SINGAPORE-A brand of vinegar from China is allowed again for sale in Singapore after it was earlier recalled for containing an undeclared allergen. The Singapore Food Agency( SFA) had on Sept 18 ordered importer Goy Chiap Hin to recall the product after it was found to contain sulphur dioxide, an allergen that was not declared on its packaging label. The agency did further investigations after engaging with the importer, and found that the method used to test for sulphur dioxide had led to a fal