The calcium salt of benzoic acid (E210).
Used as a preservative, both antibacterial and antifungal.
Can be found in concentrated pineapple juice.
People who suffer from asthma, aspirin sensitivity or the skin
disease urticaria may have allergic reactions and/or find their
symptoms become worse following consumption of benzoic acid,
particularly in combination with tartrazine (E102).
Not recommended for consumption by children.