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Sorbitan Monostearate, also known as E491, is a nonionic surfactant and emulsifier derived from the esterification of sorbitol with stearic acid.
Sorbitan Monostearate (E491) is widely used in food, cosmetics, and pharmaceutical industries for its emulsifying and stabilizing properties, enhancing texture and product stability.
Sorbitan Monostearate (E491) is particularly valued in formulations where it helps create smooth, stable water-in-oil emulsions.
CAS Number: 1338-41-6
EC Number: 215-664-9
Molecular Formula: C24H46O6
Molecular Weight: 430.62 g/mol
Synonyms: Sorbitan Monostearate, Span 60, Sorbitan Stearate, Sorbitol Monostearate, E491, Sorbitan Ester, Nonionic Emulsifier E491
APPLICATIONS
Sorbitan Monostearate (E491) is commonly used in the food industry as an emulsifier in products like baked goods, chocolate, and margarine, where it enhances texture and prevents separation.
Sorbitan Monostearate (E491) is included in processed foods like ice cream, where it stabilizes the emulsion and prevents crystallization, maintaining a smooth texture.
Sorbitan Monostearate (E491) is essential in powdered drink mixes, where it acts as an anti-caking agent, ensuring that powders remain free-flowing and dissolve easily in water.
Sorbitan Monostearate (E491) is widely used in lotions, creams, and sunscreens in the cosmetics industry, where it stabilizes emulsions and enhances the smooth feel of products.
Sorbitan Monostearate (E491) is incorporated into foundations and tinted moisturizers, where it prevents ingredient separation, ensuring a consistent application and color distribution.
Sorbitan Monostearate (E491) is applied in hair conditioners and masks, where it acts as a thickener and stabilizer, enhancing product consistency and improving spreadability.
Sorbitan Monostearate (E491) is included in pharmaceutical creams and ointments, where it ensures even dispersion of active ingredients and enhances stability.
Sorbitan Monostearate (E491) is used in drug formulations as a stabilizing agent, aiding in the delivery and release of active compounds.
Sorbitan Monostearate (E491) is found in eye creams and personal care products, providing a creamy, smooth texture while keeping the formulation stable.
Sorbitan Monostearate (E491) is utilized in animal feed as an emulsifier and stabilizer, helping to enhance the texture and reduce dusting in feeds.
Sorbitan Monostearate (E491) is found in lubricants and greases, where it provides thickening and stabilization, helping to maintain product consistency over time.
Sorbitan Monostearate (E491) is applied in paints and coatings as a dispersing agent, helping to ensure uniform distribution of pigments and additives for consistent color and texture.
Sorbitan Monostearate (E491) is a useful additive in agricultural formulations, acting as a wetting agent and emulsifier, which enhances the effectiveness and spreadability of pesticides and fertilizers.
Sorbitan Monostearate (E491) is employed in candle manufacturing, where it improves the binding of wax and oils, ensuring a uniform and consistent burn.
Sorbitan Monostearate (E491) is used in rubber and plastic processing, where it aids in the even distribution of fillers, enhancing material quality and durability.
Sorbitan Monostearate (E491) is found in fabric softeners, where it improves softness and conditioning effects, leaving fabrics feeling smoother and more comfortable.
Sorbitan Monostearate (E491) is used in leather and wood protective sprays, providing conditioning properties that prevent drying and cracking.
Sorbitan Monostearate (E491) is included in printing inks and toners, where it enhances flow properties and prevents clogging in printing devices.
DESCRIPTION
Sorbitan Monostearate (E491) is a nonionic surfactant known for its mild emulsifying and stabilizing properties, which are essential in various food, personal care, and industrial applications.
Sorbitan Monostearate (E491) is ideal for forming water-in-oil emulsions, stabilizing products across a wide range of temperatures and enhancing product texture and feel.
The mild nature of Sorbitan Monostearate (E491) makes it suitable for skin-contact applications, such as cosmetics and skincare products, where it provides a soft, creamy consistency.
Sorbitan Monostearate (E491) is biodegradable and safe, earning its Generally Recognized as Safe (GRAS) status for use in food products.
The compound’s compatibility with other ingredients makes Sorbitan Monostearate (E491) a versatile option in multi-phase formulations, such as lotions and creams.
Sorbitan Monostearate (E491) is known for its thermal stability, ensuring consistent performance in both high and low-temperature applications.
PROPERTIES
Chemical Formula: C24H46O6
Molecular Weight: 430.62 g/mol
Common Name: Sorbitan Monostearate (E491)
Appearance: White to pale yellow waxy solid or powder
Density: Approx. 1.0 g/cm³
Boiling Point: N/A
Melting Point: 55-58°C
Solubility: Insoluble in water; soluble in oils and organic solvents
Flash Point: >150°C
Reactivity: Stable under normal conditions; avoid strong oxidizing agents
Chemical Stability: Stable under recommended storage conditions
Storage Temperature: Store in a cool, dry place away from direct sunlight and moisture
Vapor Pressure: Low
FIRST AID
Inhalation:
If Sorbitan Monostearate (E491) dust is inhaled, move the affected person to fresh air immediately.
If breathing difficulties persist, seek immediate medical attention.
If the person is not breathing, administer artificial respiration.
Keep the affected person warm and at rest.
Skin Contact:
Wash the affected area with soap and water.
If skin irritation or rash develops, seek medical attention.
Eye Contact:
In case of eye contact, flush the eyes with plenty of water for at least 15 minutes, lifting upper and lower eyelids.
Seek immediate medical attention if irritation or redness persists.
Remove contact lenses if present and easy to do; continue rinsing.
Ingestion:
If Sorbitan Monostearate (E491) is ingested, do not induce vomiting unless directed to do so by medical personnel.
Rinse the mouth thoroughly with water.
Seek immediate medical attention.
If the person is conscious, give small sips of water to drink.
Note to Physicians:
Treat symptomatically.
No specific antidote.
Provide supportive care.
HANDLING AND STORAGE
Handling:
Personal Protection:
Wear appropriate personal protective equipment (PPE) such as gloves, safety goggles, and dust masks when handling large quantities of Sorbitan Monostearate (E491).
Use in a well-ventilated area to avoid inhalation of dust.
Ventilation:
Ensure adequate ventilation when handling large amounts of Sorbitan Monostearate (E491) to control airborne concentrations below occupational exposure limits.
Avoidance:
Avoid generating dust and direct contact with eyes.
Do not eat, drink, or smoke while handling Sorbitan Monostearate (E491).
Wash hands thoroughly after handling.
Spill and Leak Procedures:
Contain spills to prevent further release and minimize exposure.
Sweep up spills carefully to avoid dust generation and dispose of according to local regulations.
Storage:
Store Sorbitan Monostearate (E491) in a cool, dry, well-ventilated area away from incompatible materials such as strong oxidizers.
Keep containers tightly closed when not in use to prevent contamination and moisture absorption.
Store away from heat sources, direct sunlight, and excessive humidity.
Handling Cautions:
Avoid inhalation of dust and direct contact with eyes and skin.
Use explosion-proof equipment in areas where dust particles may be present.
