Acetic acid liquid (CAS 64-19-7) is produced and supplied in multiple purity grades, making it suitable for a wide range of industrial, laboratory, and food-related applications.
Common purity grades of acetic acid liquid (CAS: 64-19-7)
Acetic acid purity is usually expressed as a percentage by weight (wt%). The most common commercial purities range from diluted solutions (30–80%) to high-purity glacial acetic acid (≥99%).
| Purity / Grade | Typical Specification | Main Applications |
|---|---|---|
| 99.5–99.9% | Glacial acetic acid (GAA), water ≤0.5% | Chemical synthesis, pharmaceuticals, coatings, adhesives, rubber processing |
| 99.0% | Industrial / laboratory grade | General industrial use, solvents, intermediates |
| 80–75% | Concentrated aqueous acetic acid | Rubber latex coagulation, textile dyeing, pH adjustment, water treatment |
| 60–50% | Diluted acetic acid solution | Industrial cleaning, descaling, process pH control |
| Food grade (≥99% or diluted) | Meets food additive standards (E260) | Food processing, vinegar production, preservation |
| Laboratory grade | High purity with controlled impurities | Analytical testing, R&D laboratories |
Properties of Acetic Acid (GAA CAS 64-19-7)
Physical Properties
- State and Appearance: Acetic Acid (CH₃COOH) exists as a colorless, transparent liquid at standard temperature and pressure, emitting a strong pungent odor (i.e., vinegar smell) and exhibiting high volatility.
- Solubility: Infinitely miscible with polar solvents such as water, ethanol, and diethyl ether. This property enables its widespread use in solution-based applications.
- Boiling Point and Melting Point: Boils at approximately 117.9°C (247.8°F) and melts at approximately 16.6°C (32.3°F). At low winter temperatures, pure acetic acid crystallizes into an ice-like solid, hence its alternative name "glacial acetic acid."
- Corrosivity: Exhibits weak acidity. At higher concentrations (e.g., glacial acetic acid), it can cause corrosion to skin, eyes, and mucous membranes. Promptly rinse with water upon contact.
Chemical Properties
- Acidity: Classified as a weak acid, it partially ionizes in water to release H⁺ (ionization equation: CH₃COOH ⇌ CH₃COO⁻ + H⁺). It reacts with bases (e.g., NaOH) and carbonates (e.g., Na₂CO₃) to form salts and water. For instance, reacting with baking soda produces carbon dioxide gas (commonly used for descaling).
- Esterification Reaction: Under conditions of heating and catalysis by concentrated sulfuric acid, it reacts with alcohols (e.g., ethanol) to form esters (e.g., ethyl acetate) and water. This reaction is a fundamental principle in the production of fragrances and solvents.
- Stability: Acetic Acid (GAA) is stable at room temperature and does not readily decompose. However, under high temperatures or in the presence of strong oxidizing agents, it can be oxidized to carbon dioxide and water.
For detailed information on the chemical Acetic Acid (GAA CAS 64-19-7), please refer to：https://www.gneechemical.com/petrochemicals/high-purity-99-8-acetic-acid-cas-64-19-7.html
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