E231 - Orthophenyl phenol

Origin

Orthophenyl phenol (OPP), also known as 2-phenylphenol, is a synthetic organic compound. It is a white to slightly yellowish crystalline solid at room temperature. It is produced through the sulfonation of benzene followed by reaction with phenol and subsequent neutralization. It is a broad-spectrum antimicrobial agent.

Usage

Orthophenyl phenol is primarily used as a fungicide and disinfectant. It is applied to protect fruits and vegetables post-harvest from fungal decay. It is also used in household and industrial disinfectants, sanitizers, and deodorizers. Its antimicrobial properties make it useful in various applications where microbial growth needs to be controlled. It is also used in the textile industry as a preservative.

Side Effects

While orthophenyl phenol is considered relatively safe at permitted levels, some concerns exist regarding its potential health effects. Studies have shown that it can be a skin and eye irritant. There is also evidence suggesting that it may have carcinogenic potential, particularly in the urinary bladder of rats, at high doses. The International Agency for Research on Cancer (IARC) has classified OPP as Group 3, meaning it is not classifiable as to its carcinogenicity to humans. The acceptable daily intake (ADI) has been established, and regulatory bodies monitor its use to ensure exposure remains within safe limits.

Regulatory Status

The use of orthophenyl phenol is regulated in many countries. Regulatory bodies like the European Food Safety Authority (EFSA) and the U.S. Environmental Protection Agency (EPA) have established acceptable levels for its use in food and other applications. These regulations aim to minimize potential health risks while allowing for its beneficial antimicrobial properties to be utilized. The specific regulations and permitted uses may vary from country to country.