WBenzethonium chloride
WBenzisothiazolinone
WBiphenyl
WBoric acid
WTert-Butylhydroquinone
WCalcium benzoate
WCalcium tartrate
WCetylpyridinium chloride
WChloroacetamide
WDiazolidinyl urea
WDimethyl dicarbonate
WDMDM hydantoin
WEthylenediaminetetraacetic acid
WImidazolidinyl urea
WIodopropynyl butylcarbamate
WIsothiazolinone
WLactic acid
WMethylchloroisothiazolinone
WMethyldibromo glutaronitrile
WMethylisothiazolinone
WNatamycin
WParaben
WNisin
WNitrite
WParasorbic acid
W2-Phenylphenol
WPhytic acid
WPolyaminopropyl biguanide
WPotassium benzoate
WPotassium nitrate
WPotassium nitrite
WPotassium sorbate
WPropyl benzoate
WQuaternium-15
WSodium benzoate
WSodium nitrate
WSodium nitrite
WSorbic acid
WSulfur dioxide
WTetrasodium EDTA
WTiabendazole
WTiclatone
WWood preservation