4-Methylcinnamic Acid CAS 1866-39-3

1. Acts 4-Methylcinnamic acid CAS 1866-39-3 as a key intermediate for synthesizing pharmaceuticals, especially antifungal adjuvants that enhance the efficacy of cell wall - disrupting agents to overcome drug resistance.

2. Serves 4-Methylcinnamic acid as a building block in organic synthesis for preparing specialty esters, fragrances and fine chemicals via condensation or substitution reactions.

3. Functions as a UV absorber intermediate in cosmetics and polymers, helping develop products with enhanced light stability for skincare and plastic materials.

Store 4-methylcinnamic acid (CAS 1866-39-3, trans-dominant) in sealed amber glass containers at 15–25°C in a cool, dry, dark and well-ventilated area (melting point 196–198°C, non-flammable solid). Isolate from strong oxidants, strong bases and reducing agents to prevent degradation and maintain chemical stability. Wear nitrile gloves, safety goggles and lab coats during handling; avoid inhalation, skin/eye contact and ingestion as it causes mild irritation. Reseal tightly after use; dispose of waste per local hazardous chemical and environmental regulations.

4-Methylcinnamic acid is an industrial and pharmaceutical intermediate, not for direct human ingestion in pure form; unregulated intake may cause digestive discomfort and mild mucosal irritation.

In regulated applications, 4-Methylcinnamic acid CAS 1866-39-3 aids in developing anti - fungal adjuvants to boost drug potency, supports production of high - value fine chemicals, and enables synthesis of UV - protective ingredients for daily chemical and polymer products.