Is 99% acetic acid liquid flammable？How to store it safely?

CAS 64-19-7 Acetic acid is a colorless acid with a pungent odor, most commonly known as a major component of vinegar. Low concentrations are generally harmless. High-concentration is widely used in industrial sectors, and many buyers and industrial users ask: Is 99% glacial acetic acid flammable? What are its storage requirements? How to handle it safely? This article will explain the  safe storage methods of high purity glacial acetic acid.

Is 99% Acetic Acid Flammable?

Yes. According to many international chemical safety regulations, 99% acetic acid is classified as a flammable liquid.

Its flash point is approximately 39°C, meaning that acetic acid will produce flammable vapors when exposed to sufficient heat, sparks, or open flames. Although glacial acetic acid is less flammable than many organic solvents, concentrated acetic acid still poses a fire hazard in industrial environments.

Properties of 99% Glacial Acetic Acid

Learn more about acetic acid chemical properties and specifications to match your industry. Click here!

Glacial Acetic Acid Hazard Information

In addition to its flammability, glacial acetic acid also presents the following hazards:

• Corrosive to skin and eyes
• Irritating to the respiratory system
• Reacts readily with strong oxidizing agents
• Releases irritating vapors

High purity glacial acetic acid can cause:

• Chemical burns
• Eye damage
• Respiratory discomfort
• Metal corrosion

Therefore, proper industrial operating procedures must be followed.

How to Store 99% Acetic Acid Safely?

1. Store in a cool, well-ventilated place

Store 99% glacial acetic acid in a cool, dry, well-ventilated warehouse. The ideal storage temperature is 5°C to 30°C.

2. Keep away from heat and fire sources

Keep away from open flames, sparks, high-temperature surfaces, welding areas, and static electricity. If necessary, install explosion-proof electrical equipment in industrial storage areas.

3. Choose suitable storage containers

It is recommended to use stainless steel, high-density polyethylene (HDPE) plastic drums, and corrosion-resistant IBC containers for storage. Never use easily corroded metals or other containers. Common packaging sizes include 30 kg drums, 220 kg drums, 1050 kg IBC containers, and ISO standard IBC containers.

4. Store separately from incompatible chemicals

Do not store acetic acid liquid with strong oxidizers, strong alkalis, active metals, and peroxides.

5. Seal the container

Acetic acid chemical absorbs moisture from the air and releases strong, irritating gases. Always keep the container lid completely closed to prevent leaks, and check the seal regularly.

What Is 99% Acetic acid (Glacial) Liquid Used For?

• Chemical Manufacturing: Used in the production of acetic anhydride, acetate esters, and vinyl acetate monomer (VAM).
• Textile Industry: Functions as a pH regulator and dyeing agent in fabric treatments.
• Food Industry: Approved for use as an acidity regulator (when appropriately diluted).
• Pharmaceuticals: Serves as a raw material for active pharmaceutical ingredient (API) synthesis.
• Cleaning Solutions: Acts as a descaling agent and solvent in household and industrial cleaners.
• Plastic Production: Integral to polymer and resin formulations.

Industrial and Food Grade Acetic Acid Supplier

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