UDCA API Sourcing & Cost Guide 2026: Ursodiol Price, Specs & Suppliers

UDCA (ursodeoxycholic acid, ursodiol) API cost is not a single number. The price a buyer pays depends on pharmacopoeia grade, regulatory filings, order volume, and the manufacturer’s feedstock position. This guide settles three questions for procurement teams: what actually drives ursodiol cost, what documentation separates a qualified ursodiol manufacturer from a trader, and how to structure bulk orders from 25kg drums to tonnage.

What is ursodiol? Ursodiol is the United States Adopted Name for ursodeoxycholic acid (UDCA), a naturally occurring hydrophilic bile acid whose ursodiol drug class is gallstone-dissolving agents. Its mechanism of action — how does ursodiol work — is to replace toxic hydrophobic bile acids in the bile pool, reducing bile toxicity and promoting cholesterol stone dissolution. Its main ursodiol uses are the dissolution of radiolucent cholesterol gallstones and the treatment of primary biliary cholangitis (PBC), with emerging applications in non-alcoholic fatty liver disease. For API buyers, understanding the ursodiol mechanism of action matters because it explains the purity requirements that separate pharmacopoeia-grade material from technical grade.

Whether you are a generic api supplier evaluator at a pharmaceutical company, a QA manager preparing a vendor file, or a trading house quoting UDCA to downstream formulators, the structure below gives you the decision framework in order: cost anatomy first, then documentation requirements, then supplier verification, then buying mechanics. Each section ends with the concrete action a procurement team should take.

1. Ursodiol Cost Breakdown & Price Drivers

When comparing quotations, remember that ursodiol manufacturers with larger volumes can dilute fixed regulatory costs across more kilograms — one reason scale affects ursodeoxycholic acid price more than most APIs.

Demand-side, ursodiol for gallstones and PBC therapy remains the anchor market: roughly 10-15% of adults in developed countries carry gallstones, and UDCA is one of the few non-surgical options for cholesterol stones in patients with functioning gallbladders. That steady clinical demand, combined with supply concentration, is why ursodiol price rarely falls even when feedstock prices ease.

The cost of ursodiol is dominated by its feedstock. Cholic acid, extracted from animal bile, accounts for roughly 60% of total UDCA production cost. When slaughter volumes decline — disease outbreaks, seasonal shifts, or changing meat consumption — cholic acid prices rise and ursodiol price follows. Manufacturers with long-term slaughterhouse contracts and multi-source bile procurement are better insulated and can hold pricing more stable.

On top of feedstock, four cost layers separate the price tiers. First, pharmacopoeia compliance: EP and USP monographs set tight limits on related substances — CDCA and lithocholic acid — requiring chromatography or recrystallization that can add 30-40% to manufacturing cost versus technical grade. Second, regulatory filings: maintaining an active CEP with EDQM or Type II DMF with FDA carries annual fees, stability programs, and inspection costs that are amortized across volume. Third, synthesis route: enzymatic production, now roughly 55% of global supply, yields higher purity with cleaner impurity profiles but carries a heavier fixed-cost base. Fourth, quality system overhead for GMP/ICH Q7 compliance.

How much does ursodiol cost in practice? In 2026 the market spans three tiers: EP-grade with active CEP at $200-280/kg; EP or USP grade without CEP at $140-220/kg; and non-pharmacopoeia grade at $100-150/kg. Within each tier, ursodeoxycholic acid price moves with order volume — a 10kg first order typically carries a 15-25% per-kg premium over a 100kg order.

Cost Layer	Impact on ursodiol price	What buyers should verify
Feedstock (cholic acid)	~60% of production cost	Supplier’s bile procurement contracts & multi-source position
Pharmacopoeia compliance	+30-40% vs technical grade	EP/USP monograph limits, impurity profile on CoA
Regulatory filings	CEP premium 15-25%; DMF maintenance fees	Active filing numbers; inspection history
Synthesis route	Enzymatic > chemical epimerization	Manufacturing route in supplier dossier
Order volume	15-25% premium at 10kg vs 100kg+	Volume break points; annual contract terms

Why is ursodiol so expensive compared with most other APIs? The short answer is scale and biology. UDCA is not manufactured from petroleum intermediates like many synthetic drugs; it is derived from animal bile through cholic acid, a supply chain tied to slaughter volumes, seasonal collection, and bile processing capacity concentrated in a handful of countries. When feedstock tightens, the price signal is direct and fast. Buyers who plan annual requirements and lock supply agreements early avoid the worst of feedstock-driven spikes.

The synthesis route also separates price levels. Enzymatic conversion of cholic acid to UDCA — now the dominant process — produces a cleaner impurity profile and higher yield per kilogram of feedstock, but requires investment in enzyme technology and fermentation capacity. Chemical epimerization remains viable at smaller scale and lower capital cost, at the expense of more byproducts and additional purification passes. When a supplier claims a premium ursodiol price, the manufacturing route disclosed in the dossier should justify it.

For 2026, buyers should expect continued upward baseline pressure: consolidation among Chinese producers, stricter environmental inspection of bile processing facilities, and sustained demand from the PBC and gallstone therapy markets all support pricing near the top of each tier. The practical response is not to bargain on specification but to negotiate volume bands, contract duration, and feedstock-indexed price adjustments.

2. UDCA Specifications & DMF/VMF Documentation

Pharmacopoeia grade is the first filter. EP and USP UDCA monographs specify a minimum of 99.0% purity with individual related-substance limits — typically CDCA below 0.5% and lithocholic acid below 0.1% — plus limits on heavy metals, residual solvents, and microbial quality. CP-grade (Chinese Pharmacopoeia) material is common in Asian markets. The documentation bundle a buyer should receive with every batch is: Certificate of Analysis (CoA) with HPLC purity and impurity data; residual solvent statement per ICH Q3C; GMP certificate; TSE/BSE statement for animal-origin feedstock; and, where applicable, active DMF (Type II) or CEP numbers.

Naming matters in procurement: ursodeoxycholic acid brand name variants (Actigall, Urso) refer to finished products, while the API you buy is the ursodiol generic name substance itself. Sourcing by the generic name avoids brand-premium confusion and is the correct basis for DMF-referencing.

For pharmaceutical registration, the filing status matters as much as the spec. An active CEP simplifies EU dossier submissions because the API section can reference the certificate. A Type II DMF with FDA supports ANDA filings. Veterinary markets require a VMF (Veterinary Master File) pathway. Buyers targeting multiple markets should shortlist manufacturers whose filing portfolio matches the target markets — one supplier with CEP, DMF and VMF support covers more routes to market than three suppliers with single filings.

Document	Purpose	Request with
CoA (full HPLC)	Purity + impurity profile per batch	Every quotation & shipment
GMP certificate	Quality system compliance	Supplier prequalification
CEP (EDQM)	EU dossier simplification	EU-market sourcing
Type II DMF (FDA)	US ANDA support	US-market sourcing
VMF (FDA)	Veterinary API registration	Vet-market sourcing
TSE/BSE statement	Animal-origin feedstock safety	All regulated markets
Stability data	Shelf-life & storage conditions	Long-term contracts

The differences between pharmacopoeia standards matter in procurement. EP and USP both require a minimum of 99.0% purity for UDCA, but the impurity limits and test methods differ in detail: EP sets tighter control on lithocholic acid, while USP emphasizes identification and assay reproducibility across batches. Chinese Pharmacopoeia (CP) grade is widely accepted across Asia and aligns closely with EP in its current edition. A supplier offering "pharmacopoeia grade" without naming the monograph is a red flag — the monograph defines the spec, and a CoA should state which one was applied.

Verifying a DMF or CEP filing takes minutes and is worth doing for every shortlisted manufacturer. CEP numbers can be checked against the EDQM public database; FDA DMF numbers are confirmed through the agency's drug master file list. A manufacturer that hesitates to share its filing numbers is usually trading on someone else's documentation. For veterinary products, request the VMF pathway and confirm the filing covers the specific manufacturing site that will produce your batch.

Documentation is not one-time. Insist on a documentation schedule in the supply agreement: CoA with every batch, annual stability data updates, immediate notification of regulatory changes, and the right to audit. These clauses cost nothing in negotiation and protect the registration work your regulatory team will do with the supplier's dossier.

Monograph	Purity Minimum	Key Control Points	Typical Market Use
EP (Ph. Eur.)	99.0%	Lithocholic acid, CDCA limits; tight related-substance control	EU, Asia, many emerging markets
USP	99.0%	Assay reproducibility, identification, heavy metals	US, Americas, Australia
CP (Ch. P.)	99.0%	Close alignment with EP in current edition	China, Asia-Pacific
Technical grade	98-99%	No pharmacopoeia compliance statement; research/vet/supplement use	R&D, veterinary, supplements

Dosage context helps buyers match API spec to use: typical ursodiol dosage in clinical practice is 8-13 mg/kg/day for gallstone dissolution, and 13-15 mg/kg/day for PBC, and the ursodiol maximum daily dosage is around 1,500 mg in adults. These parameters matter because they define the tablet strengths your formulation team will target — and therefore the particle size and flow specifications you should request.

3. Qualified Generic API Supplier Checklist

The ursodiol generic API market has real differentiation between manufacturers and traders. A qualified generic api supplier can be verified with a five-point checklist that covers both the purchasing and QA functions in a pharmaceutical company.

For an api pharmaceutical company or contract manufacturer auditing UDCA supply, the same checklist applies with one addition: confirm the API is manufactured at the site named on the filing, not at a subcontractor without its own GMP certificate.

Check	What to verify	Red flags
GMP & inspection history	Current GMP certificate; recent FDA/EU/WHO inspection outcomes	GMP claim without certificate or inspection record
Regulatory filings	Active CEP/DMF/VMF numbers you can verify with the agency	Refusal to share filing numbers
Manufacturing depth	Own api pharmaceutical manufacturing site vs trading only; synthesis route disclosed	No own plant; vague route description
Quality systems	CoA per batch, full impurity profile, stability program, deviation handling	CoA without impurity data
Supply reliability	Feedstock contracts, backup sourcing, lead time history, capacity for 25kg-1,000kg	No committed feedstock position

KingWish, an ursodiol manufacturer operating GMP-compliant production since 2006, supports buyers with CEP/DMF documentation, full CoA data, and tonnage supply from Qingdao, China. See our manufacturer audit checklist for the full audit protocol.

The most common procurement mistake is treating an export trader as a manufacturer. Traders can supply certificates and samples, but they cannot show you the reactor, the purification train, or the bile feedstock contracts. Ask for a site visit or a virtual audit: the manufacturing site address should match the GMP certificate, the filing, and the CoA header. Discrepancies between these three documents are the fastest way to disqualify a supplier.

Batch-to-batch consistency deserves its own check. Request CoAs from three consecutive batches and compare the impurity profiles — a qualified ursodiol manufacturer holds a tight range on every impurity, while a variable supplier drifts. Consistency matters more than the headline purity number, because your formulation and registration data depend on a stable input.

Finally, match supplier scale to your own demand profile. A large manufacturer may not prioritize a 25kg first order, while a mid-size producer with committed feedstock can give small and growing buyers dedicated attention. The right ursodiol manufacturer for a 100kg/year buyer is often not the largest name in the market, but the one whose capacity, filing portfolio and service level align with the buyer's five-year plan.

The audit itself can be staged. A desk audit covers documentation: GMP certificate, filing numbers, CoA history, stability data, and the quality manual. A remote audit adds a live walk-through of the production line via video, with the supplier explaining each unit operation from bile feedstock intake to final drying and packaging. For regulated buyers, an on-site audit remains the gold standard — schedule it around a production run of your own batch so you observe the actual process rather than a prepared demonstration.

Throughout this guide, "API" refers to the active pharmaceutical ingredient — the ursodiol substance itself, distinct from the finished dosage form. A true api active pharmaceutical ingredient supplier sells the substance with full regulatory documentation, not a repackaged intermediate.

4. Bulk Sourcing Options: 25kg Drums to Tonnage

Bulk ursodiol procurement scales in four bands, each with different economics. A first order of 10-25kg validates quality and documentation before volume commitment. The 100kg band is the first volume break — typically 10-15% below small-lot pricing. Tonnage contracts (500kg+ per year) negotiate the best per-kg rate and can include price bands tied to feedstock cost benchmarks, plus reserved capacity during supply tightness.

Buy ursodiol with the packaging and terms matched to your use: 25kg drums with double PE liner are standard for API; drum sizes of 10kg, 25kg and 50kg cover R&D through production. Confirm the Incoterm (FOB Qingdao or CIF destination), lead time (typically 2-4 weeks for standard specs), and whether documentation fees for regulatory filings are included in the quoted ursodiol price.

Order Band	Typical Use	Pricing Note
10-25 kg (first order)	Spec validation, registration batches	15-25% per-kg premium vs 100kg
100 kg	First volume break	10-15% below small-lot
500 kg - 1,000 kg / year	Commercial production	Best per-kg rate; price-band contracts
Tonnage (1,000 kg+)	Multi-market launches	Feedstock-indexed pricing; capacity reservation

Logistics is part of the landed cost. From Qingdao, FOB shipments to South Asia, the Middle East and Latin America typically run 2-4 weeks; refrigerated or expedited air freight shortens this at a significant per-kg premium. Budget for customs and documentation: an API shipment to a regulated market needs the CoA, GMP certificate, and any import license paperwork the destination country requires. A supplier that handles export documentation routinely removes a hidden cost from your supply chain.

Long-term contracts deserve structured pricing. A 12- to 24-month agreement with a fixed price band tied to a minimum annual volume gives the supplier visibility to reserve feedstock and capacity, and gives the buyer price certainty. Include a price adjustment mechanism linked to a published cholic acid or bile acid cost benchmark so the contract stays fair for both parties if feedstock shifts materially mid-term.

KingWish structures ursodiol supply across all four bands, from 25kg validation orders to tonnage contracts, with CoA, CEP/DMF documentation support and consistent lead times from Qingdao. The combination of feedstock position, GMP manufacturing and export experience since 2006 makes KingWish a practical partner for buyers moving from sample to scale.

Customs classification and import permits should be confirmed before placing the order, not after shipment. UDCA API typically falls under HS 2918.16 (bile acids and derivatives) in most markets; confirm the classification with your customs broker because misclassification delays clearance and incurs storage costs. Some markets require the importing company to hold a pharmaceutical import license before an API shipment can clear — verify this with the destination country's drug authority and ask your supplier for documentation templates that match the requirement.

5. Frequently Asked Questions

1. Where to Buy Ursodiol API?

Buy ursodiol directly from qualified manufacturers or their export arms. Shortlist 3-5 suppliers, verify GMP and DMF/CEP filing numbers, request reference batches with full CoA data, then negotiate MOQ, packaging, Incoterms and documentation. KingWish supplies ursodiol API from Qingdao with complete documentation support.

2. Why is ursodiol so expensive?

Roughly 60% of production cost is cholic acid feedstock from animal bile, and purification to pharmacopoeia limits on related substances adds further cost. Regulatory filings (CEP/DMF) carry annual fees and inspection costs. EP-grade with CEP runs $200-280/kg in 2026 versus $100-150/kg for non-pharmacopoeia grade.

3. How much does ursodiol cost in 2026?

Three tiers: EP + CEP at $200-280/kg; EP/USP without CEP at $140-220/kg; non-pharmacopoeia at $100-150/kg. Volume shifts price within each tier: 10kg carries a 15-25% premium over 100kg.

4. Is ursodiol generic API the same as the branded product?

The active substance is identical. The difference is regulatory evidence: a generic api supplier must hold its own DMF/CEP filings and provide the data your dossier needs. Sourcing ursodiol generic API from a qualified manufacturer cuts cost versus branded drug pricing.

5. What documentation should I request with a ursodiol API quote?

CoA with full HPLC purity and impurity profile, residual solvent statement (ICH Q3C), GMP certificate, DMF/CEP filing numbers, TSE/BSE statement, and stability data. Ask the supplier to itemize Incoterm, packaging, lead time and regulatory documentation fees.

6. Who makes ursodiol API?

Ursodiol API is manufactured by bile acid producers in China, India, Italy and Japan. Global supply is concentrated among Chinese producers with integrated cholic acid feedstock. Buyers should verify the manufacturer name on the CoA matches the GMP certificate and the DMF/CEP filing. KingWish manufactures ursodiol in Qingdao with GMP-compliant operations since 2006.

7. Where is ursodiol manufactured?

Most commercial ursodiol API is manufactured in China, where bile processing and cholic acid extraction infrastructure is concentrated. Manufacturing sites are typically in Shandong, Zhejiang and Jiangsu provinces. The manufacturing address on the CoA must match the GMP certificate and regulatory filing — a mismatch disqualifies the batch for regulated markets.