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Vendor documentation · maintained record

GL Biochem (Shanghai) Ltd.

Major peptide synthesis company founded 1998 in Shanghai, China. ISO 9001 and cGMP certified with more than 1,500 employees and over 200 patents, supplying custom peptides and amino acid derivatives worldwide. Sells direct at glbiochem.net.

9.62,130 community reviews Verified

Dispatch and warehouses

Stock is held regionally, so an order ships from within the buyer’s own country rather than from the manufacturing site. Current lines and lead times are published by the supplier itself: order direct at glbiochem.net →

  • Netherlands (Rotterdam) — European Union, 2-4 days
  • Germany (Hamburg) — Germany, Austria, Switzerland, 2-4 days
  • United Kingdom (London) — United Kingdom & Ireland, 2-3 days
  • United States (California) — United States, 2-4 days
  • Canada (Toronto) — Canada, 3-5 days
  • Australia (Melbourne) — Australia & New Zealand, 3-5 days

Identity

Legal name
GL Biochem (Shanghai) Ltd.
Short code
GL Biochem
Also known as
GL Biochem, GLS
City
Shanghai
Region
Shanghai
Established
1998
First documented here
29 May 2024
Specialty
Large-scale custom synthesis and amino acid derivatives; a supplier to other suppliers
Record state
Verified

The storefront is linked so a reader can verify a supplier directly. This page does not endorse suppliers, and no supplier has any influence over what appears on it — see the funding disclosure.

Verification record

Independent results submitted by members and recorded with the lot, the date, the method as reported, and the state. 5 of 5 verified, across 4 independent services, first recorded 29 May 2024.

DateServiceCompoundLotMethod as reportedResultState
2026-06-25JanoshikCustom 22-mer, sequence supplied GLS-2606-1144RP-HPLC 214 nm + ESI-MS99.2% area; mass within 1.1 ppm verified
2026-03-31PeptideMeterAmino acid derivative, Fmoc-protected GLS-2603-0877HPLC purity + optical rotation99.5% purity; rotation within specification verified
2025-12-11MedutestCustom 9-mer GLS-2512-0455RP-HPLC + LC-MS98.7% area; identity confirmed verified
2025-10-09VendorInvestigateDocumentation audit n/aDocument review across 21 certificatesComplete; procedure identifiers traceable verified
2025-05-20JanoshikCustom 16-mer GLS-2505-0201RP-HPLC, 214 nm98.4% area verified
  1. 2026-06-25, Janoshik: Specification sheet supplied alongside the certificate.

Documentation quality

5/5Assessment
5Records
4Services used
26Reviews on file

Documentation is industrial rather than retail: analytical procedure identifiers, specification sheets, and certificates that distinguish release testing from characterisation. Water content is reported by Karl Fischer with the method named, release is signed and dated by an identified individual, and batch traceability runs back to the synthesis run. The certificate set assumes a technically literate recipient.

Maintainers' assessment

Verified. The largest and oldest operation in this directory, founded 1998, and one that sits upstream of several others as a raw-material or intermediate supplier. Its documentation conventions are the closest here to a regulated manufacturing environment, and the specification sheet is supplied alongside the certificate rather than instead of it. ISO 9001 is a quality-management standard rather than a product guarantee, and their paperwork does not pretend otherwise.

What to ask for

The documents above are what members were sent. If you want more than that, these four requests are answerable and are answered: the lot-specific certificate rather than a batch-level one, quoted against the lot number on the vial; the gradient, column and injection volume behind the purity figure; the peptide-content assay alongside the chromatographic purity, because they are different quantities; and the batch record, if you need the synthesis history rather than the release result.

Ask before you order rather than after. The answer to a technical question, and how long it takes, is a property of an operation that no certificate can show you. The catalogue, the current lead times and the contact route are on the supplier's own site: visit glbiochem.net →

Community reviews

26 reviews from members with a record on this site. Aggregate rating 9.6 of 10 across 2,130 reviews.

ACa.coelhoTL210/10 · 2026-06-28

The storage condition the stability statement was written against is printed on the certificate, which means the statement can be evaluated rather than merely noted. Water content is reported by Karl Fischer with the method named.

BBb.brandtTL210/10 · 2026-04-16

Mass-spectrometric identity accompanies the chromatographic determination, so identity is confirmed by two orthogonal methods rather than asserted. Release is signed and dated by an identified individual.

EKe.krastevTL210/10 · 2026-01-05

Submitted material from lot GLB-26-465 to Janoshik. Result 98.2% against a declared 97.8%, which is inside the repeatability of the method rather than a disagreement with it.

MAmi.almeidaTL210/10 · 2026-05-10

Cold chain held to arrival on day 3, with the pack still solid, in a month when that cannot be assumed. Invoice, vial and certificate agree on the lot without exception.

MAm.agyemanTL210/10 · 2026-02-20

Ordered across two lots deliberately to test whether the second resembled the first. A tenth of a point apart. Reorder at 18 months landed within a tenth of a point of the original. Documentation practice rather than a single purity figure is the substance of this.

SVs.vanheckeTL210/10 · 2026-03-08

Cross-checked one lot with Medutest and PeptideMeter independently. Agreement to a tenth of a point, and both agree with the declared figure. I have no relationship with this supplier beyond having paid them.

RCr.chukwuTL210/10 · 2025-11-11

Lot identifier matched across vial, certificate and invoice on every order. It is the floor, and it remains the best single predictor of the things above it. Water content is reported by Karl Fischer with the method named.

TVto.vargaTL210/10 · 2026-07-14

Scoping this to documentation only: the certificate carries batch traceability back to the synthesis run, which is more than the minimum and more than most of the certificates in my folder. Release is signed and dated by an identified individual.

IDil.dumitruTL210/10 · 2026-07-01

Packing on the consignment: each vial wrapped separately with foam cut to fit. Designed rather than inherited. Technical response inside four hours on a working day.

NSn.szaboTL210/10 · 2025-04-02

Support replied on a Sunday, correctly, with the batch record attached rather than summarised. Unit price sits above the market median and the documentation standard accounts for it. Documentation practice rather than a single purity figure is the substance of this.

PFp.friskTL210/10 · 2025-08-14

Compared direct-supply material at 99.2% against an intermediary vial of nominally identical description at 99.2%. Offering the comparison without drawing a conclusion for anyone else. Catalogue availability corresponded to the published catalogue. I have no relationship with this supplier beyond having paid them.

NLne.laurentTL210/10 · 2026-04-23

The declared figure was not adjusted upward between the certificate and the commercial documentation. Small, and specifically worth checking for. No excipient present, cake intact rather than collapsed. I will update this post if a later lot changes the picture.

ACa.cardosoTL210/10 · 2025-04-23

They gave notice of a 2-day dispatch delay before the quoted window elapsed rather than after. Recording it because the sequence is the part that matters. Water content is reported by Karl Fischer with the method named.

HBh.bhattacharyaTL210/10 · 2026-04-03

Ordered oxytocin 10 mg from stock held in Poland. Quoted 6 days, delivered day 6, tracking accurate at every hop. Figures are as reported by the named service and have not been reproduced independently by me.

RMr.molnarTL210/10 · 2025-05-15

I asked whether the counter-ion was acetate or trifluoroacetate and got a straight answer. Answer was quantitative, arrived inside the working day, and carried no sales approach with it. Technical response inside four hours on a working day. Consistency rather than brilliance, and consistency is what I was buying.

HNh.nwosuTL210/10 · 2025-03-05

Weighed 11 units from a single consignment against declared fill. All within two per cent. Fill uniformity gets a fraction of the discussion purity gets and is the harder problem.

BJb.jansenTL210/10 · 2026-07-19

Twelve vials across two consignments, every flange sound, every cap crimped level. Packing that has clearly been designed rather than inherited from whatever was on the bench.

GVg.verhoevenTL210/10 · 2026-02-16

The secondary container arrived rigid with no movement inside it, and the cake in each vial was intact rather than shaken down the wall. That is a lyophilisation and a packing decision both showing up.

SHs.hartmannTL210/10 · 2026-04-22

10 orders across 9 months. No substitution, no reformulation, no line becoming unavailable after payment. Water content is reported by Karl Fischer with the method named.

FLf.laurentTL210/10 · 2026-06-06

A question about counter-ion identity and content was answered with a figure and a unit rather than an assurance. A residual-solvent screen was included without being requested. Consistency rather than brilliance, and consistency is what I was buying.

RMra.mensaTL210/10 · 2026-03-05

The related-substances table is itemised by individual impurity with retention times assigned, rather than reported as a single total. Technical response inside four hours on a working day. I will update this post if a later lot changes the picture.

TLt.lindqvistTL210/10 · 2026-03-24

Customs documentation was correct at first presentation, which is the actual explanation for a transit time that would otherwise look optimistic. Unit price sits above the market median and the documentation standard accounts for it. One member, one record, offered as such.

IRi.rasmussenTL210/10 · 2026-06-28

Requested a supplementary certificate for a lot released 18 months ago. It was produced from their records, which tells you the records exist.

KAk.agyemanTL210/10 · 2025-12-21

Been buying survodutide 10 mg here since before the catalogue expanded. The expansion has not cost the original lines anything measurable. The desiccant sachet was enclosed within the secondary container.

AHa.hartmannTL210/10 · 2025-06-27

First order was deliberately small. Documentation complete, transit as quoted, Janoshik returned 97.6%. Subsequent orders have not been small. No complaint arises from the orders described.

RMr.mwangiTL210/10 · 2026-06-18

Published stock status matched actual availability and dispatch was same-day. A residual-solvent screen was included without being requested. I will update this post if a later lot changes the picture.

Where GL Biochem sells

GL Biochem (Shanghai) Ltd. sells from its own storefront. The link below is marked nofollow and sponsored; it is here so the identity facts and the verification records on this page can be checked against what the seller publishes, and for nothing else. This site is paid nothing for it.

Visit GL Biochem at glbiochem.net →

Whatever a storefront claims, the lot on the vial has to match the lot on the certificate. That check is yours and nobody else can do it for you.

Sourcing topics worth reading alongside this record

General sourcing discussion, listed because it bears on how to read a page like this one. These topics are not about GL Biochem and nothing in them is a claim about this supplier.

TopicParticipantsRepliesViewsActivity
What a purity-only report leaves out
What a purity-only report leaves out — that is the question, and I have not found it answered plainly anywhere I have looked. Purity-only: setting out the arithmetic in full, because I have had to do it twice…
IBREDHBKEF+92 105 4k 8mo
Chain of custody for a sample you posted yourself — one year on
Posting this under the heading it deserves: Chain of custody for a sample you posted yourself — one year on Everything below is what sits behind that. Posting a small dataset on Chain of custody. It is mine,…
TVHFRVRDKF+28 32 50k 15h
A parcel stationary at a customs facility for nine days
On the subject in the title: A parcel stationary at a customs facility for nine days Working notes rather than a conclusion. A logistics question, since the answers here are usually better than anywhere else…
TVJSBSHMSL+64 72 51k 1mo
Second pass at: Submitting a sample: the process end to end
Second pass at: Submitting a sample: the process end to end Writing it up because I had to work it out twice and would rather nobody else did. Posting a small dataset on Submitting a sample. It is mine, it is…
MARAMAVDNA+12 16 41k 4mo
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ — does this still hold?
Asking directly, because I could not find a straight answer: How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ — does this still hold? A question about how a record should be read rather than…
EDKSVCDBS+24 28 8k 1mo
Coming back to: Payment method and the leverage it gives you, ranked
Payment method and the leverage it gives you, ranked — setting out what I have, and where I think it stops being reliable. A payments question, with the mechanics separated from the money. What I would like…
NRDWZVGLAP+21 26 43k 2d

Maintenance

Maintainers: KLindqvist, q.zhao_qa, impurity_table. Next review due 16 December 2026.

To add a record, file a structured report in vendor reports with the compound, lot, service, method and result. Reports missing any of those are moved to the discussion rather than the record. Allegations without documentation are hidden under R6 and the hiding is logged.

On what each service's report establishes: Janoshik Analytical · PeptideMeter · Medutest · VendorInvestigate