Description
Glacial acetic acid99.8% is the pure, anhydrous (water-free) form of acetic acid (CH₃COOH). It gets the name “glacial” because it solidifies into ice-like crystals just below room temperature (freezing point: ~16.6°C or ~62°F).
Chemical Properties
| Physical Property | Description / Value |
| Chemical Formula | CH₃COOH |
| Molar Mass | 60.05 g/mol |
| Appearance | Colorless liquid |
| Odor | Pungent, vinegar-like |
| Taste | Sour (acidic) |
| Density | 1.049 g/cm³ at 25°C |
| Melting Point | 16.6 °C (can solidify slightly below room temperature) |
| Boiling Point | 118–119 °C |
| Solubility in Water | Completely miscible |
| Solubility in Alcohol / Ether | Miscible |
| Vapor Pressure | 11.4 mmHg at 20 °C |
| Viscosity | 1.22 mPa·s at 20 °C |
| Refractive Index | 1.371 at 20 °C |
| Hygroscopicity | Highly hygroscopic (absorbs water from air) |
Grades
Acetic acid is available in several grades, depending on its intended use and level of purity. Here’s a clear breakdown of the main acetic acid grades:
Glacial Acetic Acid (≥99–100%)Highly pure and concentrated (water-free)Used in: Industrial processes
Food Grade Acetic Acid (typically 99% or diluted to ~4–6%)Approved for use in foods by regulatory bodies (like FDA, FSSAI)Used in:
Vinegar production, Food preservation , Flavoring agent
Pharmaceutical Grade / USP / BP Grade. Very high purity; meets standards of pharmacopeias (USP, BP, IP)Used in:
Medicines , Injectable solutions (in very small amounts) , Disinfectants and Wound cleaning solutions.
Technical Grade / Industrial Grade. May be 90–99% concentration and Not intended for food or pharma use Used in:
Dyes, paints, and coatings , Rubber and plastic production and Cleaning agents.
Vinegar (Dilute Acetic Acid) Usually contains 4–8% acetic acid in water
Common household use, Natural or synthetic origin, Used for cooking, pickling, and cleaning
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