Disodium;oxido-(oxido(dioxo)chromio)oxy-dioxochromium

Disodium dichromate is an inorganic chemical compound with the formula Cr2Na2O7 and CAS number 10588-01-9. This chromium-based salt has a molecular weight of 261.97 g/mol and appears as orange-red crystalline solid. It is classified as a highly hazardous substance with multiple dangerous properties including oxidizing, carcinogenic, mutagenic, and toxic effects. The compound is widely used in industrial applications but requires strict safety measures due to its severe health and environmental risks.

Disodium dichromate is an orange-red crystalline solid that is highly soluble in water, forming bright orange solutions. The compound is hygroscopic, meaning it readily absorbs moisture from air. It has a molecular weight of 261.97 g/mol and decomposes at high temperatures rather than melting normally. The substance is odorless and has strong oxidizing properties, making it reactive with organic materials and reducing agents.

Disodium dichromate is primarily used as an oxidizing agent in various industrial processes including metal treatment, leather tanning, and chromium plating operations. It serves as a corrosion inhibitor in cooling systems and as a laboratory reagent for analytical chemistry. The compound is also utilized in the production of other chromium compounds and pigments. Due to its hazardous nature, its uses are increasingly restricted and regulated in many applications.

Disodium dichromate must be handled with extreme caution using full personal protective equipment including chemical-resistant gloves, safety goggles, and respiratory protection. Work should be conducted in well-ventilated areas or under fume hoods to prevent inhalation. Avoid skin contact and ingestion at all costs due to its carcinogenic and toxic properties. Use non-sparking tools as the substance is an oxidizer, and ensure emergency wash stations are readily available.

Disodium dichromate must be stored in a cool, dry, well-ventilated area away from heat sources and direct sunlight. Keep containers tightly sealed and separate from incompatible materials such as organic compounds, reducing agents, and flammable substances due to its strong oxidizing properties. Storage areas should have appropriate containment systems and restricted access. The substance should be kept in original containers with proper labeling and stored according to local regulatory requirements.

In case of skin contact with disodium dichromate, immediately flush the affected area with large amounts of water for at least 15 minutes and remove contaminated clothing. If inhaled, move to fresh air immediately and seek medical attention. For eye contact, rinse continuously with water and seek immediate medical care. If ingested, do not induce vomiting and seek emergency medical treatment immediately. Always consult a physician promptly due to the substance's severe toxicity.

Disodium dichromate must be disposed of as hazardous waste through authorized waste management companies specializing in chromium compounds. The substance cannot be disposed of in regular waste streams or sewers due to its toxic and carcinogenic properties. Disposal must comply with local environmental regulations and may require specific treatment processes. Small quantities should be neutralized and treated by qualified professionals before final disposal to prevent environmental contamination.

Disodium dichromate is classified under ADR transport regulations as Class 5.1 (Oxidizing substances), Packing Group II. Transport requires proper UN specification packaging, appropriate labeling with GHS pictograms (GHS03, GHS08, GHS06, GHS05, GHS09), and accompanying transport documents. Vehicles must carry appropriate emergency equipment and drivers need hazardous materials training. The substance must be segregated from incompatible materials during transport and handled by qualified personnel.

Disodium dichromate is subject to extensive regulations under REACH, CLP, and various national chemical safety laws due to its classification as carcinogenic, mutagenic, and toxic. The substance requires safety data sheets, exposure assessments, and may need authorization for certain uses. Workers handling this compound must receive specialized training and health monitoring. Many jurisdictions have implemented restrictions or bans on its use in consumer products and specific industrial applications.

Disodium dichromate can be purchased from OYSI, a specialized European distributor of technical chemicals serving industrial customers across Europe. As a regulated hazardous substance, it is only available to qualified industrial users who can demonstrate proper handling capabilities and regulatory compliance. OYSI provides technical support and ensures proper documentation for legal procurement. Contact OYSI directly to discuss availability, specifications, and regulatory requirements for your specific application.