PEG Reagent Buyer’s Guide
To buy a PEG reagent, match the reactive groups and chain length to your experiment, then check the storage and pack sizes on the product page. Order listed sizes online. For larger quantities or a custom structure, request a quote; we reply within 24 hours. All PurePEG products are for research use only, and we do not provide GMP material.
Check that PurePEG fits your project
PurePEG supplies research use only (RUO) reagents.
A good fit
Discovery, method development and other laboratory research.
The wrong supplier
Projects that need GMP material, such as a raw material for clinical manufacturing. We do not provide it, so please confirm your grade requirements before you order.
Find the right product family
Start with what you want the reagent to do. If you already know the compound, search the site by CAS number, item number or keyword.
Attach PEG to a protein or other molecule from one reactive end
Start with
PEGylation reagents, including mPEG-OH
Read first
Join two different molecules or groups
Start with
Read first
Build step by step, as in peptide synthesis
Start with
Read first
Research antibody-drug conjugates
Start with
Read first
Read the product name
Our product names tell you what is at each end of the PEG chain. The letter n is the number of polyethylene glycol units.
mPEGn-X: An inert methoxy group at one end and a functional group X at the other
X-PEGn-X: The same functional group at both ends (homobifunctional)
X-PEGn-Y: A different functional group at each end (heterobifunctional)
PX-PEGn-X(Y): One functional group is protected, for example by Boc or Fmoc
Multi-arm PEGn: A non-linear PEG with more than one arm
Choose monodisperse or polydisperse
Monodisperse
A pure compound with an exact molecular weight and formula. Choose monodisperse when you need an exact structure.
Polydisperse
A polymer mixture described by an average molecular weight, such as 2K or 5K.
Our monodisperse PEG guide covers the differences, and we also carry polydisperse PEGs.
Decide how to buy
A listed product at a listed size
How to buy
Add it to your cart and check out, or send a purchase order by email or fax
What to expect
In-stock orders placed before 3:00 p.m. PST typically ship the same day
More than the largest listed size
How to buy
What to expect
Volume pricing is available for any quantity above the website listing, with a quote within 24 hours
A structure we don’t list
How to buy
What to expect
Milligram to kilogram scale, up to 20 kg per month, typically in 2 to 4 weeks, with a quote within 24 hours
A product that is out of stock
How to buy
What to expect
We will confirm the lead time for your order
Send a complete quote request
A complete request helps us give you an accurate quote the first time. Please include:
- The structure, CAS number or item number
- The quantity you need
- Your purity requirement
- The data you need, such as NMR, HPLC, CoA or MS
- Any packaging preferences
Plan for purchasing and receiving
Payment
We accept major credit cards, ACH, wire transfer and check. Standard terms are Net 30, and some international orders may require payment in advance.
Shipping costs
Prices are FOB San Diego, California. Freight, insurance, duty and special packaging charges are added to the invoice unless we arrange otherwise.
Carriers
FedEx is our usual carrier, and we can use your FedEx collect account.
Storage
Requirements vary by product, so check the product page before you order.
Returns
Contact us within 14 days of receipt. Returns need authorization, and custom products cannot be returned unless they are defective.
Full details
Our How to Order page has the full details.
Common questions
Do you provide GMP material?
No. PurePEG products are for research use only.
How fast will I get a quote?
Quotes are provided within 24 hours.
When does volume pricing start?
Volume pricing starts at any quantity above what the website lists for that product.
What purity can I expect from custom synthesis?
Custom products are usually 95% pure or higher. Tell us your requirement in your request, and we will confirm what is possible.
Can I get analytical data?
Yes. NMR, HPLC, CoA, MS and other data are available on request. Documents are not available for download, so please ask when you order or request a quote.
Request a quote
Tell us the product, quantity and purity you need. You can also email [email protected] or call 1-888-331-8188, Monday through Friday, 8:00 a.m. to 4:30 p.m. PST.