Does vinegar need a hechsher?

Answer: Yes (cRc).

Reason: Production may share equipment with wine vinegar.

Source:

• cRc: vinegar (all types) requires kosher certification; “production may share equipment with wine vinegar.”

Related questions:

• Does oil need a hechsher? Vegetable oil: yes (cRc). Pure extra virgin olive oil: no (cRc).
• Does wine need a hechsher? Yes (cRc).

References: cRc (askcrc.org), “Vinegar (all types)”