Chemical identity: Isophthalic Acid Common name: IPA CAS number: 121-91-5 Appearance: White crystalline powder Odor: Odorless Primary use: Essential intermediate in polyester and resin manufacturing Solubility: Slightly soluble in water, soluble in alcohols and acetone Manufacturing site: Large-scale process through oxidation of m-xylene
Hazard class: Eye and respiratory irritant Routes of exposure: Inhalation of dusts, skin and eye contact Acute effects: Eye irritation, coughing, skin redness Long-term: No evidence of chronic toxicity in standard industrial exposure scenarios Potential for dust explosion exists in specific industrial conditions Environmental hazard: Low persistent risk due to limited mobility and non-volatility
Main ingredient: Isophthalic acid (>99%) Minor impurities: m-Toluic acid, benzoic acid (trace level, from upstream oxidation processes) No added solvents or additives during packaging Single component product – no hazardous stabilizers or solvents
Eye contact: Rinse cautiously with water, remove contact lenses, continue rinsing, seek medical help for persistent discomfort Skin contact: Remove contaminated clothing, rinse skin with soap and water Inhalation: Move to fresh air, watch for respiratory irritation, consult medical attention if symptoms continue Ingestion: Rinse mouth thoroughly, drink water if conscious, medical consultation recommended if large amounts ingested No specific antidote, symptomatic treatment only Preparedness relies on accessible wash stations and clear staff training
Fire hazard: Combustible dust risk in certain conditions, typically stable as bulk solid Extinguishing media: Water spray, foam, dry chemical Combustion products: Carbon monoxide and carbon dioxide, possible aromatic fumes Protective equipment: Self-contained breathing apparatus for large fires, avoid inhaling smoke or decomposition gases Prevent dust cloud formation in storage and transport areas Process modifications: Dependable dust collection and explosion venting in milling or bulk-transfer zones
Personal protection: Dust mask or respirator, goggles, protective gloves Prevent further spill by stopping source at conveyor, bagging or process valve Spill cleanup: Sweep or shovel solid material, avoid creating airborne dust, dispose into sealed containers Release to water: Not expected in closed-loop processes, but rapid containment with absorbent barriers if needed Prevent discharge to drains where possible Staff must use grounded tools and wear anti-static footwear to reduce ignition hazard
Handling: Avoid open handling in confined spaces to reduce dust, use enclosed transfer lines, closed feeding systems Storage: Store in dry, cool, well-ventilated area away from oxidizing agents, maintain stable temperature Bulk silos require dust extraction and level monitoring Standard packaging: Multi-layer bags or heavy-duty drums with inner liners Housekeeping critical: Regular cleaning schedules reduce dust buildup Mechanical handling: Automatic conveyors with dust containment preferred
Engineering controls: Dust extraction, local exhaust ventilation at bagging and transfer points Personal protection: Safety goggles, chemical-resistant gloves, N95 or similar respirator for bulk work Workplace limits: Keep airborne concentration below threshold levels (typical industry guidance: 10 mg/m³ total particulates) No biological exposure indices established, so focus is on process design Hygiene: No eating, drinking, or smoking in production or transfer areas Mandatory hand washing before and after entering work zones
Appearance: White, odorless, crystalline powder Melting point: Around 345°C Boiling point: Decomposes, does not boil at atmospheric pressure Density: 1.53 g/cm³ Solubility: Slightly soluble in water (approx. 70 mg/L at 25°C) Partition coefficient (octanol/water): Estimated low Flash point: Dust cloud ignition at ~540°C Stable under normal industrial conditions
Stability: Stable under normal conditions if kept dry and away from strong oxidizers Hazardous reactions: None observed during thousands of operating hours in plant environment Decomposes above 300°C producing carbon oxides Not sensitive to shock or static in non-dusty environments, but dust clouds may ignite Recommended to avoid mixing with strong alkalines or oxidizing agents in process areas
Acute oral toxicity: Low (rat LD50 above 5000 mg/kg) Acute inhalation: Dust irritant, no reported lethal exposures in plant operations Skin sensitation: Not documented in typical exposure scenarios No known mutagenic, carcinogenic or reproductive toxicity under industrial usage Workers undergo regular health monitoring, with no evidence of occupational illness linked to routine handling Irritant threshold: Consistent with standard organic acid exposure levels
Aquatic toxicity: Low, short-term exposure not expected to harm aquatic life at standard discharge concentrations Persistence: Biodegradable in natural environments over extended periods Bioaccumulation: Unlikely due to low lipid solubility Environmental release: Modern plant design prevents process discharge, closed-loop water systems in place Spills: Rapid cleanup and reporting procedures practiced Compliance: Regular emissions monitoring confirms low impact
On-site neutralization: Not required, product stable, non-corrosive Waste from spills: Collected and incinerated or handled as non-hazardous solid per local legislation Disposal method: Preferably by authorized waste handlers, incineration or controlled landfill Avoid direct release to waterways Packaging: Reusable or recyclable where possible, bulk material returns system available for local clients Documentation required for all waste movements
Transport regulation: Not regulated as a dangerous good for land, sea or air under current global codes Packaging: Sealed, tamper-evident, robust to prevent dust leakage Hazards: Dust explosion risk in bulk, not in packaged goods Handling: Equipment must prevent rough handling, trampling, and overfilling Training: Drivers and logistics staff receive regular onboarding for chemical handling Clear labelling with product name and hazard information
Compliance: Registered with all relevant national chemical authorities Workplace: Subject to standard occupational hygiene requirements REACH/TSCA/IECSC reporting: Fully registered and tracked No workplace exposure limit infringement documented in compliant plants Environmental permits: Continuous monitoring, emission reporting submitted to local agencies Active member in industry safety and stewardship initiatives
