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Product Name: Copper Dichromate
Chemical Formula: CuCr₂O₇
Synonyms: Chromic Acid, Copper(II) Salt; Copper(II) Bichromate
CAS Number: 13478-36-9
Recommended Use: Laboratory chemical, research applications, possible pigment and catalyst applications
Supplier Details: Name, address, phone number, and contact hours are understood to be listed on procurement paperwork; important to keep this information visible at storage site and inform team members
Emergency Number: Use numbers listed by your local regulations; in many settings, local poison control and chemical safety hotlines give quicker access to expert support in an emergency.
GHS Classification: Acute toxicity (oral, dermal, inhalation), skin corrosion/irritation, serious eye damage/irritation, carcinogenicity, specific target organ toxicity, aquatic toxicity
Pictograms: Skull and crossbones, exclamation mark, environment, corrosive, health hazard
Signal Word: Danger
Hazard Statements: May cause cancer; Harmful if swallowed, inhaled, or in contact with skin; Causes severe skin burns and eye damage; Causes serious eye damage; May cause damage to organs through prolonged or repeated exposure; Very toxic to aquatic life with long lasting effects
Precautionary Statements: Wear protective clothing, avoid breathing dust, prevent release to the environment, avoid contact with eyes and skin, do not eat, drink, or smoke when using the substance, wash thoroughly after handling, store locked up, seek medical assistance if exposed or if not feeling well.
Chemical Identity: Copper Dichromate
Chemical Formula: CuCr₂O₇
Common Impurities: May contain traces of other chromium or copper salts, potential water of hydration depending on manufacturing process
Concentration: 98-100% pure unless otherwise labeled; impurity profile should be available upon request from manufacturer
Relevant Impurity Effects: Trace chromium(VI) is known to be especially hazardous to health and environment; awareness of purity affects risk assessment and control approach.
Inhalation: Move affected person to fresh air, keep warm and at rest, seek medical attention if symptoms of respiratory distress occur, do not leave exposed person unattended, administer oxygen if available and trained
Skin Contact: Remove contaminated clothing immediately, wash skin thoroughly with soap and water for at least 15 minutes, pay attention to under fingernails and folds, seek medical attention for infection, burns, or persistent inflammation
Eye Contact: Rinse with plenty of water for at least 15 minutes, holding eyelids apart, remove contact lenses if present and easy to do, continue rinsing, seek immediate medical attention due to risk of eye damage
Ingestion: Rinse mouth with water if person is conscious, do not induce vomiting, seek immediate medical attention, never administer anything by mouth to an unconscious person
Advice for Doctor: Treat symptomatically, monitor for delayed effects caused by chromium(VI), consider chelation therapy for significant copper or chromium toxicity, routine blood/urine analysis for heavy metal poisoning may be needed in severe cases.
Suitable Extinguishing Media: Use water spray, dry chemical, foam, or CO₂, but beware that direct application may cause spreading of powder or contamination runoff
Unsuitable Extinguishing Media: Do not use straight water stream—risks spreading powder and contaminating water supply
Hazards from Combustion: Substance itself is not flammable, but chromium(VI) compounds release highly toxic and irritating fumes if heated to decomposition
Protective Equipment: Wear self-contained breathing apparatus, chemical-resistant suit, eye/face protection, and gloves, keep upwind and avoid breathing dust or fumes
Special Firefighting Procedures: Use caution to avoid spillage into drains or watercourses, stay clear of containers exposed to fire, cool with water spray to prevent bursting from heat.
Personal Precautions: Evacuate unnecessary personnel, ventilate area, prevent exposure by using chemical-resistant PPE including gloves, goggles, lab coat, face shield, and respirator as required
Environmental Precautions: Prevent release to soil, watercourses, drains, and sewers, cover drains and surround spill with absorbent barriers if feasible, notify authorities if large amounts reach environment
Cleanup Methods: Avoid creating dust, sweep up using tools designed for hazardous material collection, transfer to labeled container for safe disposal, decontaminate site with reducing agent such as sodium metabisulfite then rinse with plenty of water, methods like vacuum units with HEPA filtration are most effective for complete removal
Waste Disposal: See detailed disposal guidelines below, never dispose of with general or municipal waste streams; lab and facility managers must review local hazardous waste requirements.
Handling: Avoid all direct physical contact, work in well-ventilated area preferably within fume hood, avoid generation of airborne dust, use tools rather than hands whenever possible, keep containers closed when not in use, wash hands thoroughly after handling and before eating or drinking
Storage Conditions: Keep in tightly closed containers made from compatible materials, store in cool, dry, well-ventilated area away from acids, strong reducing agents, combustibles, food, and animal feed, maintain good housekeeping and clear signage, keep away from sources of heat, sparks, and direct sunlight, post hazard warning and emergency contact information
Storage Incompatibilities: Incompatible with acids (risk of toxic gas release), reducing agents (may cause violent reactions), organic materials, and other incompatible chemicals noted by regulatory or lab safety documents; never store beside food, drink, or personal items.
Occupational Exposure Limits: Use current OSHA, NIOSH, or ACGIH guidelines for chromium(VI) compounds and copper dust/mist; current limits tend to be 0.005 mg/m³ (chromium VI) and 1.0 mg/m³ (copper fumes/0.2 mg/m³ dust/mist) as 8-hour TWA; review SDS and update as regulations evolve
Engineering Controls: General and local exhaust ventilation, especially use of chemical fume hoods, sealed transfers, dedicated work stations, ongoing air monitoring and alarms for elevated chromium or copper dust levels, facilities should include emergency showers and eyewash stations
Personal Protection: Chemical-resistant gloves (nitrile, neoprene), safety goggles or full-face shield, lab coat and impervious apron, respiratory protection such as NIOSH-approved particulate respirator when airborne concentrations risk exceeding limits, closed-toed chemical-resistant shoes, no skin exposed
Hygiene Controls: Prohibit eating, drinking, and smoking in areas of use, ensure hand washing before breaks, do not wear contaminated clothing away from worksite; all PPE must be properly cleaned, replaced when worn, and disposed of in accordance with hazardous guidelines.
Physical State: Solid
Appearance: Deep green to dark blue crystalline powder
Odor: Odorless
Molecular Weight: 275.44 g/mol
Melting Point: Decomposes prior to melting
Solubility: Soluble in water, liberating dichromic acid and copper hydroxide under some conditions
Boiling Point: Not applicable (decomposes on heating)
Vapor Pressure: Not applicable (solid at room temperature)
Density: Approximately 3.1 g/cm³
pH (aqueous solution): Acidic
Other Properties: Not volatile, not explosive, not flammable, hazardous due to toxicity and oxidative properties.
Chemical Stability: Stable under standard laboratory conditions, but decomposes on strong heating or in contact with acids or strong reducing agents
Hazardous Reactions: Violent reaction with organic materials or reducing agents, releases highly toxic chromium(VI) compounds and potentially copper fumes on decomposition
Conditions to Avoid: Moisture, high temperatures, exposure to acids, reducing environments, friction or mechanical shock in quantity
Incompatible Materials: Acids, strong reducers, combustible substances, organic chemicals, many metals
Decomposition Products: Hexavalent chromium compounds, copper oxides, oxygen, water, toxic gases under fire conditions.
Acute Toxicity: Harmful or fatal upon inhalation, ingestion, or skin absorption; can cause burning, ulceration, and necrosis on contact
Chronic Exposure: Hexavalent chromium compounds are recognized carcinogens; repeated exposure leads to skin sensitization, ulceration, nasal perforation, kidney and liver damage, and increased cancer risk
Inhalation: Irritation and burning sensation of respiratory tract, coughing, shortness of breath, risk of long-term pulmonary damage
Ingestion: Severe abdominal pain, nausea, vomiting, systemic toxic effects including kidney and liver injury; possible death from sizable ingestion
Skin/Eye Contact: Causes severe irritation, ulcers, burns, and dermatitis; may lead to long-term dermatitis or skin cancer with repeated contact
Other Information: Copper and chromium are both essential and toxic at different concentrations, but this form is harmful and risk must be controlled.
Aquatic Toxicity: Extremely toxic to aquatic organisms, even at very low levels; contributes to long-term damage to aquatic environments
Mobility in Soil: Chromium(VI) is persistent and highly mobile, can leach into groundwater, hard to remediate
Persistence and Degradability: Chromium(VI) compounds resist breakdown; bioaccumulate and persist in sediment and living organisms
Bioaccumulation: Chromium and copper can build up in fish, invertebrates, and aquatic plants causing damage to food chains
Other Environmental Effects: Cr(VI) compounds are listed as hazardous pollutants under key environmental regulations; monitor and mitigate any release rapidly to avoid regulatory violation and lasting ecosystem damage.
Waste Management: Classified as hazardous waste; treat as heavy metal laboratory waste, use properly labeled, sealed, corrosion-resistant containers
Disposal Methods: Follow regulations for hazardous waste incineration and chemical deactivation of chromium(VI) where permitted; most settings require specialized disposal via licensed hazardous waste contractors
Do Not: Flush down the drain, mix with general trash, attempt treatment without appropriate technical knowledge and regulatory guidance
Notice for Facilities: Waste records, manifests, and proof of regulatory compliance must be retained and available on demand from authorities.
UN Proper Shipping Name: Environmentally hazardous substance, solid, n.o.s. (Contains chromium(VI) compounds, copper compounds)
UN Number: 3077
Transport Hazard Class: 9 (Miscellaneous dangerous substances and articles)
Packing Group: III
Hazard Labels: Class 9, environmental hazard, toxic substance stickers where required
Special Precautions: Prevent container damage or spillage, segregate from incompatible materials, verify documentation is complete and accurate, vehicles must be clean and drivers briefed on emergency procedures.
TSCA: Listed as hazardous under US Toxic Substances Control Act
OSHA: Covered under hazardous chemical standards; exposure to chromium(VI) triggers specific monitoring and training requirements
SARA Title III: Subject to reporting under Sections 302, 313 (toxic release inventory, emergency planning)
RCRA: Listed as hazardous waste under US Resource Conservation and Recovery Act; specific "F" and "P" codes may apply
REACH (EU): Chromium(VI) compounds face strong restrictions; user and importer must comply with REACH registration, restriction, and authorization procedures
Other International Regulations: Notified under Canadian WHMIS, EU CLP, Japanese Fire Service Act, and other global chemical safety rules – always check local requirements at point of use
Employee Training: Must include hazard communication, PPE use, emergency procedures, spill response, and medical surveillance for health effects associated with Cr(VI); record-keeping and proof of training are mandatory for regulatory compliance.
