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Product Name: Barium Dichromate
Chemical Formula: BaCr2O7
Synonyms: Dichromic acid, barium salt; Barium(VI) dichromate
CAS Number: 13423-00-4
Manufacturer Contact: Emergency phone numbers available from major chemical suppliers, accessible 24/7 for advice on exposures or spills.
Recommended Use: Industrial chemical, laboratory research, pigment manufacturing
Restrictions on Use: Not intended for use in food, drugs, or cosmetics; strictly controlled in public and educational environments, especially for youth or general workplace settings.
Classification: Oxidizing solid, Category 2; Carcinogenicity, Category 1B; Acute toxicity oral, Category 2; Reproductive toxicity, Category 1B; Skin corrosion/irritation, Category 2; Eye damage, Category 1
Signal Word: Danger
Hazard Statements: Fatal if swallowed; Strong oxidizer—raises fire and explosion risk on contact with combustibles; Causes severe skin burns and eye damage; Causes cancer by inhalation and ingestion; May damage fertility or unborn child
Pictograms: Skull and crossbones, Health hazard, Corrosive, Flame over circle
Precautionary Statements: Keep away from heat and flammable materials; Wear protective gloves, clothing, and eye/face protection; Seek urgent medical attention after exposure; Do not eat, drink, or smoke when handling
Substance: Barium Dichromate
Concentration: 99-100%
Chemical Name: Barium Dichromate
CAS Number: 13423-00-4
Impurities: Trace metal oxides may exist, contributing to minor risks, but not expected to influence toxic profile
Inhalation: Move to fresh air quickly; seek immediate medical advice. Support breathing with oxygen if needed.
Skin Contact: Strip contaminated clothes immediately. Wash exposed skin for at least 15 minutes under flowing water. Medical observation needed, due to potential for delayed effects.
Eye Contact: Rinse eyes with large amounts of water for several minutes. Remove contact lenses if possible. Continue irrigation and consult an eye specialist.
Ingestion: Do not induce vomiting. Rinse mouth. Immediate hospital treatment needed for suspected ingestion—risk of organ damage.
Most Important Symptoms: Cough, sore throat, shortness of breath, redness and blistering of skin, severe eye irritation, nausea, vomiting, abdominal pain, risk of long-term organ damage, carcinogenic risks
Medical Advice: Supportive care only. Symptomatic treatment; monitor kidney and liver function. Delayed effects possible, hospitalization recommended after acute exposure.
Suitable Extinguishing Media: Dry chemical, carbon dioxide, large quantities of water spray for cooling (not for direct extinguishing); use agents for fire origin, not for chemical itself
Specific Hazards: Non-combustible, but powerful oxidizer; accelerates burning of other materials; decomposition produces toxic fumes of chromium and barium compounds
Special Protective Equipment: Self-contained breathing apparatus and chemical-resistant clothing; prevent contact with spilled chemical and hazardous fumes
Precautions: Isolate area; keep combustibles and flammable materials away. Fire residues may contaminate water sources, so runoff must be contained. Approach upwind.
Personal Precautions: Evacuate unnecessary personnel; regular cleaning staff must use full protective gear (gloves, goggles, respirator, chemical suit); avoid dust formation.
Environmental Precautions: Prevent chemical from entering drains, watercourses, or soil. Extremely hazardous to aquatic life.
Methods for Cleaning Up: Collect spill carefully using non-sparking tools. Mop up with dampened disposable absorbent material—dispose according to regulations for chromium and barium waste. Ventilate area well.
Handling: Work in properly ventilated areas or fume hoods. Handle with chemical-resistant gloves and goggles. Do not eat, drink, or smoke nearby. Carefully avoid dusting and spills.
Storage: Store in tightly closed containers made of compatible, corrosion-resistant material. Separate from flammables, acids, organic materials, and reducing agents. Keep in a cool, dry place, out of direct sunlight and away from heat.
Incompatible Materials: Reducing agents, strong acids, organic materials, finely divided combustibles (e.g., paper, wood dust)
Occupational Exposure Limits: Barium compounds: OSHA PEL 0.5 mg/m³ (as Ba); Chromium(VI) compounds: OSHA PEL 0.005 mg/m³
Engineering Controls: Local exhaust ventilation and process enclosures.
Personal Protective Equipment: Nitrile or neoprene gloves, full-sleeve lab coat, tightly fitted safety goggles, face shield for splash risk, NIOSH-approved respirator for dust or insufficient ventilation.
Hygiene Measures: Wash hands before breaks and after handling chemical; no food or beverages in work area.
Appearance: Orange to red crystalline powder
Odor: Odorless
pH (aqueous solution): Acidic
Melting Point: Decomposes without melting at high temperature
Boiling Point: Not applicable
Solubility: Slightly soluble in water; more so in acids
Density: Approximately 3.34 g/cm³
Vapor Pressure: Not relevant (non-volatile)
Partition Coefficient (octanol/water): No data available
Evaporation Rate: Not applicable
Chemical Stability: Stable in storage under recommended conditions
Reactivity: Oxidizing nature; reacts with reducing materials, combustibles, acids, and organics
Hazardous Reactions: May liberate oxygen and accelerate fire
Decomposition Products: Toxic chromium(VI) compounds, barium oxide, and particulate matter
Conditions to Avoid: High temperatures, sources of ignition, contamination with incompatible substances
Acute Toxicity: Highly toxic if swallowed, inhaled, or on skin; LD50 (oral, rat): about 20 mg/kg
Chronic Toxicity: Carcinogenic to humans (IARC Group 1 for Cr(VI) compounds); kidney and liver injury risk; adverse effects on reproductive health
Skin/Eye Damage: Severe burns, ulceration, and permanent vision damage possible
Symptoms of Exposure: Gastrointestinal pain, vomiting, diarrhea, headache, confusion, red skin, blisters; long-term exposures linked to cancer, respiratory disease, and dermatitis
Target Organs: Lungs, kidneys, liver, skin, eyes, blood
Aquatic Toxicity: Extremely toxic to aquatic organisms, even in minute concentrations
Persistence/Degradability: Not quickly biodegradable; chromate ions persist for years in soils, water, or sediment
Bioaccumulation Potential: Both chromium and barium bioaccumulate, impacting long-lived species and entering food chains
Mobility in Soil: Chromium(VI) ions are highly mobile and spread through groundwater, leading to contamination far from spill source.
Other Adverse Effects: Bioactivity at trace levels raises risk for reproductive or developmental disruption in wildlife.
Waste Treatment Methods: Disposal as hazardous waste at a licensed facility required by federal EPA and local regulatory authorities.
Contaminated Packaging: Clean or dispose of containers under hazardous waste protocols; do not reuse.
Disposal Prohibitions: Never release into sewers, waterways, or general waste streams; follow university, corporate, or community hazardous waste collection guidelines strictly.
Sustainable Solutions: Chromium and barium can be stabilized, treated to lower toxicity before landfilling; investing in chemical reclamation and neutralization can protect both environment and workers.
UN Number: UN1564
UN Proper Shipping Name: Barium dichromate
Transport Hazard Class: 5.1 (oxidizer)
Packing Group: II
Environmental Hazards: Marine pollutant; notify authorities of any transport accident.
Transport Precautions: Use sealed, corrosion-resistant packaging; segregate from foodstuffs and incompatible materials; drivers and handlers need hazardous materials endorsement and training.
US OSHA: Covered as a hazardous chemical, subject to hazard communication requirements
US TSCA: Listed chemical; subject to reporting and record-keeping requirements
US SARA Title III: Listed as an extremely hazardous substance; requires emergency planning and notification
EU REACH/CLP: Recognized as a substance of very high concern (SVHC), subject to strict authorization regimes and workplace controls across Europe
Other International: Included on pollutant priority lists for Canada, Australia, and Japan. Controls for import, export, and usage widely in force.
Community Right-to-Know: Required public notification for significant on-site storage or accidental release
