Orthophenyl phenol

Food additives Europe numbers: E231 
You've described Orthophenyl phenol (OPP), also known as 2-hydroxybiphenyl, correctly. Here's a summary of its role (or lack thereof) in food processing:

Not a Food Excipient:

• OPP is not a common food excipient and its use in food processing is likely prohibited due to safety concerns.

Why it's Not Used in Food:

• Antimicrobial Properties (Double-Edged Sword): While OPP does have properties that can inhibit the growth of bacteria or fungi, which seems beneficial for food preservation, it's a double-edged sword.
• Safety Concerns: The bigger issue is that OPP's safety for human consumption is questionable. Regulatory bodies like the US Food and Drug Administration (FDA) likely wouldn't approve its use in food because:
  • There's a lack of established safety data for OPP regarding food consumption.
  • Potential health risks exist, and these haven't been adequately evaluated for food applications.

Possible Other Uses:

• OPP might have some industrial applications due to its antifungal properties:
  • Fungicide: It could be used as a fungicide to prevent mold growth on certain materials. However, these applications wouldn't involve contact with food.
• Discontinued Agricultural Use: In the past, OPP may have been used in some agricultural settings, but its use is likely discontinued or restricted due to safety concerns.