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    Related: Aromatic Amine 2-Nitrodiphenylamine PMI
    • 4-Vinylaniline CAS 1520-21-4

    4-Vinylaniline CAS 1520-21-4

    4-Vinylaniline, also called 4-aminostyrene, CAS 1520-21-4, is a vinyl-substituted aromatic amine supplied for organic synthesis, fine-chemical, and polymer/materials applications. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

    • CAS: 1520-21-4
    • Synonyms: 4-Aminostyrene 4-Ethenylaniline p-Aminostyrene Benzenamine, 4-ethenyl-
    • Einecs: 216-185-8
    • Molecular Formula: C8H9N
    • Grade: Chemical intermediate grade
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    Product Description

    4-Vinylaniline CAS 1520-21-4, also called 4-aminostyrene, is an aromatic amine with the molecular formula C8H9N and EINECS 216-185-8.

    Synonyms: 4-Aminostyrene; 4-Ethenylaniline; p-Aminostyrene; Benzenamine, 4-ethenyl-.

    CAS: 1520-21-4.

    Molecular formula: C8H9N.

    It is a white to brown powder, lump, or clear liquid depending on handling temperature, with an assay typically 97.0-98.0% min.

    Melting point is about 21-23 °C and boiling point about 213-214 °C; it is soluble in benzene, methanol, and acetone.

    It is light, air, and heat sensitive and is commonly stored under inert gas at low temperature.

    It is a defined vinyl-substituted aromatic amine intermediate recognized interchangeably as 4-vinylaniline or 4-aminostyrene.

    In organic synthesis it is a reactive vinyl-functional aromatic amine intermediate for downstream transformations.

    In fine chemical and intermediate development it provides a reactive aromatic amine scaffold for specialty synthesis.

    In materials and polymer-related development it is used in functional styrenic polymers, polyaniline-related systems, and surface-modification studies.

    In laboratory synthesis and route scouting it serves as a functional monomer or reactive intermediate for downstream evaluation.

    Store tightly closed in a cool, dark, well-ventilated area, protected from light, air, and heat; frozen or refrigerated storage (0-6 °C) under inert gas is recommended.

    Wear chemical-resistant gloves, protective eyewear, and suitable protective clothing; avoid dust or vapor formation and skin/eye contact.

    Use local exhaust ventilation in process areas and routine closed handling to reduce irritation and exposure risk.

    Every batch is controlled by identity, assay (titration or GC), appearance, and related-impurity checks, with batch COA supplied for the actual order.

    Confirm appearance, assay, related impurities, packaging, and grade as required.

    The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

    For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

    FAQ - Technical & Supply Chain

    • Q:

      What is 4-Vinylaniline CAS 1520-21-4?

      A: 4-Vinylaniline is an aromatic amine with a vinyl substituent at the para position. It has the molecular formula C8H9N and is also known as 4-Aminostyrene or p-Aminostyrene.
    • Q:

      What are the main applications of 4-Aminostyrene CAS 1520-21-4?

      A: It is mainly used as a reactive intermediate and monomer in organic synthesis and materials development. Typical uses include functional styrenic polymers, polyaniline-related conductive systems, surface modification studies, and specialty aromatic building blocks.
    • Q:

      Why can 4-Vinylaniline appear as a solid or a liquid?

      A: Its melting point is near room temperature, commonly around 21-24 C, so the physical form can change with handling and storage temperature. Commercial material may therefore be described as a powder, lump, or clear liquid depending on conditions.
    • Q:

      What are typical specifications for 4-Vinylaniline?

      A: Catalog grades are commonly listed at about 97% to greater than 98% assay, depending on the analytical method. Reference data include a molecular weight of about 119.16, a boiling point around 213-214 C, and solubility in benzene, methanol, and acetone.
    • Q:

      How should 4-Vinylaniline CAS 1520-21-4 be stored?

      A: Store it tightly closed in a cool, dark, well-ventilated area and protect it from light, air, and heat. Many suppliers recommend frozen storage below 0 C or refrigerated storage at 0-6 C, often under inert gas to reduce degradation and unwanted polymerization.

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