Arsenic

Arsenic is a naturally occurring metalloid element with the chemical symbol As and atomic number 33. This toxic substance appears as a gray, brittle solid in its pure form and has been known since ancient times. With a molecular weight of 74.92159 g/mol, arsenic exhibits both metallic and non-metallic properties, making it useful in various industrial applications despite its high toxicity to humans and environmental organisms.

Arsenic is a gray, brittle metalloid solid at room temperature with no characteristic odor. It has a density of 5.727 g/cm³ and sublimes at 616°C without melting under normal atmospheric pressure. The element is poorly soluble in water but dissolves in acids and alkalis. It exists in several allotropic forms, with the gray metallic form being the most stable and common variant used in industrial applications.

Arsenic is primarily used in the semiconductor industry for manufacturing gallium arsenide compounds in electronic devices and solar cells. It serves as an alloying agent in lead-based materials to improve hardness and corrosion resistance. Additionally, arsenic compounds are utilized in wood preservatives, pesticides, and specialized glass production. The pharmaceutical industry also uses certain arsenic compounds in specific medical treatments, though this application is highly regulated due to toxicity concerns.

Arsenic must be handled with extreme caution using appropriate personal protective equipment including respirators, chemical-resistant gloves, and protective clothing. Work should be conducted in well-ventilated areas or under fume hoods to prevent inhalation exposure. Direct skin contact must be avoided at all costs, and eating, drinking, or smoking in work areas is strictly prohibited. Regular health monitoring and proper training are essential for personnel handling this highly toxic substance.

Arsenic must be stored in tightly sealed containers in a cool, dry, well-ventilated area away from incompatible materials such as strong oxidizers and acids. Storage areas should be secure and accessible only to authorized personnel with proper training. The storage location must be clearly labeled with appropriate hazard warnings and equipped with emergency response materials. Regular container inspections are necessary to ensure integrity and prevent environmental contamination.

Arsenic exposure requires immediate emergency response depending on the contact route. For skin contact, remove contaminated clothing and rinse the affected area with plenty of water for at least 15 minutes. If inhaled, move the person to fresh air immediately and seek medical attention. In case of ingestion, do not induce vomiting and contact poison control immediately. All exposure incidents require prompt medical evaluation due to arsenic's severe toxicity and potential for systemic poisoning.

Arsenic disposal must comply with strict hazardous waste regulations and cannot be disposed of with regular waste. The material must be collected by licensed hazardous waste disposal companies and treated at specialized facilities. Contaminated materials, containers, and protective equipment must also be handled as hazardous waste. Proper documentation and waste tracking are required throughout the disposal process to ensure environmental protection and regulatory compliance.

Arsenic is classified as dangerous goods under ADR regulations as Class 6.1 (toxic substances) Packing Group II. Transportation requires proper UN-approved packaging, hazard labels, and shipping documentation. Drivers must have appropriate dangerous goods training certificates, and vehicles must carry emergency response information. The transport must follow designated routes and comply with quantity limitations and segregation requirements to ensure public safety during transit.

Arsenic is heavily regulated under multiple European frameworks including REACH, CLP, and various national restrictions due to its high toxicity. The substance requires registration under REACH for commercial use and is subject to strict occupational exposure limits. Environmental discharge is regulated under water and air quality directives, and its use in consumer products is severely restricted or banned in many applications to protect public health.

Arsenic is available through OYSI, a specialized European distributor of technical chemicals serving industrial customers across the continent. As a regulated toxic substance, arsenic sales are restricted to qualified industrial users with proper licenses and safety protocols. OYSI ensures compliance with all regulatory requirements and provides technical support for safe handling. Contact OYSI directly to discuss your specific requirements and verify regulatory compliance for your intended application.