1-Bromo-4-pentene (CAS NO.: 1119-51-3) - Honor Pigments

1-Bromo-4-pentene (CAS NO.: 1119-51-3)

CAS NO.: 1119-51-3

Content:98.00%

Application: Used in the stereoselective synthesis of 7α-(3-carboxypropyl) estradiol, preparation of thioacetates like those in sialic acid derivatives, and recent syntheses of DL-histrionicotoxin and benzophenone-containing fatty acids. etc..

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Description

Product Overview

1-Bromo-4-pentene (also known as 5-Bromo-1-penteneor 4-Pentenyl bromide) CAS No.: 1119-51-3 , with the chemical formula C₅H₉Br and a molecular weight of 149.03 g/mol. It is a clear colorless to light yellow liquid. This compound belongs to the class of alkyl halides with an alkene group and is primarily used in organic synthesis and as a reagent, though it is subject to safety regulations due to its flammable and irritant properties.

Properties

5-Bromo-1-pentene exhibits the following key physical and chemical properties:

  • Physical State: Liquid (at room temperature).
  • Appearance: Clear colorless to light yellow liquid.
  • Odor: Not specified.
  • Melting Point: -106.7 °C (estimate).
  • Boiling Point: 126-127 °C at 765 mmHg (lit.).
  • Density: 1.258 g/mL at 25 °C (lit.).
  • Solubility: Insoluble in water; soluble in organic solvents like chloroform, ethanol, and ether.
  • Stability: Stable under normal conditions; incompatible with strong oxidizing agents; flammable.
  • Toxicity: Moderately toxic; causes skin irritation, eye irritation, and respiratory irritation; may cause dizziness, nausea, and central nervous system effects upon inhalation.

Applications

The primary applications of 5-bromo-1-pentene include:

  • Organic Synthesis Intermediate: Used in the stereoselective synthesis of 7α-(3-carboxypropyl) estradiol, preparation of thioacetates like those in sialic acid derivatives, and recent syntheses of DL-histrionicotoxin and benzophenone-containing fatty acids.
  • Reagent: Employed in the production of pharmaceuticals, agrochemicals, fragrances, polymers, and as an analytical reagent.
  • Other: Serves as a versatile building block in organic chemistry for introducing alkyl chains with functional groups.

Classification

The following table outlines the classification of 5-bromo-1-pentene based on chemical properties, uses, and regulations:

Classification Type Specific Category Description
Chemical Class Alkyl Halide (Bromoalkene) An unsaturated bromoalkane, reactive in nucleophilic substitution and addition reactions.
Usage Class Organic Synthesis Reagent/Intermediate Primarily used as a reagent and intermediate in chemical synthesis.
Hazard Class Flammable Liquid (UN 1993); Irritant Flammable (H225, flash point ~31 °C); skin irritant (H315), eye irritant (H319), respiratory irritant (H335); Packing Group III.
Regulatory Class Controlled Chemical (REACH, TSCA) Listed under EU REACH and US TSCA; subject to environmental and safety controls (WGK 3 in Germany).

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