SINGAPORE – A Chinese brand of vinegar is now allowed to be sold again in Singapore after it was previously recalled because it contains an undeclared allergen.

The Singapore Food Agency (SFA) on September 18 ordered importer Goy Chiap Hin to recall the product after it was found to contain sulfur dioxide, an allergen that was not declared on its packaging label.

The agency then made further inquiries after speaking with the importer and found that the method used to test for sulfur dioxide had led to a false positive, the SFA said on November 5.

He did not elaborate on what this method is, but said the test is internationally accredited for most food products. The SFA has since revised and implemented an appropriate test method for sulfur dioxide in vinegar products.

In recommended concentrations, sulfite can be used in the food and beverage industry due to its antioxidant and preservative properties. Sulfite is usually tested as sulfur dioxide.

In general, it does not pose a threat to the health of consumers, except for those who are allergic to it.

This group of people who are sensitive to sulfite can develop hives, itching, stomach pain, diarrhea, and vomiting if they consume excessive amounts of the food additive.