1. Serves 4-Methylsulphonylphenylacetic acid as a key intermediate for etoricoxib and other COX-2 inhibitors, enabling efficient pharmaceutical synthesis with high selectivity for anti-inflammatory drug R&D.

2. Acts 4-Methylsulphonylphenylacetic acid CAS 90536-66-6 as a versatile building block for fine chemicals, stably preparing sulfonyl-containing organic molecules for agrochemical and material science applications.

3. Functions as a high-purity organic acid, reliably fabricating specialty polymers and dyes for advanced industrial and textile manufacturing with enhanced performance.

Store 4-Methylsulphonylphenylacetic acid CAS 90536-66-6 at 5–25℃ in sealed amber glass/HDPE drums in a cool, dry, well-ventilated area, away from strong oxidants, bases and heat sources. Wear nitrile gloves, safety goggles and dust mask; avoid inhalation, skin/eye contact and ingestion to prevent mild irritation (Xi, R36). Reseal tightly after use; neutralize waste with dilute alkali before disposal; avoid direct water discharge to protect the environment.

4-Methylsulphonylphenylacetic acid is a low-toxic sulfonyl aromatic acid with excellent stability and high functional group reactivity (carboxyl/sulfonyl). 4-Methylsulphonylphenylacetic acid CAS 90536-66-6 offers good solubility in common organic solvents, high reaction yield, and the methylsulfonyl group enhances molecular polarity for targeted bioactivity and material compatibility, ideal for pharmaceutical and fine chemical synthesis with consistent quality and processability.