© 2026 Nanjing Finechem Holdings Co., Ltd,
All Right Reserved
Chemical Name: Methyl Palmitoleate
Synonyms: Methyl (Z)-9-hexadecenoate
CAS Number: 301-38-6
Recommended Uses: It finds its way into cosmetic formulations and sometimes research labs where natural oil components are necessary. Most folks don’t interact with it directly, but knowing what it is, and what risks or benefits it brings, matters for anyone handling chemicals, even when the compound sounds mild.
Classification: This compound does not show the alarming warning signs that come with aggressive acids or solvents. It doesn’t carry significant acute health risks, such as corrosivity or serious toxicity, but that never means a person can relax completely. There’s always a chance for skin or eye irritation on contact. Accidental inhalation of vapors, though rare since Methyl Palmitoleate isn’t volatile, could irritate airways if exposure runs unchecked. Environmental risks stay low, but keeping product off skin and out of lungs should always stay a top priority.
Ingredient: Methyl Palmitoleate
Purity: Typically found at over 98% in lab supplies, with potential for very minor impurities. The compound itself is a fatty acid methyl ester. For those working with pure samples, the risk profile doesn’t change much, but small contaminants in technical grade materials bring their own concerns. Always check for minor derivatives that piggyback on the main ingredient, especially in bulk batches handled for manufacturing.
Eye Contact: Flush eyes under running water, making sure to keep lids open. Don’t rub. Even mild oils burn if rubbed in, and sometimes an eyewash station is the simplest equipment that keeps a bad day from turning worse.
Skin Contact: Rinse skin with plenty of soap and water. Change out of splashed clothes.
Inhalation: Move to fresh air if breathing feels uncomfortable. This compound doesn’t produce the choking fumes you get from some solvents, but small oil droplets in mist form shouldn’t be ignored.
Ingestion: Rinse mouth if swallowed. Watch for any symptoms, go to a clinic if things feel wrong. Swallowing moderate amounts isn’t common, but curiosity and open containers can lead to these accidents.
Flammability: Like most fatty acid esters, Methyl Palmitoleate can catch fire, especially when heated. It doesn’t explode, but a grease fire can start quickly once temperatures pass its flash point, which is usually around 200°C. Water may spread burning oil, so reach for foam, carbon dioxide, or dry chemical extinguishers. Better ventilation helps, since fumes from burning esters can cause irritation or mild headaches. Firefighters should wear full protective gear to avoid skin contact and take deep breaths only through proper respiratory protection when fumes build.
Containment: Stop the spill from spreading using absorbent material like sand or a spill pad. A small amount of oil on a lab bench isn’t much trouble, but larger volumes on a floor can turn work areas into slip hazards quickly. Wipe up all residues promptly, dispose of clean-up materials as oily waste.
Ventilation: Always vent the area if fumes are noticeable, even though vapors pose less risk than with volatile chemicals.
Environmental Consideration: Prevent the compound from getting into drains, waterways, or soil; oils can coat surfaces and harm aquatic life in bulk, even if toxicity scores run low.
Handling: Keep lids on containers at all times. Wear gloves and avoid open flames or hot surfaces in the workspace. Don’t eat or drink near the compound. Washing hands before breaks or after handling chemicals keeps residues off food and faces.
Storage: Store in tightly closed containers in a cool, dry place, away from sources of heat or direct sunlight. The compound remains stable in proper storage, but temperature swings make bottles expand and contract, sometimes causing leaks. Chemical storage cabinets do a good job of protecting against accidental spills.
Engineering Controls: Work under a fume hood if you’re heating the compound. Regular room ventilation usually handles most laboratory use.
Personal Protective Equipment: Gloves made of nitrile or PVC, safety goggles, lab coats keep spills off skin. If large volumes are poured, use a face shield. Respiratory protection isn’t usually needed unless dust or aerosols form, but preparedness comes standard in every well-run lab.
Appearance: Clear to pale yellow oily liquid.
Odor: Mild, fatty odor, not unpleasant but noticeable.
Melting Point: About -1°C
Boiling Point: Notably high, often above 300°C
Flash Point: Around 200°C
Solubility: Insoluble in water, soluble in organic solvents like ethanol and ether.
Density: Slightly less than water, which means spills float on surfaces and spread unless contained. These physical properties shape the way spills and fires must be handled, and why proper engineering controls matter even for ‘safe’ oils.
Stability: The molecule doesn’t break down under room temperature or standard conditions.
Reactivity: Avoid mixing with strong oxidizers; that’s where reactions usually turn nasty, since esters can break down or combust violently with enough provocation. Stable for years when kept away from sunlight and stored tightly sealed. Don’t heat above flash point unless specialized equipment can control temperature precisely.
Acute Toxicity: Generally considered low in acute toxicity, but long-term testing hasn’t been comprehensive. Direct exposure to skin or inhalation of mist can cause mild irritation. Ingestion in moderate quantities might result in upset stomach, but serious cases are rare.
Chronic Effects: No evidence of carcinogenic, mutagenic, or reproductive toxicity for Methyl Palmitoleate itself so far, but this shouldn’t breed complacency. Chemists and workers exposed daily to even ‘benign’ oils should keep occupational hygiene practices sharp.
Persistence and Degradability: The compound breaks down in the environment over time, but like other fatty substances, it can coat surfaces and harm aquatic animals when released in bulk.
Bioaccumulation: Low risk since larger organisms metabolize esters for energy, though small aquatic life still faces threat from surface films. Spills aren’t a calamity, but they still deserve prompt cleanup and proper waste segregation.
Toxicity to Fish/Invertebrates: Typically minor in small quantities, but significant spills disrupt water surfaces and interfere with oxygen transfer.
Waste Management: Never pour the residue down a drain or toss oily rags into regular trash cans. Collect oily waste in dedicated bins, and hand it over to chemical waste handlers who know how to process or incinerate such materials safely. Dilution isn’t a solution for chemicals, and oily residues should follow established hazardous waste rules, even if the compound’s toxicity is considered low.
UN Classification: Not classified as a hazardous material for ground, sea, or air shipments in most jurisdictions. Still, seal all containers tightly and pack to prevent leaks, as even a minor oil spill makes a mess and draws regulatory attention during transit.
Labelling: Proper chemical names and hazard information on every container help avoid confusion and keep handlers aware of contents. Regulations tend to follow the SDS information and expect handlers to label materials even if official transport risks remain low.
Global Inventories: Listed on most chemical regulatory lists, including the US TSCA and Europe’s REACH. No strict restrictions for use or transportation, but workplace laws about chemical exposure, handling PPE, and emergency procedures remain relevant.
Worker Safety: OSHA, EU-OSH, and national guidelines for safe chemical handling apply universally, and even low-risk oils need basic labeling, safety training, and clear emergency plans.
