Benzyl Benzoate: A Clear Look at Its Material Safety Data Sheet

Identification

Name: Benzyl Benzoate
Chemical Formula: C14H12O2
Common Uses: Known as a treatment for scabies, a fragrance ingredient, and a plasticizer
Appearance: Clear, colorless, or slightly yellow oily liquid
Odor: Faint, balsamic, sweetish
Boiling Point: Around 323°C
Solubility: Poorly soluble in water; mixes well with organic solvents
CAS Number: 120-51-4
People working with essential oils or treating textiles have come across this compound plenty of times, so most folks handling it get acquainted fast with its slick, oily feel and mild scent. Some may remember its sticky residue after working in old-school pharma labs.

Hazard Identification

Classification: Harmful if swallowed or inhaled, Skin and eye irritant
Label Elements: GHS07—Exclamation Mark
Acute Health Effects: Causes eye redness, and skin irritation shows up as itching or burning. Ingestion brings nausea and abdominal pain. In workers handling undiluted quantities or spill cleanups, headaches and dizziness have cropped up before. Eyes become watery if the wind blows even a small splash.
Chronic Effects: Extended skin exposure can result in dermatitis. Studies haven’t shown it to cause cancer. No strong evidence for inhalation causing permanent lung trouble, so most worry is about immediate irritation and not long-term poisoning.
Environmental Hazard: Toxic to aquatic life, even at low concentrations. Spills make their presence known by floating on water and sticking to fish.

Composition / Information on Ingredients

Main Substance: Benzyl Benzoate 99%+
Impurities: Trace levels of benzoic acid, benzyl alcohol
Exposure to other significant substances is uncommon, so all precautions focus on the main ingredient.

First Aid Measures

Eye Contact: Rinse gently with clean water for 10-15 minutes, lifting eyelids. Even a mild exposure leaves a distinct sting, so eye washing is critical.
Skin Contact: Wash affected area with soap and water. Remove contaminated clothing. Workers should always avoid working bare-skinned after a spill due to persistent itching or tingling.
Inhalation: Move outside or to fresh air. Symptoms such as dizziness or coughing usually ease once clear of vapors.
Ingestion: Rinse mouth with water. Medical attention is recommended in all cases of ingestion as symptoms like abdominal pain can linger. Older advice included giving milk, but professionals view this with caution now.
Advice to Physicians: No specific antidote, treatment is symptomatic. Hydration and monitoring recommended.

Fire-Fighting Measures

Flammability: Not easily ignited, but can catch fire at high temperatures
Suitable Extinguishing Media: Dry powder, carbon dioxide, foam
Thermal Decomposition: Generates fumes of carbon monoxide and carbon dioxide
Protective Actions: Firefighters wear self-contained breathing apparatus and protective gear. Many remember benzyl benzoate’s oily nature makes it a persistent residue after extinguishing, so clean-up often becomes the tougher job.
Explosion Risk: Vapors may form explosive mixtures above 150°C, but common storage temperatures won’t trigger this. That’s practical safety for warehouses and labs.

Accidental Release Measures

Personal Protection: Wear gloves, goggles, and a face mask when cleaning. The material leaves slick patches so it pays to watch your step.
Spill Response: Absorb with sand, vermiculite, or earth. Sweep and shovel into sealed containers for proper disposal.
Ventilation: Open windows or run extraction fans to clear vapors.
Environmental Precautions: Prevent material from entering drains or bodies of water. Small spills get handled fast; bigger ones may require environmental response teams, especially near sensitive sites like water treatment facilities.
Waste: Used absorbents must be treated as hazardous waste. Simple disposal down the drain is not an option.

Handling and Storage

Storage Conditions: Store in tightly sealed containers in a cool, dry, well-ventilated place. Stainless steel or glass works better than reactive metals. Avoid storing next to strong acids, oxidizing agents, or heat sources.
Handling Tips: Use gloves and protective aprons. Working with it daily, folks appreciate good ventilation and the right gloves; rubber or nitrile work best. Do not eat, drink, or smoke during handling.
Transfer Procedures: Use chemical transfer pumps or funnels to avoid spills. Experience suggests cleaning up splashes swiftly prevents long-term residues.
Incompatible Materials: Strong acids, bases, and oxidizing agents set off unwanted reactions, so keep them apart.

Exposure Controls and Personal Protection

Engineering Controls: Fume hoods, extraction fans, and closed systems reduce inhalation risk. I remember workshops where only manual transfer was done—high vapor spaces made the eyes sting if fans weren’t on.
Personal Protective Equipment (PPE): Chemical-resistant gloves, splash goggles, lab coats
Respiratory Protection: Respiratory masks needed in cases of vapors or spills, especially when cleaning out storage tanks.
Occupational Exposure Limits: Not established in most regulatory zones, so companies set their own in-house air monitoring.
Hygiene: Clean hands before eating or drinking, wash up before leaving the work area.

Physical and Chemical Properties

Appearance: Oily, colorless to pale yellow liquid
Odor: Lightly balsamic
Boiling Point: 323°C
Melting Point: 18°C
Flash Point: 148°C (Closed Cup)
Auto-Ignition Temperature: Above 500°C
Solubility: Water—poor; alcohol, ether—good
Vapor Pressure: Low at ambient temperature
Density: 1.118 g/cm³
Many lab techs have noted the weight and slipperiness that stick around longer than with water or alcohols.

Stability and Reactivity

Chemical Stability: Stable under standard conditions
Hazardous Reactions: Contact with strong acids, bases, and oxidizers may trigger a reaction, usually generating heat or fumes.
Incompatible Materials: Strong oxidizers, strong acids, alkalis
Decomposition: Produces irritating fumes, mainly benzaldehyde, benzoic acid, carbon oxides under strong heat
Polymerization: Does not occur under normal use.

Toxicological Information

Acute Toxicity: Oral ingestion in large amounts can cause nausea, vomiting, abdominal pain, and central nervous system effects. Skin contact irritates and, with time, can bring on dermatitis. Handling pure liquid for more than short periods without gloves shows up as peeling or dry skin in most users.
Chronic Effects: Long-term exposure rarely linked to lasting damage, but people with sensitive skin or allergies might develop ongoing irritation.
Carcinogenicity: No evidence found linking benzyl benzoate to cancer, based on IARC and available studies.
Sensitization: Can provoke allergic responses in people with perfume or preservative allergies.
Aspiration Hazard: Not a likely concern due to high viscosity, so risk is minimal compared to more volatile compounds.

Ecological Information

Toxicity: Highly toxic to aquatic organisms; even at low concentrations, fish and invertebrates suffer damage.
Persistence and Degradability: Breaks down slowly in natural waters and sediments.
Bioaccumulation: Moderate risk—fat-soluble, so it builds up in fish tissue if released repeatedly.
Mobility: Low in soil but can leach if mixed with organic solvents.
Environmental Considerations: Releases should be avoided near waterways. Old stories of accidental drainage causing fish kills made this rule familiar even before it became law.

Disposal Considerations

Waste Disposal: Collect waste and contaminated absorbents for delivery to licensed hazardous waste incinerators or treatment facilities.
Never pour down household drains or toss in regular trash. Clean containers thoroughly if reusing; residual smell clings, making it unsuitable for food or water storage.
Regulations: Comply with local, regional, and national regulations for hazardous chemical waste. Regulatory visits often focus on proper documentation—keeping a disposal ticket on hand eases audits.
Environmental Responsibility: Even outside the law, workers with any experience recognize the damage caused by dumping—it's good practice to track and control all waste.

Transport Information

UN Number: 1993 (flammable liquid, not otherwise specified, for high-quantity transport)
Proper Shipping Name: Benzyl Benzoate
Hazard Class: 3 (for bulk shipments)
Packaging Group: III
Transportation Precautions: Keep containers upright, cushioned to avoid leaks. Shipping in glass or HDPE drums helps. Drivers and handlers need spill kits ready during transit, with spill kits and emergency contacts noted on the exterior manifest.

Regulatory Information

Regulatory Status: Regulated as a hazardous chemical in regions such as the EU, US, and Asia
Labeling: Requires hazard pictograms, signal word, and risk/precaution phrases where regulated
REACH (EU): Listed with restrictions on cosmetic and pharmaceutical concentrations
OSHA (US): Not specifically listed, though general chemical safety requirements apply
Workplace Safety: Safety Data Sheets must be made available to all employees; regular risk training sessions recommended, especially where bulk handling occurs.
Consumer Products: Restricted in many leave-on personal care items, monitored in food contact applications.