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Product Name: Cesium Dichromate
Chemical Formula: Cs2Cr2O7
CAS Number: 13454-78-7
Synonyms: Cesium bichromate
Intended Use: Laboratory chemical, analytical reagent
Supplier: Information depends on the distributor and sourcing region
Emergency Contact: Refer to local official guidelines and emergency numbers
Classification: Oxidizing solid, acute toxicity (oral and inhalation), carcinogenic substance, environmental hazard (chronic aquatic toxicity)
Signal Word: Danger
Hazard Statements: Causes severe skin burns and eye damage, may cause genetic defects, may cause cancer, very toxic to aquatic life with long-lasting effects, may cause allergic skin reaction, toxic if swallowed or inhaled, oxidizer (may intensify fire)
Pictograms: Skull and crossbones, corrosive, environment, health hazard, flame over circle
Precautionary Statements: Avoid contact with skin and eyes, do not breathe dust, wear gloves and goggles, wash hands thoroughly after use, use only outdoors or in a well-ventilated area, keep away from heat and flammable materials, avoid release to the environment
Chemical Name: Cesium Dichromate
CAS Number: 13454-78-7
Weight Percent: 100%
Impurities: Negligible in analytical grade material, but trace alkali or transition metal contamination possible depending on source
Hazardous Components: Hexavalent chromium compounds
Inhalation: Remove individual to fresh air immediately, provide oxygen or artificial respiration if breathing stops, seek medical attention
Skin Contact: Flush skin with plenty of running water for at least 15 minutes, remove contaminated clothing, contact physician
Eye Contact: Rinse eyes with water for at least 15 minutes, keep eyelids open during rinsing, seek immediate medical help
Ingestion: Do not induce vomiting, rinse mouth, give water if person is conscious, never give fluids to unconscious person, immediate medical care essential
Most Important Symptoms: Severe irritation, burns, risk of chronic toxicity with repeated exposure, risk of kidney and liver damage, carcinogenic potential
Notes for Physicians: Supportive care, treat symptomatically, monitor for delayed effects from chromium exposure, consider chelation therapy
Suitable Extinguishing Media: Dry sand, chemical foam, carbon dioxide, do not use water jets directly
Unsuitable Media: Water and standard chemical extinguishers may react violently due to oxidizing nature
Hazardous Combustion Products: Toxic fumes of chromium oxides, cesium compounds, possibly corrosive gases
Firefighting Procedures: Full protective gear with self-contained breathing apparatus required, keep run-off from entering drains or water bodies, evacuate area if large volumes involved
Special Risks: Strong oxidizer, contact with flammable or combustible materials may cause fire, decomposes when heated producing corrosive and toxic gases
Personal Precautions: Evacuate unnecessary personnel, ventilate area, avoid dust formation, do not breathe dust, put on appropriate personal protection (respirator, gloves, goggles, protective clothing)
Environmental Precautions: Prevent entry into water systems, drains, soil, notify authorities if large releases occur
Methods for Containment: Avoid spreading dust using wet methods where safe, cover powder with damp inert absorbent material
Clean-up Methods: Collect residue in closed containers for hazardous waste disposal, thoroughly ventilate and wipe area, avoid generating airborne dust, label and manage contaminated materials as hazardous waste
Decontamination: Clean tools and equipment with water and detergent, dispose rinse water as hazardous waste
Handling: Use in chemical fume hood or well-ventilated area, avoid direct contact with skin and eyes, avoid inhaling dust, do not eat, drink, or smoke in working area, always use personal protective equipment, avoid accidental mixing with flammable materials, acids, and reducing agents
Storage Conditions: Store in tightly sealed containers in a cool, dry, well-ventilated location, store away from combustibles and incompatible materials (acids, organic substances), protect from moisture and heat, lock up chemicals in secure location
Special Considerations: Keep stored container clearly labeled, check regularly for leaks or damage, secondary containment recommended, keep away from direct sunlight and sources of ignition
Occupational Exposure Limits: OSHA PEL: 0.005 mg/m3 (Cr(VI)), NIOSH REL: 0.001 mg/m3 (as Cr(VI)), ACGIH TLV: 0.05 mg/m3 (as Cr(VI))
Engineering Controls: Use local exhaust ventilation, safety showers, eyewash stations, work inside fume hoods
Personal Protection: NIOSH-approved respirators for chromium(VI) compounds, chemical-resistant gloves (nitrile, neoprene), safety goggles or face shield, full-length chemical-resistant lab gown or coveralls
Hygiene Measures: Wash hands and face thoroughly before breaks and after work, do not bring contaminated clothing home for laundering, keep contaminated clothing isolated and launder professionally
Appearance: Orange to red crystalline solid
Odor: Odorless
pH (1% Solution): Acidic
Melting Point: Decomposes above 400 °C
Boiling Point: Not applicable (decomposes)
Solubility: Highly soluble in water, insoluble in most organic solvents
Vapor Pressure: Not applicable
Density: Approx. 4.2 g/cm3
Flash Point: Not flammable by itself
Oxidizing Properties: Strong oxidizer, reacts with organics and reducing agents
Other Properties: May emit toxic fumes when heated, hygroscopic to some extent
Chemical Stability: Stable under recommended storage conditions, decomposes on heating
Conditions to Avoid: Exposure to moisture, heat, sources of ignition, direct sunlight
Incompatible Materials: Reducing agents (such as sulfides, hydrides, organic matter), combustibles, acids, metals
Hazardous Decomposition: Chromium trioxide fumes, cesium oxide, other toxic and corrosive gases
Polymerization: Does not polymerize
Routes of Exposure: Inhalation, ingestion, eye/skin contact
Acute Toxicity: Toxic by all routes, LD50 (oral, rat) from similar hexavalent chrome salts estimated to be < 50 mg/kg
Chronic Toxicity: Known carcinogen (chromium VI), risk of allergic reactions, dermatitis, kidney and liver damage on repeated exposure
Symptoms: Severe irritation to eyes, skin, respiratory tract, risk of ulceration, burns, asthma-like symptoms
Carcinogenicity: Listed as a human carcinogen by IARC, NTP, OSHA
Mutagenicity: Possible genetic effects, evidence from in vitro and animal studies
Other Effects: Sensitization, reproductive toxicity in animal studies, risk of heavy metal poisoning
Ecotoxicity: Extremely toxic to aquatic life, causes long-term damage to aquatic environments, chromium(VI) is especially harmful
Persistence and Degradability: Chromium(VI) persists in water and soils unless reduced to less toxic forms by environmental processes
Bioaccumulation: Potential for bioaccumulation in food chains, especially in aquatic systems
Mobility: Soluble in water, mobile in soils and can contaminate groundwater
Other Information: Avoid any release into the environment, regulatory authorities should be contacted after accidental discharges, waste water should be pretreated to reduce chromium(VI) to the trivalent state before disposal
Waste Treatment Methods: Collect waste in clearly labeled hazardous waste containers, consult local and national hazardous waste regulations
Recommended Disposal: Detoxify by reducing chromium(VI) to chromium(III) using sulfite or ferrous salts under controlled and permitted laboratory conditions
Do Not Dispose: Down drains or into surface water systems
Contaminated Packaging: Dispose of as hazardous waste according to official instructions, never reuse for food or household purposes
Legal Requirements: Disposal must follow specific regional, national, and international chemical waste legislation
UN Number: 3288
UN Proper Shipping Name: Toxic Solid, Inorganic, N.O.S. (contains Hexavalent Chromium)
Transport Hazard Classes: 6.1 (Toxic substances), 5.1 (Oxidizer)
Packing Group: II
Environmental Hazards: Marine pollutant for transport, requires special markings
Special Precautions for Transport: Carefully secure packages upright, avoid rough handling, keep away from incompatible materials, ensure clear hazard labeling, emergency procedures in place
US OSHA: Classified as a hazardous material under 29 CFR 1910.1200
TSCA: Listed in the US Toxic Substances Control Act inventory
SARA Title III: Subject to reporting under Sections 302/313 for chromium(VI) compounds, subject to emergency planning
RCRA Status: Waste containing this compound is a hazardous waste under US regulations
EU CLP: Labeled as oxidizing, carcinogenic, and environmentally hazardous as per Regulation EC No 1272/2008
Other International Regulations: Included in inventories and hazard lists by Canada DSL/NDSL, Australia AICS, Japan ENCS, and more
Workplace Regulations: Strict exposure controls required, carcinogen handling protocols mandated
Additional Restrictions: Use and disposal regulated by national and regional authorities, requires strict record-keeping, notification of authorities for large quantities
