Transportation condition: In normal condition, room temperature Recommended shipping method: By air, by sea or by express Storage condition: Keep in dark and dry place, sealed well, room temperature Shelf Life: Two years Minimum Order Qty: Negotiation Certification: COA, HPLC, GC, HNMR, Assay, Water Content(K.F), TLC availableThey are often used for packing powder. It depends on customers` requirement. Therefore, tell us your demanding before packing if you have special requests.1kg to 25kg The outer packing is hard. And it is difficult to cut and damage. It can protect your products perfectly.1. R&D service available 2. ISO certified manufacturer, quality guarantee 3.A full course of follow-up service during production 4.High cost effective 5.Quality certification documents provided per customer's request 6.Great after-sales service, maintaining close relationship with customer 7.Full resource to help decrease shipping costs 8.Free sample offered to check out quality prior to any payment 9.Payment term negotiated 10.Assit customers deal with affairs in ChinaL-Tryptophan Trytophan (W) Solution, 100ppm L-Tryptophan, Trp L-Tryptophan Vetec(TM) reagent grade, >=98% VWR SURFACE SAMPLING SPONGE WITH NE L-TRYPTOPHAN (13C11,D8,15N2) L-Tryptophan(pharm grade) L-Trp-OH L-Tryptophan, Animal-Free