Disodium;hexafluorosilicon(2-)

Disodium hexafluorosilicate is an inorganic chemical compound with the molecular formula F6Na2Si and CAS number 16893-85-9. This substance has a molecular weight of 188.055 g/mol and belongs to the fluorosilicate family. It is classified as a toxic substance under the GHS system with Acute Toxicity Category 3 classification across multiple exposure routes, requiring careful handling and appropriate safety measures in industrial applications.

Disodium hexafluorosilicate is typically a white crystalline solid at room temperature with good water solubility. As a fluorosilicate compound, it contains six fluorine atoms bound to a silicon center with two sodium cations balancing the charge. The substance is stable under normal conditions but may release toxic fluoride compounds when heated or in contact with acids. Its ionic nature makes it highly soluble in polar solvents like water.

Disodium hexafluorosilicate is primarily used in industrial applications including water fluoridation processes, metal surface treatment, and as a component in specialized chemical formulations. It serves as a source of fluoride ions in various industrial processes and can be used in the production of other fluorine-containing compounds. The substance also finds applications in certain glass etching processes and specialized cleaning formulations where controlled fluoride release is required.

Disodium hexafluorosilicate requires careful handling due to its Acute Toxicity Category 3 classification and GHS06 pictogram designation. Personnel must wear appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and respiratory protection when handling this substance. Work should be conducted in well-ventilated areas or under local exhaust ventilation. Avoid contact with skin, eyes, and respiratory system, and ensure emergency procedures are readily available.

Disodium hexafluorosilicate should be stored in tightly sealed containers in a cool, dry, and well-ventilated area away from incompatible materials. Keep containers away from heat sources and direct sunlight. The storage area should be equipped with appropriate spill containment measures and emergency equipment. Ensure proper labeling with hazard identification and maintain an inventory system. Store separately from strong acids and oxidizing agents to prevent dangerous reactions.

In case of skin contact with disodium hexafluorosilicate, immediately remove contaminated clothing and flush the affected area with plenty of water for at least 15 minutes. For eye contact, rinse immediately with clean water for at least 15 minutes while holding eyelids open. If inhaled, move the person to fresh air immediately. In case of ingestion, do not induce vomiting and seek immediate medical attention. Always consult a physician and provide the safety data sheet.

Disodium hexafluorosilicate must be disposed of as hazardous waste in accordance with local, national, and international regulations. Contact licensed waste disposal companies specialized in handling toxic chemical substances. Do not discharge into sewers, waterways, or soil. Contaminated packaging should also be treated as hazardous waste. Ensure proper documentation and tracking of waste disposal activities. Consider neutralization or treatment options where appropriate and legally permitted.

Disodium hexafluorosilicate is classified under ADR Class 6.1 (Toxic substances) Packing Group III for transportation purposes. It requires appropriate hazardous goods packaging, labeling, and documentation for road transport. Vehicles must carry proper placards and emergency response information. Drivers need ADR certification for Class 6.1 substances. Ensure compliance with international transport regulations including proper packaging instructions and quantity limitations for different transport modes.

Disodium hexafluorosilicate is subject to various regulatory frameworks including REACH registration requirements in Europe and CLP classification as Acute Tox. 3 with Danger signal word. The substance is not currently listed as a Substance of Very High Concern (SVHC). Compliance with occupational exposure limits, proper labeling according to GHS standards, and safety data sheet provisions are mandatory. Users must ensure regulatory compliance in their specific jurisdictions and applications.

Disodium hexafluorosilicate is available through OYSI, a specialized European distributor of technical chemicals. OYSI provides this substance to industrial customers across Europe with proper documentation, safety data sheets, and regulatory compliance support. As a professional chemical distributor, OYSI ensures quality standards and can provide technical support for industrial applications. Contact OYSI directly for availability, specifications, and delivery options to your location within Europe.