1,3-Dibromo-5,5-dimethylhydantoin
1,3-Dibromo-5,5-dimethylhydantoin structure
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Common Name | 1,3-Dibromo-5,5-dimethylhydantoin | ||
|---|---|---|---|---|
| CAS Number | 77-48-5 | Molecular Weight | 285.921 | |
| Density | 2.2±0.1 g/cm3 | Boiling Point | 250.2±23.0 °C at 760 mmHg | |
| Molecular Formula | C5H6Br2N2O2 | Melting Point | 197-199 °C (dec.)(lit.) | |
| MSDS | Chinese USA | Flash Point | 105.1±22.6 °C | |
| Symbol |
GHS03, GHS05, GHS06, GHS09 |
Signal Word | Danger | |
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Determination of selenium sulfide using 1,3-dibromo-5,5-dimethylhydantoin (DBH). Analytical methods of pharmacopeias with DBH in respect to environmental and economical concern Part 11.
J. Pharm. Biomed. Anal. 28(2) , 337-43, (2002) USP 2000 (The United States Pharmacopeia, Rockville, MD, 24th ed., 2000, pp. 1514-1515) and PH. EUR. 1997 (European Pharmacopoeia, 3rd ed., Council of Europe, Strasbourg, 1997, p. 1459) dissolve selenium sulfide by boiling with fuming nitric acid for about 1 ... |
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Titrimetric determination of acetylenic hyponotics using organic brominating agents.
Pharm. Weekbl. Sci. 10(2) , 90-2, (1988) A titrimetric method is described for the determination of three acetylenic hypnotics, namely ethchlorvynol, ethinamate, and methylpentynol carbamate, in bulk and in dosage forms. The method involves the use of either 1,3-dibromo-5,5-dimethylhydantoin (DBH), ... |
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Determination of iron limiting values according to PH. EUR. using 1,3-dibromo-5,5-dimethylhydantoin (DBH) instead of elemental bromine. Analytical methods of pharmacopoeias with DBH in respect to environmental and economical concern. Part 8.
Pharmazie 57(1) , 45-8, (2002) PH. EUR. 2002 uses elemental bromine performing iron limit tests for maleic acid (iron 5 ppm) and titanium dioxide (iron 200 ppm). 1,3-Dibromo-5,5-dimethylhydantoin (DBH) can replace bromine water. For the iron limit test of maleic acid bivalent iron is oxidi... |
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Determination of iodine values using 1,3-dibromo-5,5-dimethylhydantoin (DBH) without the employment of chlorinated hydrocarbons. Analytical methods of pharmacopoeias with DBH in respect to environmental and economical concern. Part 17.
Pharmazie 57(8) , 538-42, (2002) Low and medium iodine values of fixed oils and fats can be determined in glacial acetic acid within reduced waiting times of only 5 min. Highly unsaturated compounds such as those of linseed oil, cod-liver oil, sunflower oil, soybean oil, wheat germ oil and t... |
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Replacement of cyanogen bromide solution PH. EUR. with 1,3-dibromo-5,5-dimethylhydantoin (DBH). Analytical methods of pharmacopoeias with DBH in respect to environmental and economical concern, Part 13.
Pharmazie 57(4) , 250-1, (2002) PH. EUR. 2002 identifies nicotinamid, nicotinic acid, and nikethamide according the reaction of König using cyanogen bromide solution prepared with bromine water and ammonium thiocyanate immediately before use. This colour reaction can be better performed wit... |
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Cetylpyridinium tetrachlorozincate as standard for tenside titration. Analytical methods with 1,3-dibromo-5,5-dimethylhydantoin (DBH) in respect to environmental and economical concern, part 19.
Pharmazie 59(8) , 615-7, (2004) The determination of the cationic active disinfectants benzalkonium chloride, benzethonium chloride, cetrimide, and cetylpyridinium chloride according to PH. EUR. 2002 resp. supplement 4.3/2003 can be improved using the DBH-method. By application of column ex... |
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Determination of iodine values using 1,3-dibromo-5,5-dimethylhydantoin (DBH) and ethyl acetate as solvent. Analytical methods with DBH in respect to environmental and economical concern, part 18.
Pharmazie 59(8) , 612-4, (2004) Iodine values (iodine numbers) of several fixed oils and lard can be determined in ethyl acetate, an easily biodegredable solvent, instead of chloroform according to PH. EUR. 2002. Iodine monobromide has been replaced by 1,3-dibromo-5,5-dimethylhydantoin (DBH... |
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1,3-Dibromo-5,5-dimethylhydantoin (DBH) as oxidant and precipitant for drug identification according to PH. EUR Analytical methods of pharmacopoeias with DBH in respect of environmental and economical concern, Part 15(1).
Pharmazie 57(6) , 393-5, (2002) Elemental bromine serves as oxidant for the identification of propylthiouracil, 2-thiouracil and sulphur according to PH. EUR. 2002. Phenol is identified according to PH. EUR. 2002 with bromine water as the sparingly water-soluble 2,4,4,6-tetrabromo-2,5-cyclo... |
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Determination of organically bound iodine by reductive mineralization with aluminium powder. Analytical methods of pharmacopoeias with DBH in respect to environmental and economical concern. Part 16.
Pharmazie 57(7) , 471-3, (2002) PH. EUR. 2002, JAP 1996 and USP 2000 mineralize organically bound iodine in x-ray contrast media by boiling under reflux with zinc powder in alkaline solution. The reductive mineralization can be performed at room temperature without filtration, when aluminiu... |
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Organocatalysis as a safe practical method for the stereospecific dibromination of unsaturated compounds.
Org. Lett. 14(7) , 1858-61, (2012) Organocatalytic stereospecific dibromination of a wide variety of functionalized alkenes was achieved using a stable, inexpensive halogen source, 1,3-dibromo 5,5-dimethylhydantoin, and a simple thiourea catalyst at room temperature. The presence of a tertiary... |