Benzocaine 99 GC, a well - known local anesthetic, has gained significant attention in various industries, especially in the pharmaceutical and cosmetic sectors. As a reliable supplier of Benzocaine 99 GC, I am delighted to delve into its chemical structure and share in - depth knowledge about this remarkable compound.
Chemical Structure of Benzocaine 99 GC
Benzocaine 99 GC, with the chemical formula C₉H₁₁NO₂, belongs to the family of esters. Its systematic name is ethyl 4 - aminobenzoate. The core structure of Benzocaine consists of a benzene ring, which is a six - carbon aromatic ring with alternating single and double bonds. This benzene ring provides the compound with its characteristic stability and aromatic properties.
Attached to the benzene ring at the para - position (the 4th carbon atom) is an amino group (-NH₂). The amino group is a functional group composed of a nitrogen atom bonded to two hydrogen atoms. It has basic properties due to the lone pair of electrons on the nitrogen atom, which can accept a proton (H⁺).
On the other side of the benzene ring, at the 1st carbon atom, there is an ester functional group. An ester is formed by the reaction between an alcohol and a carboxylic acid. In the case of Benzocaine, the ester group is -COOCH₂CH₃, which is derived from the reaction of 4 - aminobenzoic acid (PABA) with ethanol. The carbonyl group (C = O) in the ester linkage gives the molecule some polarity, which influences its solubility and reactivity.
The overall structure of Benzocaine 99 GC can be visualized as a planar molecule due to the sp² hybridization of the carbon atoms in the benzene ring. The presence of the amino and ester groups on the benzene ring also affects the electron density distribution within the molecule. The amino group is an electron - donating group through resonance, which increases the electron density on the benzene ring, especially at the ortho and para positions. The ester group, on the other hand, is an electron - withdrawing group through the inductive effect, which slightly decreases the electron density on the benzene ring.
Synthesis of Benzocaine 99 GC
The synthesis of Benzocaine 99 GC typically starts with 4 - aminobenzoic Acid (PABA). PABA is an aromatic carboxylic acid with an amino group at the para - position of the benzene ring. The reaction to form Benzocaine involves the esterification of PABA with ethanol in the presence of an acid catalyst, usually sulfuric acid.
The reaction mechanism begins with the protonation of the carbonyl oxygen of PABA by the acid catalyst. This protonation makes the carbonyl carbon more electrophilic, allowing the oxygen atom of ethanol to attack it. A tetrahedral intermediate is formed, which then loses a water molecule through a series of proton transfers. Finally, the deprotonation of the intermediate leads to the formation of Benzocaine and the regeneration of the acid catalyst.
The reaction conditions need to be carefully controlled to ensure a high yield of Benzocaine 99 GC. The reaction is usually carried out under reflux conditions to maintain a constant temperature and to ensure that the reaction proceeds to completion. After the reaction, the product is purified through various methods such as recrystallization or distillation to obtain Benzocaine with a purity of 99% as determined by gas chromatography (GC).
Properties and Applications of Benzocaine 99 GC
Physical Properties
Benzocaine 99 GC is a white crystalline powder with a melting point of around 88 - 90 °C. It has a relatively low solubility in water but is soluble in organic solvents such as ethanol, chloroform, and ether. The solubility characteristics are important for its formulation in different products.
Chemical Properties
The amino group in Benzocaine can react with acids to form salts. One of the common salts is Benzocaine Hydrochloride, which is more soluble in water than Benzocaine itself. This property makes Benzocaine Hydrochloride more suitable for some pharmaceutical applications where water - soluble formulations are required.
Applications
In the pharmaceutical industry, Benzocaine 99 GC is widely used as a local anesthetic. It works by blocking the nerve signals in the area where it is applied, providing temporary relief from pain and itching. It is commonly found in over - the - counter products such as topical creams, gels, and sprays for the treatment of minor skin irritations, sunburns, and insect bites.
In the cosmetic industry, Benzocaine is used in some products to provide a numbing effect. For example, it may be included in hair removal creams to reduce the pain associated with the hair removal process.
Quality Assurance of Our Benzocaine 99 GC
As a supplier of Benzocaine 99 GC, we are committed to providing high - quality products. Our Benzocaine 99 GC is produced through a strict manufacturing process that adheres to international quality standards.
We use advanced analytical techniques such as gas chromatography (GC) to ensure the purity of our product. The 99% purity level indicates that our Benzocaine contains a very low amount of impurities, which is crucial for its safety and efficacy in various applications. In addition, we conduct rigorous quality control tests on raw materials, intermediate products, and the final product to ensure consistency and reliability.
Contact Us for Purchase
If you are interested in purchasing Benzocaine 99 GC for your business, whether it is for pharmaceutical, cosmetic, or other applications, we are here to assist you. Our team of experts can provide you with detailed product information, technical support, and competitive pricing. We understand the importance of timely delivery and excellent customer service, and we are dedicated to meeting your needs. Please feel free to contact us to start a discussion about your requirements and explore how our Benzocaine 99 GC can benefit your operations.
References
- Smith, J. A., & Johnson, B. K. (2018). Organic Chemistry: Structure and Function. Macmillan Publishers.
- Brown, T. L., LeMay, H. E., & Bursten, B. E. (2017). Chemistry: The Central Science. Pearson Education.
- Pharmaceutical Manufacturing Handbook. (2020). Wiley - Blackwell.