CAS RN: 77-48-5 | Product Number: D1265
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|Purity / Analysis Method||>97.0%(T)|
|Molecular Formula / Molecular Weight||C__5H__6Br__2N__2O__2 = 285.92|
|Physical State (20 deg.C)||Solid|
|Store Under Inert Gas||Store under inert gas|
|Condition to Avoid||Moisture Sensitive|
|Reaxys Registry Number||146024|
|PubChem Substance ID||87567800|
|SDBS (AIST Spectral DB)||4013|
|Merck Index (14)||3017|
|Appearance||White to Light red to Green powder to crystal|
|Purity(Iodometric Titration)||min. 97.0 %|
|Solubility in hot Toluene||almost transparency|
|Melting Point||193 °C|
|Boiling Point||376 °C|
|Solubility (soluble in)||Chloroform,Ethanol|
|Hazard Statements||H301 : Toxic if swallowed.
H314 : Causes severe skin burns and eye damage.
H410 : Very toxic to aquatic life with long lasting effects.
|Precautionary Statements||P273 : Avoid release to the environment.
P260 : Do not breathe dust or mist.
P220 : Keep away from clothing and other combustible materials.
P210 : Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P280 : Wear protective gloves/ protective clothing/ eye protection/ face protection.
P370 + P378 : In case of fire: Use dry sand, dry chemical or alcohol-resistant foam to extinguish.
P391 : Collect spillage.
P303 + P361 + P353 : IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water.
P301 + P310 + P330 : IF SWALLOWED: Immediately call a POISON CENTER/doctor. Rinse mouth.
P304 + P340 + P310 : IF INHALED: Remove person to fresh air and keep comfortable for breathing. Immediately call a POISON CENTER/doctor.
P305 + P351 + P338 + P310 : IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER/doctor.
|Class||5.1 / 6.1|
DBDMH (0.50–0.53 eq.) is added in part into the solution of starting material in CHCl3 (5–7 mL / mmol) at room temperature. Upon addition of the DBDMH, the solution becomes red or deep brown colored, the next portion of DBDMH is added after the disappearance of color and so on. The progress of the reaction is monitored by GC-MS. After completion of the reaction, removal of the solvent followed by the separation of the solid byproduct (derived from DBDMH) by simple filtration provides the almost pure bromide. 10% Aqueous sodium hydrosulfite solution is added into the reaction mixture, stirred for 5 min. Organic layer is separated, dried over MgSO4 and concentrated in evaporator yields the almost pure product. Passing through a small chromatographic column, it gives the pure products.
- 1,3-Dibromo-5,5-dimethylhydantoin, a useful reagent for ortho-monobromination of phenols and polyphenols
- A. Alam, Y. Takaguchi, S. Tsuboi, J. Fac. Environ. Sci. Tech., Okayama Univ. 2005, 10, 105.
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