SAFETY DATA SHEET

1   PRODUCT AND SUPPLIER IDENTIFICATION

Product Name:   Cesium Hydroxide

Formula:             CsOH

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

2   HAZARDS IDENTIFICATION

GHS Classification (29 CFR 1910.1200): Acute toxicity - oral, category 4, Skin corrosion/irritation, category 1B, Eye damage/irritation, category 1.

GHS Label Elements:

Signal Word: Danger

Hazard Statements: H302 Harmful if swallowed, H314 Causes severe skin burns and eye damage, H318 Causes serious eye damage.

Precautionary Statements: P260 Do not breath dust or vapors, P264 Wash skin thoroughly after handling, P270 Do not eat, drink or smoke when using this product, 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): Take off immediately all contaminated clothing. Rinse skin with water/shower, P304+P340 IF INHALED: Remove victim 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, P405 Store locked up, P501 Dispose of contents/container in accordance with local, state or federal regulations.

3   COMPOSITION/INFORMATION ON INGREDIENTS

Ingredient:    Cesium Hydroxide

CAS#:             21351-79-1

%:                  ≥99

EC#:               244-344-1

Common Names and Synonyms: Caesium hydroxide.

4   FIRST AID MEASURES

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 if necessary. Immediately wash the affected area with soap and water. Seek immediate medical attention.

EYES: Immediately flush eyes with copious amounts of water, including under eyelids. Seek immediate medical attention.

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.

5   FIREFIGHTING MEASURES

Extinguishing Media: Use suitable extinguishing agent for surrounding materials and type of fire.

Unsuitable Extinguishing Media: No information available.

Specific Hazards Arising from the Material: May release toxic fumes if involved in a fire.

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

6   ACCIDENTAL RELEASE MEASURES

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 raising dust. Cleanup spills with a vacuum system utilizing a high efficiency particulate air (HEPA) filtration system and place in a properly labeled closed container for further handling and disposal.

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

7   HANDLING AND STORAGE

Precautions for Safe Handling: Handle in an enclosed, controlled process. Avoid creating dust. Avoid breathing dust or fumes. Provide adequate ventilation if dusts are created. Avoid exposure to high temperature. 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. Protect from moisture. See section 10 for more information on incompatible materials.

8   EXPOSURE CONTROLS AND PERSONAL PROTECTION

Exposure Limits:    OSHA/PEL:                              ACGIH/TLV:

Cesium Hydroxide     No exposure limit established     No exposure limit established

Engineering Controls: 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 suitable respirator when high concentrations are present.

   Eye Protection: Safety glasses

   Skin Protection: Impermeable gloves, protective work clothing as necessary.

9   PHYSICAL AND CHEMICAL PROPERTIES

Appearance:

Form:                 Powder

Color:                 White to pale yellow

Odor:                  No data

Odor Threshold: Not determined

pH:                                              N/A

Melting Point:                             272.3 ^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):     3.675 g/cc

Solubility in H₂O:                         395.5 g/100 ml @ 15 ^oC

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

Autoignition Temperature:         No data

Decomposition Temperature:     No data

Viscosity:                                     N/A

10   STABILITY AND REACTIVITY

Reactivity: No specific test data available

Chemical Stability: Stable under recommended storage conditions.

Possibility of Hazardous Reactions: No data.

Conditions to Avoid: Hygroscopic. Protect from moisture.

Incompatible Materials: Strong oxidizing agents, acids, water/moisture. Corrosive to glass.

Hazardous Decomposition Products: Cesium oxides.

11   TOXICOLOGICAL INFORMATION

Likely Routes of Exposure: Inhalation, skin and eyes.

Symptoms of Exposure: May be irritating to skin, eyes and lungs.

Acute and Chronic Effects:

Cesium Compounds: Cesium hydroxide is extremely irritating to eyes and skin. It is likely that this effect is the result of the caustic nature of the hydroxide rather than an effect due to cesium per se. Cesium ions block potassium channels in biological membranes in a voltage dependent manner. It has been found that replacing the potassium in the diet of rats with cesium caused death after 10-17 days.

Acute Toxicity: LD50 oral - rat - 570 mg/kg

Carcinogenicity: NTP: Not identified as carcinogenic   IARC: Not identified as carcinogenic

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

12   ECOLOGICAL INFORMATION

Ecotoxicity: No data

Persistence and Degradability: No data

Bioaccumulative Potential: No data

Mobility in Soil: No data

Other Adverse Effects: Do not allow material to be released to the environment. No further relevant information available.

13   DISPOSAL CONSIDERATIONS

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.

14   TRANSPORT INFORMATION

UN Number:                           UN2682

UN Proper Shipping Name:   Caesium Hydroxide

Transport Hazard Class:       8

Packing Group:                      II

Marine Pollutant:                   No

15   REGULATORY INFORMATION

TSCA Listed: Yes

DSL Listed: No

Regulation (EC) No 1272/2008 (CLP): Acute toxicity - oral, category 4, Acute toxicity - inhalation, category 1, Skin corrosion/irritation, category 1B, Eye damage/irritation, category 1, Specific target organ toxicity - single exposure, category 3.

WHMIS 2015 Classification: Acute toxicity, Skin corrosion/irritation, Serious eye damage/eye irritation.

HMIS Ratings: Health: 2     Flammability: 0     Physical: 0

NFPA Ratings: Health: 2     Flammability: 0     Instability: 0

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

16   OTHER INFORMATION

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 2016