Capability
Small Molecule API CDMOs
Compare CDMOs specializing in small molecule API synthesis from route scouting through commercial manufacturing. Filter by chemistry capabilities, scale, and regulatory approvals.
516 companies listed
For a small molecule API, the synthetic route is the program. A CDMO's process chemists decide how you get from raw materials to drug substance: how many steps, what yield, and which impurities you'll spend the next two years explaining to regulators. Route scouting and development are where a strong API partner earns its fee. Crystallization is the part buyers underestimate. It controls polymorphic form and particle size, and a polymorph surprise during scale-up has delayed more filings than most people admit. So probe the chemistry. Have they run your reaction types (hydrogenation, cryogenic steps, flow chemistry) at kilo-lab through metric-ton scale? Is the API high-potency, needing OEB4/5 containment? Do they have ICH Q11 filings and a defensible regulatory starting material strategy? 516 CDMOs here list small molecule API synthesis. Compare them on chemistry, scale, and regulatory experience.
About Small Molecule API Manufacturing
Active Pharmaceutical Ingredient (API) manufacturing is the chemical synthesis of the drug substance itself. For small molecules, this involves multi-step organic chemistry from raw materials to the final API, requiring expertise in reaction chemistry, purification, crystallization, and process optimization.
Process chemistry determines project success. A strong CDMO identifies the most efficient synthetic route, optimizes reaction conditions for yield and purity, and develops a process that scales reliably from gram to metric ton quantities. Crystallization expertise is particularly critical for controlling polymorphic form and particle size distribution.
Companies (516)
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ResolveMass Laboratories Inc.
Canada
ResolveMass Laboratories Inc. is a Canadian pharmaceutical CRO and CDMO providing analytical testing, characterization, and drug development support for pharmaceutical, biotechnology, and medical device companies worldwide. Our expertise spans small molecules, peptides, biologics, biosimilars, oligonucleotides, polymers, and complex drug products. We offer specialized services including mass spectrometry (LC-MS/MS, LC-HRMS), peptide characterization, impurity identification, nitrosamine analysis, extractables and leachables (E&L) studies, bioanalytical testing, stability studies, method development, and regulatory support. Our multidisciplinary scientific team helps clients address complex analytical challenges and generate high-quality data to support research, development, manufacturing, and regulatory submissions. ResolveMass Laboratories operates from Canada and serves clients across North America, Europe, and Asia. The company maintains an ISO 9001:2015 certified Quality Management System, is FDA-registered, and holds a Health Canada Drug Establishment Licence for GMP-compliant operations. We are committed to delivering scientifically rigorous, reliable, and timely solutions that accelerate drug development and support regulatory success.
Analytical ServicesStability StudiesMethod Development & Validation
Aarti Pharmalabs Limited
India
Aarti Pharmalabs Limited is a leading Indian small-molecule CDMO specializing in API and drug substance development and manufacturing. They operate six manufacturing plants with two R&D centers, accredited by USFDA, EU GMP, EDQM, and KFDA. They provide services from process R&D through stability studies, scale-up, process validation, and commercial manufacturing, including high-potent/cytotoxic molecules and flow chemistry.
Small Molecule APISmall Molecule Drug ProductOral Solid Dose
Frequently Asked Questions
What is the difference between API and drug product?+
API (Active Pharmaceutical Ingredient) is the chemical compound that provides the therapeutic effect. Drug product is the final dosage form (tablet, capsule, injectable) that patients use. API manufacturing involves chemical synthesis; drug product manufacturing involves formulation and filling. Some CDMOs do both; many specialize in one.
How do you evaluate an API CDMO's chemistry capabilities?+
Check their experience with your reaction types (hydrogenation, cryogenic chemistry, Grignard reactions, flow chemistry). Review their equipment (reactors from lab to multi-thousand-liter scale, high-pressure capability, continuous processing). Ask about their analytical support (in-process controls, impurity profiling, polymorph screening). Experience with ICH Q11 regulatory filings demonstrates maturity.
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