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Description
TCI D5685 1,4-Diaminobutane Dihydrobromide is the dihydrobromide salt of 1,4-diaminobutane, a straight-chain four-carbon diamine also widely known as putrescine. The material is classified as a non-heterocyclic building block, and its role in the laboratory is to supply two primary amine groups separated by a four-carbon spacer. That arrangement is particularly useful for linking two molecular fragments together or for closing large rings, which is why the compound appears so often in synthetic and bioconjugation work where a defined, flexible tether between reactive sites is required.
The properties that make this form a preferred choice begin with its physical state: converting the parent amine, normally a liquid with a strong odour, into a crystalline solid makes it far easier to weigh, store, and transfer inside the laboratory. The bromide salt offers high storage stability and is not volatile, while dissolving well in aqueous media, so it is ready for preparing stock solutions in biochemical experiments. Because the amine groups are protected as a salt, the material does not readily absorb carbon dioxide from the air the way a free amine does, and the reactive amine can be liberated again at any time by adding base. The presence of bromide ions also makes it an interesting additive in materials research, particularly as a diammonium component.
In Indonesian laboratories, this salt form is well suited to everyday working conditions, where warm and humid air tends to shorten the useful life of free amines and complicate accurate weighing. A stable crystalline powder can be handled on an open balance, dispensed in small portions, and kept in storage between experiments without the odour and handling difficulties associated with the liquid diamine. It is typically used in university research groups, synthesis laboratories, and materials research facilities that prepare aqueous stock solutions for repeated use.
Laboratory Applications
- Bifunctional linker synthesis: the two primary amines separated by four carbons allow two molecular fragments to be joined through a defined, flexible spacer of predictable length.
- Macrocyclisation and large-ring formation: the four-carbon chain provides the spacing needed to close large rings, making the diamine a practical starting point for macrocyclic frameworks.
- Biochemical stock solution preparation: good solubility in aqueous media and non-volatile salt form let researchers prepare and store putrescine-based aqueous stock solutions reliably for repeated experimental use.
- Materials research additives: the bromide counter-ion makes this compound attractive as a diammonium additive in materials studies where both the organic cation and halide contribute.
- Controlled free-amine generation: because the amines are protected as a salt, the reactive free diamine can be released on demand by simply adding base during a procedure.
Specifications
- Brand: TCI
- CAS number: 18773-04-1
- Category: Chemistry > Building Blocks > Non-Heterocyclic Building Blocks
- Pack sizes: available in standard TCI catalogue pack sizes; please confirm the required size when ordering
- Physical form: crystalline solid (dihydrobromide salt of a diamine)
- Storage note: keep in a closed container in a cool, dry place away from moisture
Handling and Storage
Store the material in its original tightly closed container, in a cool and dry place protected from moisture and direct sunlight, since ambient humidity in tropical conditions can cause a hygroscopic powder to cake and complicate accurate weighing. Amber glass or the supplier's own container with a secure closure is suitable, and the cap should be replaced immediately after each use. Weigh and transfer the solid using clean, dry spatulas to avoid contamination of the bulk. Handle with standard laboratory protective equipment — lab coat, safety glasses, and gloves — and work in a well-ventilated area or a fume hood when dispensing powder. Take particular care when adding base to liberate the free amine, as the released diamine has a strong odour and should be handled only under proper ventilation. Always consult the manufacturer's safety data sheet before use.
