Overview
Pig bile is a biological secretion extracted from porcine gallbladders, valued for its complex biochemical composition. Historically used in Traditional Chinese Medicine (TCM) for over 2,000 years, it contains primary active components including cholic acid, hyodeoxycholic acid (HDCA), and conjugated bilirubin. Modern applications extend to Western pharmaceuticals where it serves as a precursor for steroid synthesis and emulsifying agents. The global market sources pig bile primarily from regulated slaughterhouses, with China being the dominant producer. Industrial processing involves filtration, sterilization, and concentration to create standardized extracts. Ethical sourcing and compliance with veterinary regulations are critical considerations for B2B buyers.
Physical and Chemical Properties
As a biological fluid, pig bile exhibits pH-dependent properties ranging from 7.6-8.6 in fresh samples. Its characteristic bitterness stems from bile salts like sodium glycocholate, which constitute 10-15% of dry weight. The dark coloration results from oxidized bilirubin derivatives, while viscosity varies with water content (typically 85-92%). Key chemical markers include ≥4% total bile acids (USP standards) and ≤0.1% residual ethanol in processed forms. When exposed to air, enzymatic oxidation causes gradual darkening. Industrial users should note its hygroscopic nature and incompatibility with strong oxidizers during formulation processes.
Main Applications
In TCM formulations, pig bile appears in detoxification remedies and ophthalmological preparations, often processed into dried powder (Dan Fen). Modern pharmaceutical applications leverage its bile acids for synthesizing ursodeoxycholic acid (UDCA), a treatment for cholesterol gallstones. The food industry employs it as a natural emulsifier in specialty products. Industrial uses include leather processing where bile salts assist in fat removal during tanning. Emerging research explores antimicrobial applications in biodegradable preservatives. Notably, HDCA derivatives show promise in metabolic disorder therapeutics, driving demand for high-purity (>98%) isolates in pharmaceutical intermediates.
Safety and Storage
Workplace safety protocols require PPE for handlers due to potential pathogen exposure in raw materials. Processed bile must meet microbial limits (<1000 CFU/g total count) and be tested for Salmonella. Allergen warnings apply to individuals with porcine product sensitivities. Proper storage involves refrigeration in amber glass or food-grade HDPE containers with nitrogen blanketing to prevent oxidation. Shelf life typically reaches 24 months at 2-8°C. Transportation should maintain cold chain integrity, with temperature logs provided for pharmaceutical-grade shipments. Industrial users should conduct compatibility tests before bulk polymer or solvent mixing.
B2B Procurement Guide
Reputable suppliers should provide certificates of analysis including HPLC bile acid profiles, heavy metal screens (Pb<5ppm, As<3ppm), and veterinary clearance documents. For pharmaceutical applications, validate GMP compliance and absence of tetracycline antibiotics commonly used in livestock. Pricing tiers depend on processing level: crude extracts ($50-80/kg), refined bile acids ($120-180/kg), and USP-grade HDCA ($400+/kg). Minimum order quantities typically start at 25kg for industrial buyers. Consider toll processing options for custom concentrations or solvent exchanges. Audit suppliers for ethical sourcing practices and wastewater treatment capabilities.
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