HCG vs HMG China Supplier: IU and COA Guide

Classify HCG and HMG correctly

Write separate controlled specifications that identify HCG as the requested glycoprotein hormone material and HMG as its own defined gonadotropin preparation or composition. State source or production route, relevant subunit or composition information, physical form, potency specification, quantity, intended RUO scope and required documents. Do not treat either item as a single-sequence synthetic peptide and do not map them as synonyms. The quotation, COA, potency record, label and packing list must use a consistent product name, SKU and batch identity.

Understand why IU cannot be compared as mass

An International Unit is tied to a defined biological-activity basis and is not a universal weight conversion. HCG 1,000, 2,000, 5,000 and 10,000 IU describe different stated potency levels, while HMG 75 IU belongs to a different product specification. Never calculate an HCG-to-HMG equivalence by dividing IU numbers or comparing vial price alone. Ask which reference standard, assay and acceptance range support the labeled potency and record mass, protein content and potency as separate fields where available.

Compare the four HCG formats without silent substitution

Create separate RFQ rows for each HCG strength with vial count, units per kit, total nominal IU, assay tolerance, parent lot, finished lot, packaging and price basis. One 10,000 IU vial is not operationally identical to two 5,000 IU or ten 1,000 IU vials because filling, formulation, labels and inventory controls differ. Confirm whether strengths share a parent lot and how genealogy is retained. Prohibit strength substitution and compare offers only after potency method, formulation and document scope are aligned.

Match the COA to glycoprotein and composition questions

Request batch-specific identity, composition, purity and potency evidence appropriate to the exact material and production route. HPLC or MS may contribute information, but a peptide-style purity percentage alone cannot establish glycosylation, subunit composition, biological potency, finished-vial IU or all process-related attributes. Review sample IDs, methods, references, results, specifications, dates and authorization. For HMG, confirm how the stated component activities or composition are defined rather than assuming one generic 75 IU result describes every relevant attribute.

Control storage, labels and receiving without use guidance

Obtain supplier-supported storage and transport conditions for each finished format, packaging configuration, monitor expectations and an excursion process. Approve labels showing full material name, stated IU, lot and RUO wording. Map manufacturer, testing laboratory, filler, release authority, stock owner and shipper. At receipt, inspect packaging, product, strength, lot, quantity and available monitor records. Quarantine unexplained potency, identity, composition, temperature or document differences. This procurement review does not provide instructions for administration or biological use.

Build one comparable wholesale RFQ matrix

Send every candidate the same fields: controlled identity, strength, vial count, total material, target purity or composition, identity method, quantitative-content basis, offered lot, testing status, packaging, documents, MOQ, lead time and shipping term. Mark missing answers as exceptions instead of filling gaps with assumptions. Separate testing, setup, customization and transport costs from recurring unit price. A standardized matrix gives scientific, purchasing and quality reviewers one auditable record and prevents an incomplete offer from appearing cheaper simply because it describes less work.

Apply a batch-focused quality-control review

Define every required attribute, acceptance criterion, method and record before purchase. Use the quality-control framework to connect each supplier claim to evidence and its method scope. Check sample identifiers, dates, report numbers, units and lot relationships across the complete reports. Batch-specific evidence is more decision-useful than a representative certificate. Preserve original files, record revisions and investigate contradictions before approving shipment. Where risk warrants, arrange independent testing under a documented sampling and custody plan.

Create a documentation gate before dispatch

List the required batch COA, analytical attachments, SDS, specification, supported storage statement, label proof, invoice and packing list in the RFQ and purchase order. Reconcile product, strength, lot, quantity and revision across records with the documentation guide. Require replacement documents when the offered lot changes. The importer remains responsible for current destination requirements. Research-use wording improves clarity but cannot guarantee customs entry or replace destination-specific legal and broker review.

Verify supplier and batch ownership

Document the legal seller, manufacturing site, analytical laboratory, filling or packaging site, inventory owner, release authority and dispatch entity for the exact SKU. A trading or coordination company can work with qualified partners, but roles and accountability must be transparent. Ask who owns the batch record, authorizes release, handles deviations and provides corrective action. Require advance notification when a critical party changes. Business-registration evidence supports identity but does not replace technical qualification of the offered lot.

Plan logistics and receiving controls

Confirm dispatch location, carrier, shipping term, packaging configuration and realistic production, release and transit windows. Reject guarantees of customs clearance or misleading declarations. On receipt, document package condition, seals, product, strength, lot and quantity, then connect internal inventory to the supplier batch. Store according to the applicable approved specification and quarantine unexplained damage, label conflicts, quantity differences or excursions until a documented quality decision is completed.

Use actual performance for repeat-order approval

A controlled evaluation order should use the same specification and evidence expectations planned for wholesale scale. Assess document accuracy, packaging, delivery time, communication and corrective response. Update a supplier scorecard from observed performance rather than catalog breadth or claims. For every new lot, repeat the batch review and approve current documents before dispatch. Require notification before changes to material specification, manufacturing, testing, filling, labels, packaging or other buyer-approved conditions.

Related products and same-category guides

• HCG 1,000 IU
• HCG 2,000 IU
• HCG 5,000 IU
• HCG 10,000 IU
• HMG 75 IU
• Gonadorelin vs Triptorelin Guide
• COA and SDS Documentation Guide

Frequently asked questions