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Chemical Name: Isobutyric acid
Appearance: Clear, colorless liquid with a strong, sour odor reminiscent of cheese or sweat
Chemical Formula: C4H8O2
Common Uses: Flavors, pharmaceuticals, solvents, fragrances, sometimes in organic synthesis
Odor Threshold: Easy to detect by nose even at low levels in air thanks to its sharp smell
Classification: Corrosive, Irritant
Health Hazards: Causes skin burns and serious eye damage, triggers respiratory irritation, may cause coughing and throat soreness even at low concentrations
Flammability: Highly flammable in both liquid and vapor forms, catches fire easily
Main Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Symptoms: Redness, pain, excessive watering of the eyes, coughing, sore throat, possible burns on skin with direct contact
Ingredient: Isobutyric acid (CAS No. 79-31-2), purity typically around 99% in commercial forms, impurities rarely present at significant levels in lab or industrial containers
Inhalation: Move the person into fresh air, keep breathing shallow and calm, seek medical attention if symptoms persist
Skin Contact: Remove any contaminated clothing right away, rinse skin with plenty of water for at least fifteen minutes, medical attention advised for any sign of burns
Eye Contact: Flush eyes gently with water for at least fifteen minutes, lifting eyelids from time to time, prompt medical care needed
If Swallowed: Do not induce vomiting, rinse mouth out carefully, get medical help quickly to prevent longer-term harm
Flammability: Burns with a fierce, almost invisible flame, making it tougher to spot fires during emergencies
Suitable Extinguishing Media: Use dry chemical, carbon dioxide, or alcohol-resistant foam, avoid using a water jet
Special Hazards: May give off acrid smoke, irritating fumes, and carbon monoxide if burned
Protective Equipment: Firefighters should wear full gear with self-contained breathing apparatus due to potential for toxic gas release
Personal Precautions: Limit exposure by wearing gloves and goggles, and stop the spread of fumes with proper ventilation
Spill Response: Dike area for larger spills, neutralize the acid with sodium bicarbonate if available, scoop up with non-sparking tools
Cleanup: Collect absorbed liquid in a tightly-sealed container for proper disposal, always wash any touched areas thoroughly after handling
Environmental Caution: Prevent runoff into drains, groundwater, or soil, as this chemical does actual harm to aquatic floors and may persist locally
Safe Handling: Wear chemical splash goggles, resistant gloves, and always work with good ventilation, keep away from sparks or sources of ignition
Storage Conditions: Store in a cool, ventilated spot with tightly closed containers, away from direct sunlight, acids, oxidizers, and open flame
Container Materials: Keep only in containers made for acids, as plastics or glass usually work best with isobutyric acid
Other Precautions: Label storage vessels clearly and avoid stacking or bumping containers to reduce the risk of accidental spills or leaks
Engineering Controls: Fume hood or exhaust fans make a huge difference for air quality, local sources of ventilation near workstations improve comfort
Personal Protective Equipment: Wear splash goggles, acid-resistant gloves (such as nitrile or butyl rubber), chemical-resistant apron, and use a respirator if airborne levels climb
Hygiene Measures: Always wash hands and face before eating, drinking, or smoking after using isobutyric acid—the risk of lingering acid burns rarely pays off
Boiling Point: Typically around 155°C
Melting Point: Freezes close to -47°C
Vapor Pressure: Moderate, creates vapors at room temperature
Solubility: Mixes well with water, ethanol, and ether
Density: Close to 0.96 g/cm³ at room temperature
Odor: Strong, sharp, sour—often flagged as distinct and unpleasant
Flash Point: Roughly 64°C, so well within the range for concern in warmer workplaces
Chemical Stability: Holds up well under standard conditions, but reacts with oxidizers to release heat and potentially dangerous products
Hazardous Reactions: With bases or metals, forms flammable hydrogen gas and heat
Conditions to Avoid: Open flames, heat sources, contact with strong oxidizing agents or alkalis
Decomposition Products: Carbon monoxide, carbon dioxide, and acrid smoke during combustion
Acute Effects: Strong irritant for eyes, skin, and respiratory tract, may cause burns with direct contact
Chronic Effects: Extended or repeated contact can dry or crack the skin, may also increase sensitivity to other chemicals
Ingestion Risks: Cough, vomiting, stomach pain, even chemical pneumonia if swallowed in large amounts
Inhalation Risks: Coughing, wheezing, may lead to headaches or dizziness after short exposures to high concentrations
Environmental Impact: Recognized as harmful to aquatic animals and plants, acts as a significant source of local water pollution unless contained
Persistence: Breaks down over time through standard bacterial processes, but can disrupt natural balances if present in larger quantities
Bioaccumulation: Less likely due to quick breakdown, yet the initial dose harms small water creatures and fish
Waste Disposal: Small lab quantities generally neutralized with soda or lime and then rinsed with lots of water, larger industrial amounts collected by trained professionals for hazardous waste processing
Don't Pour Down Drain: Prevent direct entry into sewers and local waterways, as this can cause major ecological trouble
Container Disposal: Rinse containers thoroughly before discarding, follow local and federal rules for hazardous waste disposal
Transportation Risks: Flammable and corrosive, so containers must remain leak-proof and clearly labeled during shipping
Packaging: Only containers meant for acids and flammable liquids should be used
Accident Response: Any spillage during transport should be reported and cleaned up right away, minimizing harm to environment and people in the area
Labeling: Clear hazard communication labels featuring corrosive and flammable symbols required
Regulated by: Most jurisdictions classify it as hazardous, imposing strict rules for workplace handling, transportation, and disposal
Documentation: Employers and suppliers must keep up-to-date safety paperwork, train workers, and post hazard warnings near work areas
