There will be a HazMat fee per item when shipping a dangerous goods. The HazMat fee will be charged to your UPS/DHL/FedEx collect account or added to the invoice unless the package is shipped via Ground service. Ship by air in Excepted Quantity (each bottle), which is up to 1g/1mL for class 6.1 packing group I or II, and up to 25g/25ml for all other HazMat items.
Type
HazMat fee for 500 gram (Estimated)
Excepted Quantity
USD 0.00
Limited Quantity
USD 15-60
Inaccessible (Haz class 6.1), Domestic
USD 80+
Inaccessible (Haz class 6.1), International
USD 150+
Accessible (Haz class 3, 4, 5 or 8), Domestic
USD 100+
Accessible (Haz class 3, 4, 5 or 8), International
NSC 8751 (Synonyms: (E)-2-Butenoic acid; (E)-Crotonic acid; trans-2-Butenoic acid; trans-Crotonic acid) is an endogenous metabolite. Strong herbicidal properties of crotonic acid and its availability after release to soil combined with its high level in seeds suggest that it might be considered as an allelopathic and autotoxic factor in the seeds[1]. Hydrophilic polymers are obtained via graft copolymerization of PU with acrylic acid (AA) and crotonic acid (CA). The membranes are prepared by solvent-casting method and characterized by FTIR spectra and SEM analysis. The diffusion measurements are performed using a diffusion cell during 10 h at 37 degrees C. Permeability coefficients calculated from diffusion experiments are found to be approximately three times higher in hydrophilic membrane than hydrophobic PU membrane. The adherence of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) onto the membranes at 37 degrees C, the microorganisms didn't adhere onto the membranes compared by control suspension[2]. A Gram-positive spore former (Bacillus megaterium) was distinguished by an abundant peak for crotonic acid evident in positive and negative ions and not observed with M. luteus[3].
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