China Top 10 Pharmaceutical Grade Activated Carbon Suppliers?

No.	Evaluation Dimension	Typical Pharmaceutical-Grade Requirement or Data	Why It Matters	Common Verification Method
1	Applicable Pharmacopoeial Compliance	Conformity should be demonstrated against the applicable current pharmacopoeial monograph, such as USP–NF, Ph. Eur., BP, or another recognized standard.	“Pharmaceutical grade” is not one universal specification; requirements depend on the intended use and market.	Current certificate of analysis, monograph testing, and regulatory documentation review.
2	Raw Material Source	Common carbonaceous precursors include coconut shell, wood, peat, and coal; the precursor should be declared and controlled for each batch.	The precursor affects pore structure, ash content, adsorption behavior, and potential contaminants.	Supplier questionnaire, traceability records, incoming-material testing, and risk assessment.
3	Iodine Number	Many commercial activated carbons are specified within an approximate range of 700–1,200 mg/g, although the required value depends on the application and approved specification.	It is an indicator of micropore development and adsorption capacity for relatively small molecules.	Iodometric titration using a recognized activated-carbon test method, such as ASTM D4607.
4	Methylene Blue Adsorption	A commonly reported commercial range is approximately 150–300 mg/g; the target should be established for the specific product and use.	It provides information about adsorption of larger molecules and mesopore accessibility.	Validated methylene blue adsorption test with a defined sample preparation procedure.
5	Moisture and Loss on Drying	Powdered activated carbon commonly has moisture controlled around or below 5–10%, depending on the product specification and test conditions.	Excess moisture can affect net active content, flowability, storage stability, and adsorption performance.	Gravimetric loss-on-drying test at a specified temperature and drying time.
6	Total Ash and Inorganic Residue	Pharmaceutical applications generally require controlled ash and inorganic residue; exact limits must follow the approved monograph or product specification.	High ash may reduce adsorption capacity and introduce undesirable inorganic substances.	Ignition or ashing test followed by gravimetric determination.
7	Heavy Metals and Elemental Impurities	Elemental impurities should comply with the applicable risk-based limits, commonly assessed under ICH Q3D and relevant regional requirements.	Carbon materials can contain trace levels of lead, arsenic, cadmium, mercury, and other elements depending on their source.	ICP-MS, ICP-OES, or another validated elemental-analysis technique.
8	Particle Size and Physical Form	Available forms include powder, granules, and molded products; particle-size distribution should match the intended dosage or processing method.	Particle size influences dispersion, filtration, handling, dissolution behavior, and adsorption kinetics.	Sieve analysis, laser diffraction, or another validated particle-size method.
9	Microbiological Quality	Total aerobic microbial count, total yeast and mold count, and specified microorganisms should meet the limits established for the intended pharmaceutical use.	Activated carbon is a porous material that can retain moisture and environmental contaminants if not properly controlled.	Pharmacopoeial microbial enumeration and specified-microorganism tests.
10	Quality System, Packaging, and Traceability	A suitable supplier should provide batch traceability, change control, deviation management, tamper-evident packaging, and storage conditions that protect the material from moisture and contamination.	Consistent documentation and controlled handling are essential for pharmaceutical supply-chain qualification.	GMP audit, quality agreement, batch records, certificates of analysis, and packaging inspection.