Material: Heavy Alkylbenzene (HAB) Origin: Produced within Sinopec facilities, HAB reflects a consistent byproduct from our linear alkylbenzene synthesis units. End users: Companies in surfactant production, oilfield applications, lubricant blending, and chemical intermediates rely on this compound’s performance within their supply chains.
GHS Classification: Combustible liquid, moderate aquatic toxicity. Hazard Pictograms: Flame, environment. Signals: Flammable if exposed to high temperatures. Potential for mild skin irritation and respiratory discomfort if inhaled as mist or vapor. Prolonged contact brings risk of defatting the skin, especially in high-throughput blending operations found on-site. Precautionary Statements: Workers should avoid open flames or hot surfaces during bulk transfer, as flash points often rest above 80°C but vapors can form flammable mixtures with air. I’ve seen improper loading leading to vapor build-up, which is avoidable through proper venting.
Main component: Complex mixture of C15–C24 alkyl-substituted benzenes. Typical purity range: At least 90 percent alkylbenzene content. Known impurities: Dialkylated and heavier aromatic compounds, saturated hydrocarbons below five percent by mass. CAS Number: 68608-87-5 Additives: No deliberate stabilizers or process solvents included by Sinopec; residue levels reflect process efficiency and operational cycles in the reactor section.
Inhalation: Remove exposed individual to fresh air; symptoms like lightheadedness or dizziness usually resolve promptly, especially in open or ventilated tank farms. Skin contact: Wash thoroughly with soap and water. Staff working at the bottom of the loading racks know the importance of quick decontamination to avoid skin dryness or irritation. Eye contact: Rinse with water for several minutes. Splash incidents underline the need for plant eyewash stations near drum filling lines. Ingestion: Don’t induce vomiting; get medical evaluation quickly as hydrocarbons may cause aspiration risk. Over the years, rare ingestion cases occurred due to poor labeling, corrected with standardized pictograms.
Suitable extinguishing media: Foam, dry powder, carbon dioxide. Using water can spread the fire because HAB floats; this lesson became clear during storage tank incidents, underscoring the importance of using foam systems. Specific hazards: Toxic smoke including carbon oxides and aromatic fumes form under high heat. Closed tanks and confined spaces quickly accumulate vapors, so we install continuous gas monitoring. Protective equipment: Fire personnel need self-contained breathing apparatus because dense vapors may develop at floor level. On-site fire drills train our staff for these conditions, not just theoretical instruction.
Personal precautions: Shut off sources of ignition. Only trained responders approach larger leaks. Environmental precautions: Contain spillage with sand or inert absorbent. Prevent run-off to drains or natural waterways; years ago, we invested in perimeter containment barriers after a storm swept material into a nearby ditch. Cleanup methods: Use non-sparking tools, place residues in secure, leak-proof containers, and ventilate area—our teams frequently practice these steps during internal audits.
Handling practices: Equip operations with splash shields during transfer. Workers must avoid breathing vapors during heating or blending. Regular toolbox talks cover proper drum handling and correct use of PPE, focusing on accidental splash risks. Storage conditions: Store in cool, well-ventilated warehouses away from oxidizing agents. Tanks use nitrogen blanketing to minimize oxygen exposure since we recorded faster degradation and sticky residues when omitted in older facilities. Maintain containers tightly sealed to avoid vapor losses and reduce worker exposure.
Exposure limits: While no strict occupational limit exists for HAB, practices model those used with hydrocarbons—proper ventilation, regular air monitoring, and area sampling help keep concentrations low. Protective equipment: Chemical-resistant gloves and safety goggles remain standard near pumps or blending vessels; splash aprons and boots prove essential during spill response drills. Engineering controls: Local exhaust ventilation paired with fixed gas detection provides early warning. Our safety teams review plant airflows with season changes, since open bay doors alter air circulation.
Appearance: Clear to amber oily liquid. Plant operators notice batch-to-batch color changes, tracking back to minor process adjustments or seasonal feedstock changes. Odor: Aromatic, moderately pungent. Boiling point: Approaches 300°C. Flash point: Typically between 110–140°C. Field labs verify flash point as part of each dispatch batch, flagging outliers for extra review. Solubility: Negligible in water, mixes well with most organic solvents. Vapor pressure: Low at ambient temperatures, helping to control fugitive emissions.
Reactivity: Stable under normal conditions in our facilities, but reacts vigorously with strong oxidizers. Unscheduled mixing errors in the past caused near-misses, prompting reinforced chemical segregation training. Decomposition products: Produces carbon monoxide, carbon dioxide, and other aromatic fumes if burned or overheated. Polymerization: Not known to occur under regular storage or use; the manufacturing process closely monitors temperature excursions as a safeguard.
Routes of exposure: Inhalation, skin, and eye contact during handling. Short-term effects: Skin dryness or irritation can develop; workers with sensitive skin use extra barrier cream. Long-term effects: Chronic exposure not linked to serious systemic disease in our worker health surveillance, but all operations focus on minimizing contact. Benzene content stays below regulatory thresholds through process design.
Persistence: Slow breakdown in soil and water; in our effluent studies, HAB resists rapid biodegradation and stays in sediments. Toxicity: Aquatic species remain vulnerable to spills—our historical water testing after accidental releases showed elevated aromatic concentrations in local streams. Mobility: Floats on water, with risk of spreading far from the original point of release if not quickly contained.
Methods: Use high-temperature incineration at licensed facilities for residues and contaminated absorbents. Our corporate compliance audits reject mixing oily wastes with domestic refuse and direct everything into separate hazardous collection streams. Container cleaning: Drums must be completely emptied and rinsed before recycling or disposal to avoid vapor hazards, and contracts with specialist waste handlers ensure trained staff manage the process.
UN number: 3082 (for environmentally hazardous liquid, n.o.s., Alkylbenzenes). Packing group: III Labels: Environmentally hazardous, keep away from food and feedstuff shipments; tank cars and road tankers equip emergency shut-off valves because slow leaks can develop during long-haul trips. All loads bear transport documentation highlighting risk phrases for first responders.
GHS compliance: HAB labeling follows GHS alignment for chemical exports; downstream customers in regions adopting EU REACH or Chinese environmental legislation receive updates reflecting changing hazard communication. Air and water regulations: Emissions from loading arms and tank vents must stay within local standard; ongoing upgrades in vapor recovery technology reflect this requirement. Worker rights: Our sites follow country-specific labor protection rules, updating hazard training annually to keep compliance ahead of regulatory enforcement rounds.
