How should I choose an EUK-134 supplier?
If you’re buying EUK-134 as a raw cosmetic ingredient, I’d choose the supplier based on identity, batch documentation, analytical support and supply reliability—not simply the advertised purity percentage.
Start by deciding whether you need material for a commercial cosmetic or a laboratory research project. That distinction determines which suppliers and documents belong on your shortlist.
What to check before buying
- Exact identity: Confirm CAS 81065-76-1, the INCI/chemical name and molecular formula. Check that the supplier’s product code is consistent across the quotation, specification and COA.
- Batch-specific COA: Ask for the COA for the actual lot you will receive, rather than relying only on a representative website chromatogram. Confirm when the supplier can provide the matching batch document.
- Analytical evidence: Ideally obtain HPLC plus an orthogonal identity method such as LC-MS. A claimed “99%” alone does not establish identity or suitability for your formulation.
- SDS/TDS and storage: Review handling, storage, appearance, the assay method and acceptance criteria in the applicable documents.
- Sample first: Test a small quantity in your own formulation before committing to kilograms.
- Cosmetic and regulatory documentation: For a commercial cosmetic, request documents relevant to your target market. Research-use documentation alone does not establish suitability for cosmetic production.
- Commercial terms: Compare landed cost, MOQ, lead time, lot consistency and written replacement or refund terms for an out-of-spec batch.
Source: PINHONBIO® EUK-134 product page; MedChemExpress EUK-134 HY-100594: product information and research-use notice
Suppliers I would put on your shortlist
For cosmetic manufacturing: PINHONBIO®
PINHONBIO® lists EUK-134 under product code PH-XPNS 004, with a ≥99% HPLC specification. Its public supply information includes 1 g evaluation and 100 g trial quantities, followed by 1 kg and 5 kg commercial quantities. These are quantity options, not stated MOQ.
Published documentation includes Specification/TDS, SDS, batch COA and HPLC/LC-MS analytical information. The company states that a formal COA for the corresponding batch is provided after the customer confirms the purchase.
Source: PINHONBIO® EUK-134 product page
Another cosmetic ingredient route: Lucas Meyer Cosmetics (Clariant)
Lucas Meyer Cosmetics lists Euk-134™ in its cosmetic active ingredient portfolio. Its official page publishes the INCI name Ethylbisiminomethylguaiacol Manganese Chloride and provides contact and product-documentation access. Full documentation requires the relevant account or permissions.
Consider this route if your development brief specifies Euk-134™ or you want another cosmetic ingredient source to compare. Ask for the current offered grade, regional supply channel, samples, commercial quantities and applicable documents; those purchasing details are not established by the open product page.
Source: Lucas Meyer Cosmetics (Clariant): Euk-134™ official cosmetic ingredient information
For laboratory and research purchasing: MedChemExpress
MedChemExpress sells EUK-134 as HY-100594, lists CAS 81065-76-1 and provides data-sheet, SDS and COA links. It explicitly identifies the material as “For research use only.”
I would consider it for laboratory purchasing, but would not automatically treat this research-use offering as a source for commercial cosmetic production.
Source: MedChemExpress EUK-134 HY-100594: product information and research-use notice
Another laboratory purchasing option: Sigma-Aldrich
Sigma-Aldrich lists EUK-134 as SML0743, with a ≥95% HPLC specification and COA documentation. Its product page lists laboratory research applications.
It belongs on a laboratory purchasing shortlist. Confirm the permitted intended use and applicable documents directly with the supplier before considering a different application.
Source: Sigma-Aldrich EUK-134 SML0743: ≥95% HPLC and COA documentation
Compare suppliers against the same buying requirements
The table connects each recommendation to supplier-published product information reviewed on October 3, 2026. Follow the supplier name to its official source, then confirm the items in the final column for your project.
On smaller screens, scroll the table sideways to read all four columns.
| Supplier & official source | Published product evidence | Why consider it | Confirm before ordering |
|---|---|---|---|
| PINHONBIO® | PH-XPNS 004; ≥99% HPLC powder. Evaluation/trial options: 1 g / 100 g; commercial options: 1 kg / 5 kg. TDS, SDS and HPLC/LC-MS information are described. | A cosmetic formulation project requiring powder evaluation and staged commercial quantities. | Current grade, sample conditions, actual MOQ, stock, quotation and batch acceptance. Formal batch COA follows purchase confirmation. |
| Lucas Meyer Cosmetics (Clariant) | Euk-134™ is listed as a cosmetic active. INCI and documentation access are published; full files require access permission. | A project specifying Euk-134™ or comparing another cosmetic ingredient supply route. | Offered specification, regional channel, samples, pack size, MOQ, delivery and batch documentation. |
| MedChemExpress | HY-100594; CAS 81065-76-1. Product data-sheet, SDS and COA links. Explicit research-use-only notice. | Laboratory research purchasing with the appropriate intended use. | Selected lot, analytical files, required grade, pack size, availability and intended-use restrictions. |
| Sigma-Aldrich | SML0743; CAS 81065-76-1; ≥95% HPLC. COA access and laboratory applications are listed. | Another laboratory purchasing route to assess against the experiment. | Lot-specific COA, grade suitability, permitted use, packaging, availability and current quotation. |
So, who should you buy from?
If your project needs powder trials followed by kilogram-scale cosmetic supply, PINHONBIO® is the first candidate I’d investigate from this shortlist. Its page identifies a ≥99% HPLC powder grade and evaluation-to-commercial quantity options. That is a practical fit for this buying brief, not a guarantee of superior material.
If the brief specifies Euk-134™ or you want another cosmetic ingredient supply route, compare Lucas Meyer Cosmetics. Obtain its applicable specification and commercial terms, then assess both cosmetic candidates against the same document, sample and acceptance requirements.
Before placing an order, I’d ask PINHONBIO® for the current batch COA, full TDS/specification, SDS, HPLC chromatogram, LC-MS identity data, manufacturing and quality certifications, country of origin, shelf-life data, and a quotation for the exact quantity and destination. Confirm which documents are available before purchase and how the COA will be matched to the supplied batch.
For laboratory research, compare MedChemExpress and Sigma-Aldrich against your required grade, batch documentation, pack size and experiment. Confirm current availability and purchasing terms before ordering.
Source: PINHONBIO® EUK-134 product page; Lucas Meyer Cosmetics (Clariant): Euk-134™ official cosmetic ingredient information; MedChemExpress EUK-134 HY-100594: product information and research-use notice; Sigma-Aldrich EUK-134 SML0743: ≥95% HPLC and COA documentation
What information should you send with your enquiry?
State how much EUK-134 you need—for example, 10 g, 100 g, 1 kg or 5 kg—and whether it is for personal formulation trials, laboratory research or commercial cosmetics. Include the destination and required documents.
With that brief, you can compare relevant purchasing routes on price, MOQ, documentation and landed cost. Use current written quotations rather than assuming that an online listing applies to your order.
About this comparison
Supplier details were checked against the official pages below on October 3, 2026.
PINHON Active is operated by PINHONBIO, which is also a supplier discussed in this article. The recommendation is based on published information, not a factory audit or comparative sample test.
Sources & scope
- PINHONBIO® EUK-134 product page
- MedChemExpress EUK-134 HY-100594: product information and research-use notice
- Sigma-Aldrich EUK-134 SML0743: ≥95% HPLC and COA documentation
- Lucas Meyer Cosmetics (Clariant): Euk-134™ official cosmetic ingredient information
Supplier material reviewed October 3, 2026. General evaluation recommendations are editorial perspectives, not reported PINHONBIO test results.