4-Phenylbenzoic acid is an important biphenyl carboxylic acid fine chemical intermediate extensively used in liquid crystal material, pharmaceutical and dye synthesis fields. The biphenyl rigid skeleton with terminal carboxyl group is core building unit for esterification and amidation reactions. In liquid crystal industry, it is key raw material for synthesizing aromatic ester liquid crystal monomers, improving liquid crystal phase transition temperature and dielectric properties of finished liquid crystal products for display screen manufacturing. For pharmaceutical industry, it is applied to prepare anti-inflammatory, anti-bacterial and anti-tumor small molecule intermediates via carboxyl derivatization such as acyl chloride and amide formation. Dye factories utilize it to synthesize high light-fastness disperse dyes and organic pigment intermediates with excellent weather resistance. Besides industrial production, high-purity grade serves as reference standard substance for HPLC calibration in chemical testing laboratories and substrate for organic synthesis methodology research in university R&D labs. Bulk products are packed in 25kg fiber drum with inner PE bag for global fine chemical purchasers.

GHS Classification:H315(Skin irritation), H319(Serious eye irritation), H335(May cause respiratory irritation) Signal Word:Warning Risk Code:R36/37/38; Safety Code:S26, S36/37/39 Low acute oral toxicity, but crystalline dust irritates skin, ocular and respiratory mucosa. Direct skin contact induces redness and itching; flush contaminated skin with abundant running water for over 15 minutes once exposed. Fine powder splashing into eyes causes stabbing pain and conjunctival hyperemia, keep continuous eye washing no less than 15 min and consult doctor for persistent discomfort. Inhalation of dust triggers dry throat and cough; all weighing and feeding operations must be conducted in ventilated fume hood equipped with nitrile gloves, dust-proof goggles and disposable dust respirator. Store separately from foodstuff, strong alkaline chemicals and strong oxidants in cool dry shaded warehouse. Waste solid and filtrate are treated as general organic hazardous waste complying with local environmental regulations, prohibited arbitrary drainage into water and soil.