In the chemical industry, acetic acid (AA) and glacial acetic acid (GAA) are closely related substances, but they are not entirely the same. Many buyers, importers, and industrial users often confuse these two terms because they both refer to acetic acid solutions of different purities. The main difference between acetic acid and glacial acetic acid lies in their purity and water content. Acetic acid is a diluted aqueous solution, while glacial acetic acid is an undiluted, highly concentrated solution with a water content of less than 1%.
CAS No. 64-19-7 - Acetic acid glacial vs acetic acid
What Is Acetic Acid?
CAS No: 64-19-7 Acetic acid, also known as ethanoic acid, is an organic compound with the chemical formula CH3COOH. Its abbreviation is AA or AcOH.
It is a colorless liquid with a strong, pungent odor similar to vinegar. Acetic acid solutions are widely used in the production of chemicals, solvents, pharmaceuticals, textiles, dyes, and food additives.
Acetic acid solvent is available in various concentrations, including:
- 5%–8% acetic acid (vinegar grade)
- 30%–80% industrial acetic acid
- High purity acetic acid above 99%
Different concentrations determine its industrial applications and processing requirements.
The structural formula is shown below:
What Is Glacial Acetic Acid (gAA)?
Glacial acetic acid is an acetic acid with extremely low water content, typically less than 1%. In many chemical synthesis processes, it is also known as anhydrous acetic acid. Its freezing point is 16.7°C, at which point it crystallizes.
Acetic acid (glacial) has a pungent odor and a molecular weight of 60.06 g mol⁻¹. It is commonly used as a precursor in various chemical synthesis reactions, such as the synthesis of acetic anhydride and terephthalic acid. Its chemical formula is CH₃COOH.
Main Differences
The table below briefly illustrates the differences between glacial acetic acid and acetic acid.
|
|
Glacial Acetic Acid |
Acetic Acid |
|
Water content |
<1% |
>1% |
|
Purity |
High |
Low |
|
Physical state at room temperature |
Liquid/solid (if temperature is less than 16.7°C) |
Liquid |
|
Corrosiveness |
Highly corrosive |
Lowly corrosive |
Gneebio offers glacial acetic acid in various concentrations for use in all industrial applications.
Different Applications
1. Low-Concentration Acetic Acid
Dilute acetic acid liquid is widely used in daily life and industry:
- Food preservation
- Vinegar production
- Detergent production
- Textile processing
- Rubber manufacturing
- Industrial water treatment
2. Glacial Acetic Acid
Glacial acetic acid (GAA) is a high-purity concentrated acetic acid, mainly used in fine chemical and industrial production:
- Production of vinyl acetate monomer
- Production of acetic anhydride
- Preparation of pharmaceutical intermediates
- Various organic synthesis processes
- Production of industrial solvents
- High-purity industrial chemical reactions
Due to its high concentration and low water content, chemical glacial acetic acid (CAS 64-19-7) is an ideal choice for production scenarios requiring minimal water pollution.
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