, drink, or smoke. Keep
away from sources of ignition.
Conditions for safe storage: Store locked up. Keep containers tightly closed in a cool, well-ventilated place. Keep away from
incompatibles. Containers which are opened must be carefully resealed and kept upright to prevent
leakage. Avoid prolonged storage periods. Store under inert gas (e.g. Argon). Moisture sensitive.
Storage incompatibilities: Store away from oxidizing agents
SECTION 8. EXPOSURE CONTROLS/PERSONAL PROTECTION
Exposure limits: No data available
Appropriate engineering controls:
Good general ventilation should be sufficient to control airborne levels. Ventilation is normally required when handling or using this product. Eyewash
fountains should be provided in areas where there is any possibility that workers could be exposed to the substance. Follow safe industrial
engineering/laboratory practices when handling any chemical.
Personal protective equipment
Respiratory protection: Dust respirator. Be sure to use a MSHA/NIOSH approved respirator or equivalent.
Hand protection: Wear protective gloves.
Eye protection: Safety glasses.
Skin and body protection: Lab coat.
SECTION 9. PHYSICAL AND CHEMICAL PROPERTIES
Physical state (20°C): Solid
Form: Crystal - Powder
Color: White - Slightly pale reddish yellow
Odor: No data available
Odor threshold: No data available
Melting point/freezing point: 233°C (451°F)
Boiling point/range: No data available
Decomposition temperature: No data available
Relative density: No data available
Kinematic Viscosity: No data available
Partition coefficient: No data available
n-octanol/water (log Pow)
Flash point: No data available
Flammability (solid, gas): No data available
pH: No data available
Vapor pressure: No data available
Vapor density: No data available
Dynamic Viscosity: No data available
Evaporation rate: No data available
(Butyl Acetate = 1)
Autoignition temperature: No data available
Flammability or explosive limits: No data available
Lower: No data available
Upper: No data available
Solubility(ies):
Water: Insoluble
Soluble: Hot toluene
SECTION 10. STABILITY AND REACTIVITY
Reactivity: Not Available
Chemical Stability: Moisture sensitive.
Possibility of Hazardous Reactions: No hazardous reactivity has been reported.
Conditions to avoid: Exposure to moisture. Moisture sensitive.
Incompatible materials: Oxidizing agents
Hazardous Decomposition Products: No data available
SECTION 11. TOXICOLOGICAL INFORMATION
RTECS Number: MG4815000
Acute Toxicity:
ivn-mus LD50:100 mg/kg
Skin corrosion/irritation:
No data available
Serious eye damage/irritation:
No data available
Respiratory or skin sensitization:
No data available
Germ cell mutagenicity:
No data available
Carcinogenicity:
No data available
IARC: No data available NTP: No data available OSHA: No data available
Reproductive toxicity:
No data available
Routes of Exposure: Inhalation, Eye contact, Ingestion, Skin contact.
Symptoms related to exposure:
Skin contact may result in inflammation; characterized by itching, scaling, reddening, or occasionally blistering. Skin contact may result in redness, pain
or dry skin. Eye contact may result in redness or pain.
Potential Health Effects:
Skin and eye contact may result in irritation.
Target organ(s):
May cause damage to organs: Liver
SECTION 12. ECOLOGICAL INFORMATION
Ecotoxicity
Fish: No data available
Crustacea: No data available
Algae: No data available
Persistence and degradability: No data available
Bioaccumulative potential (BCF): No data available
Mobillity in soil: No data available
Partition coefficient:
n-octanol/water (log Pow)
No data available
Soil adsorption (Koc): No data available
Henry's Law:
constant (PaM3/mol)
SECTION 13. DISPOSAL CONSIDERATIONS
Disposal of product: Recycle to process if possible. It is the generator's responsibility to comply with Federal, State and Local
rules and regulations. You may be able to dissolve or mix material with a combustible solvent and burn in a
chemical incinerator equipped with an afterburner and scrubber system. This section is intended to provide
assistance but does not replace these laws, nor does compliance in accordance with this section ensure
regulatory compliance according to the law. US EPA guidelines for Identification and Listing of Hazardous
Waste are listed in 40 CFR Parts 261. The product should not be allowed to enter the environment, drains,
water ways, or the soil.
Disposal of container: Dispose of as unused product. Do not re-use empty containers.
Other considerations: Observe all federal, state and local regulations when disposing of the substance.
SECTION 14. TRANSPORT INFORMATION
DOT (US) Non-hazardous for transportation.
IATA Non-hazardous for transportation.
IMDG Non-hazardous for transportation.
SECTION 15. REGULATORY INFORMATION
Toxic Substance Control Act (TSCA 8b.):
This product is ON the EPA Toxic Substances Control Act (TSCA) inventory.
US Federal Regulations
CERCLA Hazardous substance and Reportable Quantity:
SARA 313: Not Listed
SARA 302: Not Listed
State Regulations
State Right-to-Know
Massachusetts Not Listed
New Jersey Not Listed
Pennsylvania Not Listed
California Proposition 65: Not Listed
Other Information
NFPA Rating:
Health: 2
Flammability: 0
Instability: 0
HMIS Classification:
Health: 2
Flammability: 0
Physical: 0
International Inventories
WHMIS hazard class: D2B: Materials causing other toxic effects. (Toxic)
EC-No: 235-177-5
SECTION 16. OTHER INFORMATION
Safety Data Sheet according to Regulation (EC) No. 1907/2006 (REACH). 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. American Elements 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 1997-2022 AMERICAN ELEMENTS. LICENSED GRANTED TO MAKE UNLIMITED PAPER COPIES FOR INTERNAL USE ONLY.
The number of electrons in each of Hafnium's shells is 2, 8, 18, 32, 10, 2 and its electron configuration is [Xe] 4f14 5d2 6s2. The hafnium atom has a radius of 159 pm and a Van der Waals radius of 212 pm. Hafnium was predicted by Dmitri Mendeleev in 1869 but it was not until 1922 that it was first isolated Dirk Coster and George de Hevesy. In its elemental form, hafnium has a lustrous silvery-gray appearance. 
Hafnium does not exist as a free element in nature. It is found in zirconium compounds such as zircon. Hafnium is often a component of superalloys and circuits used in semiconductor device fabrication. Its name is derived from the Latin word Hafnia, meaning Copenhagen, where it was discovered.
In its elemental form, chlorine is a yellow-green gas. Chlorine is the second lightest halogen after fluorine. It has the third highest electronegativity and the highest electron affinity of all elements, making it a strong oxidizing agent. It is rarely found by itself in nature. Chlorine was discovered and first isolated by Carl Wilhelm Scheele in 1774. It was first recognized as an element by Humphry Davy in 1808.
