Home Cart Sign in  
HazMat Fee +

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 USD 200+
Chemical Structure| 81777-40-4 Chemical Structure| 81777-40-4

Structure of 81777-40-4

Chemical Structure| 81777-40-4

*Storage: {[sel_prStorage]}

*Shipping: {[sel_prShipping]}

,{[proInfo.pro_purity]}

4.5 *For Research Use Only !

{[proInfo.pro_purity]}
Cat. No.: {[proInfo.prAm]} Purity: {[proInfo.pro_purity]}

Change View

Size Price VIP Price

US Stock

Global Stock

In Stock
{[ item.pr_size ]} Inquiry {[ getRatePrice(item.pr_usd,item.pr_rate,item.mem_rate,item.pr_is_large_size_no_price, item.vip_usd) ]}

US Stock: ship in 0-1 business day
Global Stock: ship in 5-7 days

  • {[ item.pr_size ]}

In Stock

- +

Please Login or Create an Account to: See VIP prices and availability

US Stock: ship in 0-1 business day
Global Stock: ship in 2 weeks

  • 1-2 Day Shipping
  • High Quality
  • Technical Support
Product Citations

Alternative Products

Product Details of [ 81777-40-4 ]

CAS No. :81777-40-4
Formula : C5H9BrO3
M.W : 197.03
SMILES Code : O=C(OCCOCBr)C
MDL No. :MFCD03411325

Safety of [ 81777-40-4 ]

GHS Pictogram:
Signal Word:Danger
Hazard Statements:H301-H311-H331-H341
Precautionary Statements:P201-P202-P261-P264-P270-P271-P280-P302+P352-P304+P340-P308+P313-P310-P330-P361-P403+P233-P405-P501
Class:6.1
UN#:2810
Packing Group:

Application In Synthesis of [ 81777-40-4 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 81777-40-4 ]

[ 81777-40-4 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 61160-18-7 ]
  • [ 81777-40-4 ]
  • [ 875541-87-0 ]
YieldReaction ConditionsOperation in experiment
Synthesis of iron chelator-nanoparticle systems: The general synthesis of the chelator 1 is described in scheme 3.86 Scheme 3. R=Me, Et. a: benzylchloride/NaOH/. b: NH4OH. C: hexamethyldisilazane/chlorotrimethylsilane/(2-acetoxyethoxy)methyl bromide, trimethylsilyl trifluoromethanesulfonate in 1,2-dichloroethane. c: basic hydrolysis with NH4OH. d: tosyl chloride in pyridine. e: nanoparticles with amino functional groups. f: BBr3/CH2Cl2 at 4° C. for 30 min. Instead of benzyloxyethoxymethylchloride, 2-acetoxyethoxy)methyl bromide is used and the synthetic method is the same as described herein. The acetyl protection group on the side chain is removed by basic hydrolysis in methanolic ammonia solution. The mixture is stirred at room temperature in a sealed flask for 24 h. After purification by silica gel chromatography using CHCl3-MeOH (8:1) as an eluent, the deprotected hydroxyl group is converted into P-toluene-sulphonyl (tosyl) ester by the reaction with tosyl chloride (1.1 moles per mole of chelator) in dry pyridine. After removal of the solvent, the crude ester is often used directly. Before conjugation, 1 mL (100 mg/mL) of amino-modified nanoparticles are washed in 10 mL of 0.1 M sodium phosphate buffer (pH 7.4). After second wash, resuspend pellet in 10 mL of tosyl activeted chelator solution, ensuring that the particles are completely suspended by vortexing. Allow to react at 37° C. for 24 hours with continuous mixing. Separate the particles conjugated with chelators by centrifugation and wash with phosphate buffered saline (pH 7.4) four times. Then, deprotect OH on pyridinone ring by BBr3 in CH2Cl2 at 4° C. with shaking for 30 min. The new chelator-particle system is obtained by centrifugation and wash four times with PBS buffer. Resuspend in 10 mL 25 mM Tris buffer (pH 7.4) and store at 4° C. until used. As mentioned above, if the nanoparticles could be damaged during the deprotective step, we will use an altered method to conjugate the chelator. The toluene sulfonic group (Tosyl-O-group) may be changed into an amino group by nucleophilic displacement reaction. To obtain primary amines in reasonable yield, sufficient excess ammonia is used. After that, first, deprotection of the OH group on the pyridinone ring by using the same deprotective method as above, then conjugate the chelator to Sulfo-NHS(N-hydroxysulfosuccinimide) preactivited carboxylic acid functinal nanoparticles just like chelators 2, 3, and DFO do. The chelator concentrations of the reaction solution before and after conjugation are determined by using UV-visible spectroscopy or HPLC, thereby the amount of the chelator conjugated to nanoparticles can be obtained by simply multiplying the difference of the concentrations with the reaction volume.
 

Historical Records

Technical Information

Categories