5-Bromuracil Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R22:Gesundheitssch?dlich beim Verschlucken.
R46:Kann vererbbare Sch?den verursachen.
S-S?tze Betriebsanweisung:
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
Beschreibung
5-bromouracil (5-BU) is a uracil derivative, and its 5' position of the pyrimidine ring is halogenated. If 5-BU is incorporated into DNA in place of thymine, the tautomeric shift will occur, and the 5-BU will base pair with guanine. After the replication, an A-T to G-C transition occurs. Furthermore, the presence of 5-BU within DNA increases the sensitivity of the molecule to UV light. 5-BU is structurally similar to thymine. Therefore, it is considered a thymine analog and base-pairs normally with adenine. It is rarely present in its enol form, where its base pairs with guanine. 5-Bromouracil treats neoplasms in the form of its nucleoside, 5-bromo-2-deoxy-uridine[1-2].
Chemische Eigenschaften
Prisms from H
2
O.
Verwenden
A major chemical mutagen. Incorporates into DNA, altering base-pair sequencing by replacing thymine
Definition
ChEBI: A pyrimidine having keto groups at the 2- and 4-positions and a bromo group at the 5-position.
Allgemeine Beschreibung
White powder.
Air & Water Reaktionen
Insoluble in water.
Reaktivit?t anzeigen
A halogenated amide. Organic amides/imides react with azo and diazo compounds to generate toxic gases. Flammable gases are formed by the reaction of organic amides/imides with strong reducing agents. Amides are very weak bases (weaker than water). Imides are less basic yet and in fact react with strong bases to form salts. That is, they can react as acids. Mixing amides with dehydrating agents such as P2O5 or SOCl2 generates the corresponding nitrile. The combustion of these compounds generates mixed oxides of nitrogen (NOx).
Hazard
Moderately toxic, alters DNA by replacing
thymine.
Health Hazard
ACUTE/CHRONIC HAZARDS: When heated to decomposition 5-Bromouracil emits very toxic fumes of bromide ion and NOx.
Brandgefahr
Flash point data for 5-Bromouracil are not available, but 5-Bromouracil is probably combustible.
Sicherheitsprofil
Moderately toxic by
intraperitoneal route. Experimental
reproductive effects. Mutation data
reported. When heated to decomposition it
emits very toxic fumes of Brand NOx.
5-Bromuracil Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
