Butyl 4-Aminobenzoate (Butamben)

Butyl 4-Aminobenzoate, also known as Butamben, is the n-butyl ester of p-aminobenzoic acid with CAS number 94-25-7. It is a crystalline solid with low water solubility and is known for its local anesthetic properties. Confirm the required grade and supporting documentation for the intended application before purchasing.

Brand:
aozun
Appearance:
White crystalline powder
CAS No.:
94-25-7
Molecular Formula:
C11H15NO2
Molecular Weight:
193
EINECS:
202-317-1
Solubility:
Very slightly soluble in water

Availability:



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Product Description

Product Description

Product Overview

Butyl 4-Aminobenzoate, commonly called Butamben, is an aromatic amino ester with the molecular formula C₁₁H₁₅NO₂. It is the n-butyl ester of p-aminobenzoic acid and should be distinguished from benzocaine, which is the corresponding ethyl ester.

For buyers sourcing chemical intermediates, product selection should consider identity, assay, impurities, and the documentation required for the intended process.

Basic Chemical Information

Item	Information
Product name	Butyl 4-Aminobenzoate
Common name	Butamben
Other name	4-Aminobenzoic Acid n-Butyl Ester
CAS number	94-25-7
Molecular formula	C₁₁H₁₅NO₂
Molecular weight	193.24 g/mol
EC number	202-317-1
Appearance	White to off-white crystalline powder
Solubility	Very slightly soluble in water; soluble in alcohol

Appearance and acceptance limits should follow the agreed supply specification. Request the current specification and a representative COA before ordering.

Typical Applications

Pharmaceutical Development

Butamben is an ester-type local anesthetic used as an ingredient in certain topical medicinal formulations. Pharmaceutical use requires an appropriately qualified material, supporting documentation, and assessment against the requirements of the finished product and destination market.

Chemical Synthesis and Research

Its amino and ester functional groups make Butyl 4-Aminobenzoate a starting material for selected organic synthesis and laboratory studies. Suitability depends on the reaction, impurity profile, and analytical requirements.

Packaging and Storage

Packaging: Confirm available pack sizes, container materials, and inner packaging when requesting a quotation.
Storage: Keep tightly closed in a cool, dry place, protected from light.
Handling: Avoid dust generation and use the protective equipment specified in the SDS.
Shelf life: Follow the manufacturer’s documented shelf life or retest date.

Quality and Technical Documentation

Before purchasing, confirm:

Assay specification and test method.
Identity testing and relevant impurity limits.
Applicable grade and any claimed pharmacopoeial standard.
Batch COA, SDS, and available technical information.
Packaging, storage conditions, and batch traceability.

A high assay value alone does not establish pharmaceutical grade. Any claim of pharmacopoeial compliance or manufacturing certification should be supported by current documentation.

Frequently Asked Questions

What is Butyl 4-Aminobenzoate mainly used for?

Butyl 4-Aminobenzoate, or Butamben, is known for its local anesthetic properties. It is also used in selected chemical synthesis and research applications.

Is Butamben the same as benzocaine?

No. Both are esters of p-aminobenzoic acid, but Butamben is the n-butyl ester, while benzocaine is the ethyl ester. They have different chemical identities and should not be treated as interchangeable materials.

Is Butamben soluble in water?

It has very low water solubility. Solvent selection should be evaluated for the intended formulation or process.

Can this material be used directly in pharmaceutical products?

Suitability depends on the supplied grade, specification, supporting documentation, and applicable requirements. Confirm these details before selecting material for pharmaceutical manufacturing.