A1 steak sauce is manufactured with vinegars (white wine vinegar), sugar (high-fructose corn syrup)and condiments (vinegar) with added salt (sodium nitrite). This product can not stay open indefinitely after opening but must be kept refrigerated at all times because these ingredients will spoil very fast if left unrefrigerated like vinegar tends do so they have been made as per requirement . A1 steak sauce has very high acidic level hence its shelf life is only 6 months from date it was made therefore it is important that they are always kept refrigerated when not using . Also these sauce have preservatives added into them which help keep them from spoiling faster like sodium benzoate . These ingredients make sure that there will not get any bad smell while consuming these sauce .