5-bromo-5-nitro-1,3-Dioxane is an antimicrobial compound that is effective against Gram-positive and Gram-negative bacteria and fungi, including yeast.
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Cas No.: 30007-47-7
Sample solution is provided at 25 µL, 10mM.
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Background
5-bromo-5-nitro-1,3-Dioxane is an antimicrobial compound that is effective against Gram-positive and Gram-negative bacteria and fungi, including yeast. Its mode of action occurs via the oxidation of essential protein thiols causing inhibition of enzyme activity and subsequent inhibition of microbial growth. This compound has been used as a preservative for biological molecules and solutions such as antibodies and antisera.
Chemical Properties
Cas No. 30007-47-7 SDF Synonyms Bronidox Canonical SMILES BrC1([N+]([O-])=O)COCOC1 FormulaC4H6BrNO4 M.Wt212 Solubility DMF: 30 mg/ml,DMSO: 30 mg/ml,DMSO:PBS(pH 7.2) (1:4): 0.2 mg/ml,Ethanol: 25 mg/ml Storage Store at -20°C General tips Please select the appropriate solvent to prepare the stock solution according to the solubility of the product in different solvents; once the solution is prepared, please store it in separate packages to avoid product failure caused by repeated freezing and thawing.Storage method and period of the stock solution: When stored at -80°C, please use it within 6 months; when stored at -20°C, please use it within 1 month. To increase solubility, heat the tube to 37°C and then oscillate in an ultrasonic bath for some time. Shipping Condition Evaluation sample solution: shipped with blue ice. All other sizes available: with RT, or with Blue Ice upon request.
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In vivo Formulation Calculator (Clear solution)
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Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )
Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O, mix and clarify.
Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.
Note: 1. Please make sure the liquid is clear before adding the next solvent. 2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such as vortex, ultrasound or hot water bath can be used to aid dissolving. 3. All of the above co-solvents are available for purchase on the GlpBio website.
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Research Update
Mode of action of the antimicrobial compound 5-bromo-5-nitro-1,3-Dioxane (bronidox) is a bromine-containing preservative often used in rinse-off cosmetics but also subjected to several restrictions according to the European Cosmetic Products Regulation. Thus, as a part of a quality control procedure, analytical methods for the determination of this compound in different types of cosmetics are required. In the present work, a solvent-free and simple methodology based on solid-phase microextraction (SPME) followed by gas chromatography with microelectron capture detection (GC-μECD) has been developed and validated for the determination of bronidox in cosmetic samples such as shampoos, body cleansers or facial exfoliants. As far as we know, this is the first application of SPME to this preservative. Negative matrix effects due to the complexity of the studied samples were reduced by dilution with ultrapure water. The influence of several factors on the SPME procedure such as fiber coating, extraction temperature, salt addition (NaCl) and sampling mode has been assessed by performing a 2(4)-factorial design. After optimization, the recommended procedure was established as follows: direct solid-phase microextraction (DSPME), using a PDMS/DVB coating, of 10 mL of diluted cosmetic with 20% NaCl, at room temperature, under stirring for 30 min. Using these suggested extraction conditions, linear calibration could be achieved, with limits of detection (LOD) and quantification (LOQ) well below the maximum authorized concentration (0.1%) established by the European legislation. Relative standard deviations (RSD) lower than 10% were obtained for both within a day and among days precision. The method was applied to diverse types of formulations spiked with bronidox at different concentration levels (0.008-0.10%); these samples were quantified by external calibration and satisfactory recoveries (≥ 70%) were obtained in all cases. Finally, the SPME-GC-μECD methodology was applied to the analysis of several cosmetics labeled or not as containing bronidox. The presence of this preservative in some of these samples was confirmed by GC-MS.