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DESCRIPTION
E260 is the code for acetic acid when used as a food additive.
E260 ACETIC ACID is a weak organic acid that is commonly found in vinegar, where it gives vinegar its characteristic sour taste and pungent smell.
In the context of food, E260 serves as a preservative, acidulant, and flavor enhancer.
It's used to adjust the pH of products, preserve them by inhibiting microbial growth, and add a tangy flavor to items such as sauces, pickles, and dressings.
Cas Number: 64-19-7
SYNONYMS
Ethanoic acid,Vinegar acid,Acetic acid , Acetic acid solution ,Methanecarboxylic acid
Overview of Acetic Acid
Acetic acid, also known as ethanoic acid, is a colorless liquid organic compound with a strong acidic taste and smell.
E260 ACETIC ACID is a key component of vinegar, where it typically constitutes 4-8% of the liquid.
In its pure form, acetic acid is a powerful acid with the chemical formula CH₃COOH. Its carboxyl group (-COOH) is responsible for its acidity. Acetic acid is widely used in food, industrial processes, and biological systems.
Historical Background
Acetic acid has a long history, dating back to ancient civilizations, where vinegar (containing acetic acid) was used for preservation and flavoring.
In the 17th century, the compound was isolated and characterized. Industrial production began in the 19th century, initially using fermentation and later synthetic methods, paving the way for large-scale production.
Acidity and pH
Acetic acid is a weak acid, meaning it only partially dissociates in water.
The acid dissociation constant (pKa) of acetic acid is 4.76, indicating that it is moderately strong among weak acids.
Its pH in a 1M solution is around 2.4, showing its acidic nature.
Solubility and Miscibility
Acetic acid is highly soluble in water, alcohol, and ether due to its ability to form hydrogen bonds with water molecules.
The solubility increases with temperature. Its miscibility in ethanol and other organic solvents makes it a versatile solvent in chemical reactions.
Production and Synthesis
Natural and Synthetic Sources
Acetic acid occurs naturally in small quantities in many foods, as it is produced during fermentation.
Vinegar is a popular source, where ethanol is fermented by acetic acid bacteria. Industrial production, however, is primarily synthetic.
Methods of Commercial Production
Fermentation: The biological process of fermenting ethanol (from grains or fruit) by acetic acid bacteria produces acetic acid.
This method is slow and typically used in small-scale vinegar production.
Synthesis from Methanol: The most common industrial method is the carbonylation of methanol, where methanol reacts with carbon monoxide in the presence of a catalyst to form acetic acid.
Acetaldehyde Oxidation: Another method involves oxidizing acetaldehyde (produced from ethanol or other sources) with oxygen in the presence of a catalyst.
Global Production Statistics
The global production of acetic acid is substantial, with millions of tons produced annually.
Leading producers include China, the United States, and several European countries.
The major uses in the chemical industry, especially in the production of plastics (such as PET), acetate fibers, and solvents, drive this high demand.
Acetic Acid in Food Industry (E260)
Regulatory Aspects and Classification
E260 is the code used for acetic acid as a food additive, classified as a preservative, acidulant, and flavoring agent.
The food-grade version of acetic acid is diluted with water to form vinegar, which is used to impart acidity and flavor to various foods.
Preservative Properties
Acetic acid, particularly in vinegar, acts as a preservative by lowering the pH of foods, creating an inhospitable environment for many spoilage bacteria and pathogens.
Its antimicrobial action has been well-documented, making it effective in preserving vegetables, meats, and sauces.
Flavoring and Acidulant Functions
Acetic acid is used for flavoring in foods like salad dressings, pickles, sauces, and condiments.
As an acidulant, it imparts a tangy, sour taste and can modify the texture and color of certain foods.
Acetic Acid in Industrial Applications
Use in Chemicals and Manufacturing
Acetic acid is a key starting material for the production of several chemicals:
Acetate esters (e.g., ethyl acetate, used in paints and solvents)
Acetic anhydride (used in the production of pharmaceuticals, plastics, and explosives)
Acetate fibers (used in textiles like rayon)
Acetic acid is also involved in the production of plastics such as PET (Polyethylene Terephthalate) used in bottles and textiles.
Environmental Impact
Acetic acid is biodegradable, but its production and industrial processes can release carbon emissions and other pollutants.
Efforts are being made to reduce the carbon footprint of acetic acid production, including using renewable feedstocks like biomass.
Biological and Pharmacological Effects
Metabolic Pathways and Absorption
Acetic acid is rapidly absorbed in the gastrointestinal tract and enters the bloodstream, where it can be metabolized into acetic acid derivatives.
It is an important intermediate in various metabolic pathways, including the Citric Acid Cycle (Krebs cycle), which is vital for energy production in cells.
Effects on Human Health
Acetic acid has been shown to regulate blood sugar levels, and it may have beneficial effects on metabolism, weight loss, and blood lipid levels.
There is also evidence suggesting its potential in managing insulin resistance and obesity.
Acetic Acid in Medicine
Acetic acid has been historically used for wound cleaning, antiseptic applications, and treating fungal infections.
It has also been studied for its anticancer properties, where it has shown potential in inhibiting the growth of certain cancer cells in vitro.
Applications in Agriculture
Pesticidal and Herbicidal Uses
Acetic acid is a natural herbicide used to control weeds in agriculture.
E260 ACETIC ACID disrupts cell membrane integrity in plants, leading to rapid desiccation and death.
E260 ACETIC ACID is particularly effective against young, non-woody plants.
Effect on Soil and Crops
Acetic acid can alter soil pH, which may be beneficial for certain crops but harmful to others.
Its use in agriculture needs to be carefully managed to avoid detrimental effects on soil health.
Environmental Impact and Sustainability
Biodegradability
Acetic acid is easily biodegradable and does not accumulate in the environment.
It is broken down by microbial activity in both aerobic and anaerobic conditions, contributing to minimal long-term environmental impact.
Sustainability in Production
Recent developments focus on making acetic acid production more sustainable by using renewable biomass sources.
Research into more efficient fermentation methods and the use of CO₂ as a feedstock for synthetic production is ongoing.
Health and Safety Considerations
Exposure Limits and Occupational Safety
Workers exposed to acetic acid in industrial settings must adhere to strict occupational health guidelines.
Concentrated acetic acid vapors can cause respiratory irritation, and liquid spills can lead to skin burns.
Adequate ventilation, personal protective equipment, and safety training are essential.
First Aid and Emergency Procedures
In case of exposure, rinse affected areas with water immediately. For eye contact, seek medical attention as acetic acid can cause severe eye irritation.
Emergency protocols should be in place in facilities handling concentrated acetic acid.
Research and Innovations
Recent Advances in Acetic Acid Research
Recent studies have focused on acetic acid’s potential in biotechnological applications, including the development of bio-based plastics and its use in drug delivery systems.
The fermentation processes have also been optimized to improve efficiency and yield.
Emerging Trends and Future Prospects
Acetic acid’s role in green chemistry and as a sustainable feedstock for various industries is a promising area of research.
Future trends may focus on reducing the environmental impact of production and enhancing its uses in medical and agricultural fields.
Acetic acid, or E260, is a versatile compound with wide-ranging applications across food, industry, medicine, and agriculture.
Its benefits as a preservative, acidulant, and solvent are well-established, while its potential in health and environmental sustainability continues to be explored.
Future innovations in its production and applications are expected to make it an even more important compound in modern science and industry.
SAFETY INFORMATION ABOUT E260 ACETIC ACID
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 contaminated 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
