To verify HCG, match three separate identifiers: the listed SKU, the nominal iu size of each vial, and the batch number on a published certificate of analysis. The HCG product listing shows four public SKU codes—G1K, G2K, G5K, and G10K—each with a stated per-vial size in iu and 10 vials per pack. Catalog sizes are nominal. Recorded laboratory results apply only to the named batch and SKU on that COA.
Listed SKUs, vial size, and pack quantity
Site editorial guidance is to read per-vial size, vials per pack, and pack price as three separate fields. That guidance is not independent scientific evidence. A pack of ten vials of a given size is not a single vial containing the arithmetic sum of the pack. That sum is label arithmetic, not an analytical measurement. Actual fill and content measurements belong to the particular batch report (per-vial size versus pack quantity).
Public listed HCG variants on the product page are:
| SKU | Nominal size per vial | Unit | Vials per pack |
|---|---|---|---|
| G1K | 1000 | iu | 10 |
| G2K | 2000 | iu | 10 |
| G5K | 5000 | iu | 10 |
| G10K | 10000 | iu | 10 |
The same listing states that these are public listed variants only, at most 40, and not a claim that the list is exhaustive. CAS number, molecular formula, and molecular weight are recorded as unknown on that page (HCG).
Editorial pre-order checks on the SKU-reading guide are: match the exact product and SKU; check the per-vial size and unit; check the number of vials per pack; set the number of packs required; and review the matching batch records. If a quotation uses a different packaging description, ask support to reconcile it before relying on the calculation (SKU reading guidance).
Match the COA to SKU and batch, not only to the product name
A SKU identifies a listed product variant. A batch number identifies a batch record. A product name by itself is not enough when several sizes exist. Editorial guidance is that a report for one size should not be used as evidence for another size merely because both share a product name, and that an older published batch is not evidence of the batch that will be shipped next (how to find a COA by SKU and batch).
Open the product page, select the SKU, and read the matching certificate panel. Selecting a SKU updates the report. Open a batch’s fixed page to share its results. Match the original document before relying on it.
If a public result is missing, ask support for the exact SKU and batch. A missing public result is not automatically a failed test, and it is not a passed test either. If a previously shared report link is no longer available, ask for current documentation rather than substituting a different batch.
Published batch COAs for G1K, G2K, and G5K
The records below are published recorded results for those batches only. They are not evidence of clinical suitability or of every batch. Provider verification links were not independently fetched.
All three certificates name the laboratory as Stand Science & Technology Pharmaceutical (Qingdao) Co., Ltd. (Stand Group) and give test date 2026-07-16.
| Field | G1K batch 03FWOCSTJ98R | G2K batch QA5JWQVYDPJ8 | G5K batch Z8PS14DQ4J4S |
|---|---|---|---|
| Certificate | QC-2026-YVAQWQ7CUK | QC-2026-A99FWPGXZW | QC-2026-FBRHVKT8RD |
| Listed size | 1000 iu | 2000 iu | 5000 iu |
| Appearance (Visual) | White loose powder; spec White or almost white loose powder; Pass | White loose powder; spec White or almost white loose powder; Pass | White loose powder; spec White or almost white loose powder; Pass |
| Identity (HPLC) | Conforms; spec HCG present, consistent with reference; Pass | Conforms; spec HCG present, consistent with reference; Pass | Conforms; spec HCG present, consistent with reference; Pass |
| Purity (HPLC) | 98.0 %; spec NLT 95.0 %; Pass | 99.3 %; spec NLT 95.0 %; Pass | 97.6 %; spec NLT 95.0 %; Pass |
| Assay (HPLC) | 1147 IU; spec 1000 IU (80-125 % label); Pass | 2237 IU; spec 2000 IU (80-125 % label); Pass | 5651 IU; spec 5000 IU (80-125 % label); Pass |
| Water content (Karl Fischer) | 3.2 %; spec NMT 5.0 %; Pass | 3.4 %; spec NMT 5.0 %; Pass | 2.9 %; spec NMT 5.0 %; Pass |
| Sterility (Membrane filtration (USP <71>)) | Sterile; spec No growth; Pass | Sterile; spec No growth; Pass | Sterile; spec No growth; Pass |
| Bacterial endotoxins (LAL (gel-clot)) | <2.5 EU/1000 IU; spec NMT 5 EU/1000 IU; Pass | <2.5 EU/1000 IU; spec NMT 5 EU/1000 IU; Pass | <2.5 EU/1000 IU; spec NMT 5 EU/1000 IU; Pass |
No G10K (10000 iu) batch COA is among these published records. That gap is not a recorded purity, assay, appearance, identity, water-content, sterility, or endotoxin result for G10K, and it is not a pass or a fail.
Confirm the certificate, then confirm the allocated batch
Start by matching product name, SKU, and batch number. Open the original report and compare its certificate number and test date with the summary. Then use the verification link for that report. A verification page may require an account with the report provider; seeing a link alone does not prove that a report is currently valid (how to verify a CertiPeptide COA).
Practical sequence from that editorial guidance:
- Read the product and SKU from the product page or order documentation.
- Find the batch in the published lab reports. If the allocated batch is not stated, ask support to confirm it.
- Open the batch page and check the certificate number, sample identity, test date, and listed laboratory.
- Open the original report and compare the values and units with the summary.
- Follow the report-specific verification link. If the provider requests login or the record cannot be confirmed, resolve that with the provider or support before treating verification as complete.
A published report does not mean every order receives that batch. Confirm the batch allocated to the order separately. Do not substitute a report for a similar product or a different size. When details differ, send support the SKU, batch number, and the specific difference. A screenshot of a certificate is useful for comparison, but the original document and provider record are stronger verification evidence.
Checklist before you treat a report as matching
- Product name is HCG on both the listing and the COA.
- SKU code matches the intended vial size (G1K = 1000 iu, G2K = 2000 iu, G5K = 5000 iu, G10K = 10000 iu).
- Pack quantity is read as 10 vials, not as one combined vial.
- Batch number on the allocation matches the COA batch page.
- Certificate number, test date (2026-07-16 for the three published examples), and laboratory name match the original report.
- Assay specification uses that SKU’s label IU (1000, 2000, or 5000 IU with 80-125 % label on the published G1K, G2K, and G5K examples), not another SKU’s assay.
- Endotoxin is compared with the recorded qualifier and unit on that same report: <2.5 EU/1000 IU versus NMT 5 EU/1000 IU for the three published examples.
- G10K is not treated as covered by the G1K, G2K, or G5K certificates.
- The published example batch is not assumed to be the next shipped batch.
Frequently Asked Questions
Can a G1K HCG COA be used as evidence for G2K, G5K, or G10K?
No. A SKU identifies a listed variant and a batch number identifies a batch record. A report for one HCG size should not be used as evidence for another size merely because both say HCG.
Does a published HCG batch report mean every order receives that batch?
No. Confirm the batch allocated to the order separately. An older published batch is not evidence of the batch that will be shipped next.
How many vials are in each listed HCG pack?
Each public listed SKU on the HCG product page—G1K, G2K, G5K, and G10K—is listed with 10 vials per pack. Per-vial size and vials per pack are separate fields.
What if there is no public COA for G10K?
No G10K batch COA is among the published records cited here. A missing public result is not automatically a failed test, and it is not a passed test either. Ask support for the exact SKU and batch.
What identifiers should match on an HCG COA?
Match product name, SKU, and batch number, then compare certificate number, test date, laboratory name, values, and units with the original report. Seeing a verification link alone does not prove that a report is currently valid.
Explore Further
Browse our research peptide catalog and review third-party lab reports & COAs for published batches.
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Research use only. The information above is provided for educational and laboratory research purposes only. The compounds discussed are not approved for human or veterinary use, diagnosis, treatment, or the prevention of any disease. Nothing here is medical advice.
