Sunday, August 9, 2020

Laysan is pronounced, "LI-"sän" and it is an albatross that is found in the islands of the Pacific Ocean. It is a large, rare bird that is known to be graceful and impressive in flight.

Our Mission
We are dedicated to building a long term relationship with our customers by offering quality PEG reagents backed up with exceptional customer service and technical support.

Laysan Bio Products






Dear Customer,

Laysan Bio is a dedicated supplier and we are taking this opportunity to reassure you that Laysan is taking every precaution and has policies in place to limit the risk of the Covid 19 virus in our workplace.

Laysan Bio is working with our vendors to ensure our supply chain is stable by staying in contact with them to make sure that critical raw materials and supplies needed for manufacturing are in stock and to make sure that lead times do not become a problem.

Thank you for your continued support of Laysan Bio if we can help you in any way please do not hesitate to contact us.


Thank you for your interest in the reagents from Laysan Bio, Inc.  Below is a list of sale items followed by a list of the categories for the reagents that we offer.  To find out more information about using our reagents, please go to our FAQ page.  Click here to download a printable order form.

MONTHLY WEB SALE FOR July:  You must enter the code in the Comments section of the order form online.  You can also send your order through email, by phone, or fax and use this code for a discount.  This code will expire on July 30th.  One code per line item.  Please check back monthly for new product discounts each month.

WS0720-20% (20% discount)     



4 arm PEG-EPOX-20K               



If you do not see a reagent that will fit your needs, please contact us to receive a custom quotation. If you need a quote for quantities larger than 50 grams, please contact us for bulk pricing. 

Don't know which PEG to use?  Laysan offers research kits to help reduce the cost and time determining which functional group and MW is appropriate for your application. The kits consist of multiple functional groups that will react with a specific targeted end group or with multiple MWs of a single functional group.  Individual kit information is available on our kit page.

We offer smaller bottling requests for a fee of $50 and then $5 per bottle.  Due to the accuracy of our scales, we are not able to bottle lower than 100 mg quantities. 

***We have listed several custom reagents that are frequently in stock.  Please contact us for availability on all reagents.

PLACING ORDERS:  You can use the link within the shopping cart to place an order or you can complete the order form and send it by email ( or fax (256-586-9007).  Please contact us at or by phone at 888-852-9726 or 256-586-9004 with any questions prior to placing your order.  If you need to ask a technical question about one of our reagents, please contact us at  


Pegylation Research Kits

Acrylates (ACRL)

Aldehydes (bALD and pALD)

Amines (NH2)

Biotins (BIO)

Carboxymethyl (COOH)

Epoxides (EPOX)

Esters (SC, SCM, SG, SS, SVA)

Hydrazides (HZ)

Hydroxyls (OH)

Maleimides (MAL)

Multi-Arm (4 arm PEG reagents)

Nitrophenyl Carbonates (NPC)

Orthopyridyl Disulfides (OPSS)

Phospholipid (DSPE)

Protected PEGs (FMOC and tBOC)

Silanes (SIL)

Thiols (SH)

Valeric Acid (VA)

All sales are subject to Laysan Bio's Terms and Conditions of Sale.  Please click here to view the Terms and Conditions.  Because of the broad range of uses for PEG reagents, Laysan Bio can not guarantee that the reagent(s) will work for each customer's specific use.  If you have questions we encourage you to contact us prior to ordering the reagent(s). 

All products are shipped overnight or international priority for the stability of the product(s).

International Customers:  If a VAT# or broker information is not included at the time of an international order, a delay may occur. An email address is required so a tracking number can be sent.  The customer is responsible for contacting FedEx if a delay occurs. Laysan is not responsible for deliveries delayed due to international customs issues or weather. Thank you for your cooperation.

Click here to find a listing of our MSDS documents.  Click here to find a listing of our SDS documents.


Laysan Bio has a Quality System and manufactures cGMP compliant “Bulk Pharmaceutical Chemical” reagents.  We welcome all discussions regarding this service and will work with you to help our products fit your project requirements.  If you are not sure if you need compliant-grade or research-grade material, click here for more information.  We have a list of compliant-grade reagents that are currently in stock on the, "Compliant Products In Stock" page.  Call today to request a quotation or to schedule a conference call.


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