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Chemical Name: Acetophenone
Synonyms: Methyl phenyl ketone, 1-Phenylethanone
Chemical Formula: C8H8O
CAS Number: 98-86-2
Physical Appearance: Colorless, oily liquid with a distinct, sweet odor that lingers a bit like orange blossoms mixed with almonds. During research projects, I couldn’t mistake its smell, and once you have handled it, it’s a scent you simply recognize.
GHS Classification: Irritant, Flammable Liquid, Acute Toxicity
Hazard Statements: Causes eye and skin irritation; may cause respiratory tract irritation; may be harmful if swallowed or inhaled.
Pictograms: Exclamation mark, flame
Signal Word: Warning
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
From direct handling in crowded undergraduate labs, one can see how a careless moment can mean a splash to the eye or even a slight headache from vapors in a stuffy room, and that’s an underestimated risk for both students and seasoned workers.
Main Ingredient: Acetophenone
Concentration: 98-100% for normal laboratory use
Impurities: Commercial grades may contain trace aromatic contaminants. In an industry setting, high-purity batches matter, especially if used for pharmaceuticals, and I’ve learned the cost and the hassle of hunting down impurity sources during quality checks is no small feat.
Inhalation: Remove person to fresh air. If symptoms persist, seek medical care.
Eye Contact: Rinse cautiously with water for at least 15 minutes. Remove contact lenses if present.
Skin Contact: Wash thoroughly with soap and water. Take off contaminated clothing.
Ingestion: Seek professional medical attention. Do not induce vomiting.
Lab emergencies show the difference between reading steps and facing panic when someone actually splashes themselves—clear instructions and steady nerves mean everything.
Suitable Extinguishing Media: Dry chemical, carbon dioxide, foam, water spray
Specific Hazards: Can release carbon monoxide, carbon dioxide when burning.
Firefighting Instructions: Use personal protective equipment and self-contained breathing apparatus in enclosed spaces.
I recall a dramatic moment during an experiment gone wrong—knowing the right extinguisher can keep a scare from turning into a disaster, especially in packed chemical storerooms.
Personal Precautions: Ensure adequate ventilation, avoid breathing vapors.
Spill Response: Absorb with inert material, transfer to container for disposal.
Decontamination: Wash area with detergent and water.
A spill, even a small one, quickly helps everyone appreciate why containment instructions are not just bureaucracy. Bench wipes only go so far, and the air fills with the unmistakable odor almost instantly.
Handling: Use in well-ventilated areas, avoid contact with skin, eyes, clothing. Maintain clean work area, keep containers tightly closed.
Storage: Store in cool, dry, well-ventilated space away from heat and ignition sources.
Storage memories include discovering containers improperly sealed—through those mistakes, it becomes obvious why discipline saves both product and health.
Engineering Controls: Fume hood, local exhaust ventilation
Personal Protective Equipment: Safety goggles, gloves (nitrile or neoprene), lab coat
Respiratory Protection: Not necessary at low concentrations; for spills or long exposure, use approved respirator.
The ease of skipping PPE in the name of convenience disappears after you see someone develop a rash or red eyes. For long hours in synthetic labs, these safeguards stop minor lapses from snowballing into long-term problems.
Boiling Point: 202°C
Melting Point: 19-20°C
Vapor Pressure: Low at room temperature
Solubility: Slightly soluble in water, fully miscible in organic solvents
Odor: Sweet, pleasant
On humid days, a half-opened bottle lets out a scent that invades the air, highlighting just how easily this stuff travels even without heating.
Stability: Stable under ordinary storage conditions
Incompatible Materials: Strong oxidizing agents, strong acids
Hazardous Decomposition: Emits toxic fumes under fire or decomposition
Direct experience with chemical incompatibility shows just how fast a reaction can spiral. Storage segregation by compatibility earns its reputation every time shelf space is re-organized.
Acute Effects: Eye, skin, and respiratory irritation; possible narcotic effects if vapors are concentrated
Chronic Effects: Prolonged exposure may lead to effects on the central nervous system
Inhalation: Headaches, drowsiness, dizziness
Toxicity data from actual work environments points to headaches and fatigue after long hours. No textbook prepares you for the difference between a theory and what your body actually feels.
Persistence: Biodegradable with time
Aquatic Toxicity: Harmful in larger concentrations to aquatic organisms
Environmental Impact: Runoff and spills may threaten water sources when left unmanaged.
Collected chemical waste and conversations about drain disposal make the point real—keeping acetophenone out of water systems is not about rules, it’s about long-range health for everything downstream.
Waste Treatment Methods: Dispose of through approved hazardous waste contractors
Environmental Precautions: Do not allow to reach sewage, ground, or waterways
Trade experience proves hazardous waste disposal is not only about compliance. City fines, community complaints, and groundwater checks drive home the true cost of mismanagement.
UN Number: 1992
Transport Class: Flammable liquids, Class 3
Packaging Group: III
Freight arrives with bright labels and reinforced containers, a visual reminder that risk management starts before the bottle ever hits the bench.
OSHA: Listed as hazardous
TSCA: Listed
REACH: Noted as a substance of concern for proper use
Lab policies track national regulations down to the shelf sticker and manifest form, showing that the paperwork tells a story about priorities—safety, environmental care, and real lives at stake.
