As a pharmaceutical raw material, Sodium Benzoate owes its core value to its antibacterial and preservative properties as well as its function as a pharmaceutical excipient. It can also serve as a synthetic intermediate for certain drugs. Below are its specific application scenarios and key industry points, tailored for communication in the foreign trade of pharmaceutical raw materials:

I. Core Application Scenarios

1. Preservative for Pharmaceutical Preparations

This is the primary application of Sodium Benzoate in the pharmaceutical field. It is widely used in liquid preparations (e.g., oral solutions, syrups, topical lotions, and excipients for injections). By inhibiting the growth and reproduction of microorganisms (bacteria, yeasts, and molds), it extends the shelf life of drugs and ensures the stability and safety of preparations within their validity period.

Applicable Preparation TypesOral suspensions, cough syrups, skin disinfectant lotions, ophthalmic irrigation solutions, etc.

Advantages

• Broad antibacterial spectrum, effective against a variety of pathogenic bacteria
• Excellent water solubility, easy to integrate with preparation formulations
• High safety profile, compliant with pharmaceutical standards within the specified dosage range

2. Pharmaceutical Synthetic Intermediate

Sodium Benzoate can act as a raw material to participate in the synthesis of certain drugs, including:

• Intermediate Synthesis: Serving as an intermediate for the production of antifungal drugs and antibiotics
• Auxiliary Raw Material: Acting as an auxiliary material for some antipyretic and analgesic drugs to optimize their stability or solubility

3. Pharmaceutical Excipient (pH Regulator)

In some pharmaceutical formulations, Sodium Benzoate can function as a mild pH regulator. It adjusts the acidity and alkalinity of preparations, helps maintain the activity of active pharmaceutical ingredients, and enhances the compatibility and human tolerance of the formulations.

II. Core Technical Requirements for Pharmaceutical-grade Sodium Benzoate

Major Pharmacopoeia Standards:

• Chinese Pharmacopoeia (ChP)
• United States Pharmacopeia (USP)
• European Pharmacopoeia (EP)

In foreign trade business, the following indicators that comply with international pharmacopoeia standards (e.g., USP, EP, BP) should be emphasized to customers:

1. Purity≥99.0%, with strict control over impurity content.
2. Stringent Impurity Limits: Extremely rigorous restrictions are imposed on heavy metals, arsenic, related substances (e.g., benzaldehyde, benzoic acid), chlorides, sulfates, and loss on drying.
3. Acidity and AlkalinityThe pH value should range between 7.0 and 8.0 to ensure pharmaceutical safety.