Q: How do I place an order?
A: You can place an order on our products page at www.advancedbiochemicals.com by adding the items into the shopping cart. You can also fax your order to us at +1-509-696-4035 or email orders to firstname.lastname@example.org. You can also submit the order form or send us the ordering information including item information, shipping & billing address, contact phone number, e-mail address, payment information such as PO number or credit card information. We accept VISA, Mastercard, Discover and American Express. Please contact us at E-mail: email@example.com or Phone: +1-678-827-9993 or Fax: +1-509-696-4035 with any questions.
Q: How does Advanced BioChemicals ship the products?
A: Shipping starts the same day for orders placed Monday to Thursday by 3:00 p.m. ET. Order placed Monday to Thursday after 3:00pm will be shipped out at the second day. For orders placed on a weekend or holiday, shipping starts the next business day. All of our products are shipped at room temperature for overnight delivery in United States. International shipments should take 3-5 days depending on the continent and it typically takes three days to deliver to destinations in European countries. Our choice of carrier is FedEx. Shipping cost will be prepaid and added to invoice unless the customer provides a valid FedEx or UPS account number.
Q: What are the storage conditions for the products?
A: Our products could be sensitive to temperature, light or moisture. They should be stored in a freezer of -15°C or colder immediately upon arrival. Our products are in dry powder form except those having very low molecular weight. Vials should be kept away from light particularly UV light. Before vials can be opened, please allow vials and products to equilibrate to room temperature to avoid absorbing moisture. For long-term storage, we recommend that our products are stored as a dry powder form and not in any type of solutions. If you have to store products in a solution, be sure that the solvent is degassed and dried.
Q: What procedure does Advanced BioChemicals recommend to aliquot/rebottle the products?
A: If your reagent requires rebottling please follow these steps:
- Allow vials and products to thaw and equilibrate to room temperature;
- Glove box or any other dry packaging areas with access to inert gas (e.g. argon or nitrogen) should be used to aliquot and rebottle;
- Open vials and quickly repackage;
- Flush all vials with inert gas – caution: adjust gas flow so that dry powders will not be blown away;
- Tightly cap all vials and wrap with parafilm;
- Store at or below -15°C.
Q: What is the difference between homobifunctional PEG and heterobifunctional PEG?
A: Both Homobifunctional PEG and Heterbifunctional PEG are with a linear structure. But Homobifunctional PEG with a general formula X-PEG-X has the same functional group (X) at both terminals side; while Heterobifunctional PEG (X-PEG-Y) derivatives have two different functional groups (X and Y).
Q: How is PEGs solubility?
A: PEGs in all molecular weights are soluble in water and aqueous buffer solutions typically with solubility up to several hundred milligrams per milliliter (mg/mL). PEGs are readily soluble in dichloromethane, chloroform, acetonitrile and water at room temperature. PEGs require heat to be soluble in toluene, methanol, ethanol, and isopropanol. PEGs are not soluble in ethers, ethylene glycol, hexane, and are not soluble in most alcohols at room temperature.
Q: What is mPEG?
A: mPEG refers to methoxylpolyethylene glycol or polyethylene glycol monomethyl ether. mPEG derivatives refer to monofunctional linear PEG derivatives with a general formula of mPEG-X that has an inert methoxyl cap at one end and a functional group X at the other end of the PEG polymer chain.
Q: What types of multi-arm PEG do you offer?
A: We offer 2-arm, 3-arm (Y-Shaped), 4-arm and 8-arm PEG derivatives. The molecular weight (MW) of our multi-arm PEG products refers to the molecular weight of the entire molecule, and the molecule weight of each arm can be calculated by dividing the indicated MW by the indicated number of arms.
Q: Where can I get the copy of MSDS or COA file?
A: COA and MSDS should be shipped together with your order. However if you cannot find the MSDS, COA or storage instructions in the package you received, please contact us at firstname.lastname@example.org to submit a request.
Q: I need a special PEG or Porphyrin reagent that cannot be found in your online catalog. Can you custom synthesize it?
A: We do provide custom synthesis service for PEG and Porphyrin with a variety of functional groups and a broad range of molecular weights. Please visit the Custom Synthesis Service page to learn more and contact us at email@example.com to ask for a quote.