Hydrogen chloride

Hydrogen chloride is a highly corrosive inorganic compound with the chemical formula ClH and CAS number 7647-01-0. This colorless gas has a molecular weight of 36.46 g/mol and is classified as a dangerous substance with corrosive properties (Skin Corr. 1B) and specific target organ toxicity (STOT SE 3). It readily dissolves in water to form hydrochloric acid and is characterized by its pungent, irritating odor that can be detected at very low concentrations.

Hydrogen chloride is a colorless gas at room temperature with a sharp, pungent odor that is highly irritating to mucous membranes. It has excellent solubility in water, forming hydrochloric acid solutions, and is also soluble in alcohols and ethers. The compound has a boiling point of -85°C and a melting point of -114°C. It is heavier than air with a density of approximately 1.49 g/L at standard conditions and exhibits strong corrosive properties toward metals and organic materials.

Hydrogen chloride is primarily used in the production of hydrochloric acid, which serves numerous industrial applications including metal cleaning, ore processing, and chemical synthesis. It plays a crucial role in manufacturing PVC plastics, pharmaceuticals, and various organic compounds through chlorination reactions. The compound is also essential in semiconductor manufacturing for etching processes, oil well acidizing operations, and as a catalyst in petrochemical processes. Additionally, it's used in food processing as an acidifying agent.

Hydrogen chloride requires strict safety measures due to its corrosive nature and classification as Skin Corr. 1B and STOT SE 3. Essential personal protective equipment includes chemical-resistant gloves, safety goggles, and respiratory protection with appropriate gas filters. Work should be conducted in well-ventilated areas or under fume hoods to prevent inhalation exposure. Emergency eyewash stations and safety showers must be readily accessible. The danger signal and GHS pictograms GHS05 and GHS07 indicate serious corrosive and health hazards requiring careful handling protocols.

Hydrogen chloride must be stored in tightly sealed, corrosion-resistant containers in cool, dry, well-ventilated areas away from direct sunlight and heat sources. Storage areas should be equipped with appropriate ventilation systems and gas detection equipment. The compound should be kept separate from metals, bases, and organic materials to prevent dangerous reactions. Containers must be properly labeled with danger warnings and GHS pictograms. Storage facilities should comply with local regulations for corrosive substances and maintain temperatures below 25°C when possible.

Hydrogen chloride exposure requires immediate emergency response due to its corrosive properties. For skin contact, immediately remove contaminated clothing and flush affected areas with large amounts of water for at least 15 minutes. In case of eye contact, rinse continuously with water and seek immediate medical attention. If inhaled, move the person to fresh air immediately and provide oxygen if breathing is difficult. For ingestion, do not induce vomiting and seek emergency medical care. All exposures require prompt medical evaluation due to potential serious tissue damage.

Hydrogen chloride disposal must comply with local and international waste regulations as it is classified as hazardous waste under ADR Class 8. Small quantities can be neutralized carefully with alkaline solutions under controlled conditions by trained personnel. Large quantities require disposal through licensed hazardous waste contractors. Never discharge directly into sewers, waterways, or soil. Waste containers must be properly labeled and stored in designated areas. Disposal methods should follow national waste management regulations and may require special permits for transportation and treatment.

Hydrogen chloride is classified under ADR Class 8 (corrosive substances) with Packing Group II, indicating high danger level during transport. It requires specialized packaging approved for corrosive gases and must be transported in vehicles equipped with appropriate safety equipment and ventilation systems. Transport documents must include proper shipping names, hazard classes, and emergency response information. Drivers must hold valid ADR certification for Class 8 substances. Emergency response equipment including neutralizing agents and protective equipment must be available during transport.

Hydrogen chloride is subject to comprehensive European regulations including REACH registration requirements and CLP classification as Skin Corr. 1B and STOT SE 3 with danger signal word. It is not currently listed as an SVHC (Substance of Very High Concern). The compound must comply with industrial emissions regulations, workplace exposure limits, and ADR transport requirements. Manufacturing and use may require specific permits and safety assessments. Companies handling hydrogen chloride must implement appropriate risk management measures and maintain safety data sheets compliant with current regulations.

Hydrogen chloride is available through OYSI, a specialized European distributor of industrial chemicals serving various sectors across Europe. OYSI provides high-quality hydrogen chloride with proper documentation, safety data sheets, and regulatory compliance support. As a professional chemical distributor, OYSI ensures reliable supply chains and technical support for industrial customers. For procurement, contact OYSI directly to discuss specific requirements, quantities, and delivery options. Professional buyers should provide appropriate documentation demonstrating legitimate industrial use and proper handling capabilities.