Benzoic Acid CAS 65-85-0

Physical & Chemical Properties

Benzoic Acid typically appears as white, silk-like scales or needles. While it is solid at room temperature, its behavior under heat and in solvents defines its utility.

Key Applications

Benzoic Acid is rarely the end product; it is the catalyst for performance in other sectors.

1. Plasticizers and Resins (Industrial Grade)

This is the largest consumption sector. Benzoic Acid is a primary raw material for benzoate plasticizers, which are increasingly popular as eco-friendly alternatives to phthalates in PVC and other polymers. It is also used in Alkyd Resins to improve the gloss, adhesion, and hardness of paints and coatings.

2. Food & Beverage Preservation (Food Grade)

Known as preservative E210, Benzoic Acid and its salts (Sodium Benzoate) inhibit bacteria, yeast, and mold. It is highly effective in acidic environments, making it the standard for soft drinks, fruit juices, pickles, and barbecue sauces.

3. Pharmaceutical Intermediates

It serves as a precursor for various drugs and is used directly in antifungal ointments (such as Whitfield’s Ointment) to treat fungal skin diseases.

4. Chemical Synthesis

It is the starting material for Benzoyl Chloride, a critical intermediate used in the production of peroxides (for polymerization initiation) and dyes.

Safety and Prevention Measures

While Benzoic Acid is widely used, it is categorized as an irritant. Proper handling protocols are non-negotiable to ensure worker safety.

• Dust Hazards: The fine powder form can generate dust clouds. In high concentrations, organic dust can be combustible. Facilities must use grounded equipment and explosion-proof ventilation.
• Inhalation: Inhaling the dust causes irritation to the nose and throat. Staff should always use NIOSH-approved dust masks (N95 or equivalent).
• Skin & Eye Contact: It can cause mild to moderate irritation. Safety goggles and protective gloves are standard requirements.
• First Aid: In case of contact with eyes, rinse immediately with plenty of water for at least 15 minutes.

Storage and Handling Conditions

One of the most common issues buyers face with Benzoic Acid is “caking”—where the powder clumps together into hard blocks. This usually happens due to poor storage.

To maintain the free-flowing nature of the material:

1. Humidity Control: Store in a dry area. Relative humidity should be kept low.
2. Temperature: Keep in a cool, well-ventilated place, away from direct sunlight and heat sources. The melting point is relatively low; excess heat can encourage caking.
3. Separation: Store away from strong oxidizers (like fluorine or oxygen) and strong bases.
4. Packaging Integrity: Most exports from China come in 25kg woven bags with PE liners. Ensure the inner liner is sealed tight after partial use to prevent moisture absorption.