Arsenic acid

Arsenic acid is an inorganic compound with the chemical formula AsHO3 and CAS number 10102-53-1. It is a toxic arsenic compound with a molecular weight of 123.928 g/mol. This substance appears as white crystalline solid or colorless solution and is highly soluble in water. Arsenic acid is classified as a dangerous good for transport purposes due to its toxic properties.

Arsenic acid is typically found as white crystalline solid or forms colorless aqueous solutions. It is highly soluble in water and hygroscopic, meaning it readily absorbs moisture from air. The compound has a molecular weight of 123.928 g/mol and is odorless. It decomposes at high temperatures and is corrosive to metals in the presence of moisture.

Arsenic acid is primarily used in industrial applications including wood preservation treatments, manufacturing of arsenate salts, and as an intermediate in chemical synthesis. It serves as a precursor for producing other arsenic compounds and finds application in certain specialized analytical procedures. Due to its toxic nature, its use is heavily regulated and limited to professional industrial settings.

Arsenic acid requires strict safety measures including wearing full personal protective equipment: chemical-resistant gloves, safety goggles, face shield, and protective clothing. Work in well-ventilated areas or under fume hoods to avoid inhalation. Avoid skin and eye contact completely. Use appropriate containment measures and ensure emergency shower and eyewash stations are readily accessible. Only trained personnel should handle this substance.

Arsenic acid must be stored in tightly sealed, corrosion-resistant containers in a cool, dry, well-ventilated area away from incompatible materials. Keep containers in a secure area with restricted access due to toxicity concerns. Protect from moisture and ensure proper labeling. Store away from food, feed, and drinking water supplies. Regular inspection of containers for corrosion or leakage is essential.

Immediate action is critical for arsenic acid exposure. For skin contact, remove contaminated clothing and flush affected area with plenty of water for at least 15 minutes. For eye contact, rinse immediately with water for at least 15 minutes. If inhaled, move to fresh air immediately. If ingested, do not induce vomiting and seek immediate medical attention. Always contact poison control center or emergency services.

Arsenic acid disposal must comply with local, national, and EU hazardous waste regulations. This substance cannot be disposed of in regular waste streams due to its toxicity. Contact licensed hazardous waste disposal companies for proper treatment. Neutralization and treatment may be required before final disposal. Maintain detailed disposal records and ensure compliance with REACH and waste framework directive requirements.

Arsenic acid is classified under ADR as Class 6.1 (toxic substances), Packing Group II, indicating high toxicity requiring special transport precautions. It must be packaged in UN-approved containers with proper hazard labels and documentation. Transport vehicles require appropriate placarding and drivers need ADR training certification. Emergency response information must accompany shipments throughout the transport chain.

Arsenic acid is subject to extensive European regulations including REACH registration requirements, CLP classification and labeling, and various national restrictions due to its toxicity. It is not currently listed as an SVHC substance, but its use is heavily controlled. Industrial users must comply with occupational exposure limits, environmental discharge restrictions, and proper risk management measures under EU chemical legislation.

Arsenic acid is available through OYSI, a specialized European distributor of technical chemicals serving industrial customers across Europe. As a controlled toxic substance, it is only supplied to qualified industrial users with proper licenses and safety protocols. OYSI ensures full regulatory compliance and provides technical support for safe handling and application of this specialized chemical product.