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Glyceryl esters, also known as glycerides, are a class of esters formed from glycerol (propane-1,2,3-triol) and fatty acids.
These compounds are significant in biological, pharmaceutical, cosmetic, and industrial applications due to their amphiphilic nature.
CAS Number: Glyceryl monoesters vary; a common example is Glyceryl monostearate: 31566-31-1
Synonyms:
Monoacylglycerol,Glyceryl monoesters,Glyceryl monostearate (for specific compound),Glycerol esters,Fatty acid esters of glycerol,Glycerides
Chemical Structure and Classification
Basic Structure
Glyceryl esters are formed through esterification of one, two, or all three hydroxyl groups of glycerol with fatty acids.
Classification
Monoacylglycerols (MAGs) – One fatty acid attached
Diacylglycerols (DAGs) – Two fatty acids attached
Triacylglycerols (TAGs) – Three fatty acids attached
Chemical Formula
General formula depends on esterification:
MAG: C21H42O4 (e.g., glyceryl monostearate)
DAG and TAGs vary by fatty acid chain length
Physicochemical Properties
Property Description
Appearance White to off-white waxy flakes or solid
Odor Odorless or faint fatty odor
Melting Point ~55–65°C (for glyceryl monostearate)
Solubility Insoluble in water; soluble in ethanol and oils
Density ~0.9 g/cm³
pH (10% dispersion) ~6.0–8.0
HLB Value (MAGs) Typically around 3.8–5.0 (lipophilic emulsifier)
Synthesis and Production Methods
Esterification Process
Glycerol is reacted with fatty acids or triglycerides in the presence of an acid or base catalyst.
Transesterification
Triglycerides (vegetable oils) are transesterified with glycerol to yield mono- and di-glycerides.
Enzymatic Methods
Lipase-catalyzed esterification for high selectivity, used in food/pharma industries.
Industrial Raw Materials
Sources: Palm oil, coconut oil, soybean oil, animal fats
Industrial and Commercial Grades
Food Grade
Complies with FCC and E-number standards (e.g., E471 for mono-/diglycerides)
Pharmaceutical Grade
Used as excipients, stabilizers, and bioavailability enhancers
Cosmetic Grade
Emollients and emulsifiers in lotions and creams
Applications
Food Industry
Emulsifiers in bakery, dairy, margarine, and frozen desserts
E471 recognized as safe food additive
Cosmetics and Personal Care
Skin conditioners, opacifiers, and emulsifiers in creams, lotions, and lipsticks
Pharmaceuticals
Bioavailability enhancers
Carrier in suppositories and capsules
Industrial Uses
Lubricants, plasticizers, antistatic agents in plastics
Biological Role and Metabolism
Glyceryl esters are digested into glycerol and free fatty acids by lipase enzymes.
Serve as energy reservoirs in adipose tissues.
Some (like MAGs) have antimicrobial properties.
Analytical Techniques
Gas Chromatography (GC)
Identification and quantification of glyceride species
High-Performance Liquid Chromatography (HPLC)
Separation of mono-, di-, and triacylglycerols
FTIR and NMR Spectroscopy
Structural elucidation of ester bonds
SAFETY INFORMATION ABOUT GLYCERYL ESTERS
First aid measures:
Description of first aid measures:
General advice:
Consult a physician.
Show this safety data sheet to the doctor in attendance.
Move out of dangerous area:
If inhaled:
If breathed in, move person into fresh air.
If not breathing, give artificial respiration.
Consult a physician.
In case of skin contact:
Take off conSAFETYtaminated clothing and shoes immediately.
Wash off with soap and plenty of water.
Consult a physician.
In case of eye contact:
Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.
Continue rinsing eyes during transport to hospital.
If swallowed:
Do NOT induce vomiting.
Never give anything by mouth to an unconscious person.
Rinse mouth with water.
Consult a physician.
Firefighting measures:
Extinguishing media:
Suitable extinguishing media:
Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
Special hazards arising from the substance or mixture
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas
Advice for firefighters:
Wear self-contained breathing apparatus for firefighting if necessary.
Accidental release measures:
Personal precautions, protective equipment and emergency procedures
Use personal protective equipment.
Avoid breathing vapours, mist or gas.
Evacuate personnel to safe areas.
Environmental precautions:
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Methods and materials for containment and cleaning up:
Soak up with inert absorbent material and dispose of as hazardous waste.
Keep in suitable, closed containers for disposal.
Handling and storage:
Precautions for safe handling:
Avoid inhalation of vapour or mist.
Conditions for safe storage, including any incompatibilities:
Keep container tightly closed in a dry and well-ventilated place.
Containers which are opened must be carefully resealed and kept upright to prevent leakage.
Storage class (TRGS 510): 8A: Combustible, corrosive hazardous materials
Exposure controls/personal protection:
Control parameters:
Components with workplace control parameters
Contains no substances with occupational exposure limit values.
Exposure controls:
Appropriate engineering controls:
Handle in accordance with good industrial hygiene and safety practice.
Wash hands before breaks and at the end of workday.
Personal protective equipment:
Eye/face protection:
Tightly fitting safety goggles.
Faceshield (8-inch minimum).
Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).
Skin protection:
Handle with gloves.
Gloves must be inspected prior to use.
Use proper glove
removal technique (without touching glove's outer surface) to avoid skin contact with this product.
Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices.
Wash and dry hands.
Full contact:
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
Splash contact
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
It should not be construed as offering an approval for any specific use scenario.
Body Protection:
Complete suit protecting against chemicals, The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace.
Respiratory protection:
Where risk assessment shows air-purifying respirators are appropriate use a fullface respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls.
If the respirator is the sole means of protection, use a full-face supplied air respirator.
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU).
Control of environmental exposure
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Stability and reactivity:
Chemical stability:
Stable under recommended storage conditions.
Incompatible materials:
Strong oxidizing agents:
Hazardous decomposition products:
Hazardous decomposition products formed under fire conditions.
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas.
Disposal considerations:
Waste treatment methods:
Product:
Offer surplus and non-recyclable solutions to a licensed disposal company.
Contact a licensed professional waste disposal service to dispose of this material.
Contaminated packaging:
Dispose of as unused product
