Wood preservative agents

Low chlorinated naphthalenes as well as selected PAHs are known as ingredients in coal tar based wood preservation agents (Pommer, 2001 Jacobsson and Asplund, 2000). Thus, we conclude that the occurrence of the described contaminants results from impregnation activities at the former military base. 

Bu3SnOSn"Bu3 (formed by aqueous NaOH hydrolysis of Bu3SnCl) has uses as an algicide, fungicide and wood-preserving agent. 

Wood preservative is the term for a mixture of wood preservative agents and other ingredients in a solvent. This chapter focusses on organic wood preservative agents (WPA) such as lindane, PCP, dichlofluanid, tebuconazole and permethrine. 

Because wood preservative agents are biocides they might be dangerous to the environment if they volatilize from the wood into the atmosphere or indoor air. 

A way of estimating real air concentrations of wood preservative agents (WPA) is to study their volatilization under controlled conditions. This can be done in test chambers... 

By means of chamber tests in combination with an appropriate sampling and desorption method it is possible to get information about the emission behavior of wood preservative agents out of treated wood or generally of biocides emitted from other materials. In spite of the sink effects determined it is possible to calculate emission rates if an equilibrium between air and wall concentration is reached. Furthermore, it is possible to get information about sink effects if certain materials are Introduced into the chamber and analyzed afterwards or the biocide concentration on the chamber walls is determined. From this data, in combination with the knowledge of the amount of biocides used for treatment, relative losses by emissions can be calculated. 

Sulphur-containing petroleum components such as benzothiophene, DBT, and naphthobenzothiophene were obtained from seawater extracts (Warner, 1975) and were related to an oil spill. The detection of diphenyl sulphone and bis-(p-chlorphenyl) sulphone in ng amounts in the Mediterranean, as well as in oxic and anoxic Baltic waters, suggests anthropogenic input (Bouchertall, 1979) — the former compound is used as wood preserving agent and ovicide. 

Air-sensitive. Algicide fungicide, wood-preserving agent with Br2, mild oxidising agent. Liq. dj 1.17. Mp <-45 . Bpio 220-30 . aid 1.4870. 

Pentachlorophenol is toxic, the decomposition rate in nature is slow, it is lipophilic and therefore liable for bioaccumulation. The use of pentachlorophenol and its salts (e.g. as wood preservation agent) is drastically restricted or banned in many industrialized countries by law, so the open use since 1976 in Europe and since 1979 in the United States, and total stop of the use since 1985 in Europe. 

NaF for water fluoridation, wood preservatives, the formulation of insecticides and fungicides, and use as a fluxing agent. It is also used to remove HF from gaseous Fz in the manufacture and purification of Fz-SnFz in toothpastes to prevent dental caries,... 

In addition lo its use in making resins and adhesives, phenol is also the starting material for the synthesis of chlorinated phenols and the food preservatives BHT (butylated hvdroxytoiuene) and BHA (butylated bydroxyanisole). Penta-chlorophenol, a widely used wood preservative, is prepared by reaction of phenol with excess CI2- The herbicide 2,4-D (2,4-dichlorophenoxyacetjc acid) is prepared from 2,4-dichlorophenol, and the hospital antiseptic agent hexa-chlorophene is prepared from 2,4,5-trichlorophenol. 

Used industrially as a fungicide, insecticide, herbicide, wood preservation, textile drying agent, corrosion inhibitor as a veterinary medication and in the manufacture of specialty soaps. 

Tributyltin acetate, (C4H9)3SnOOCCH3, and bis(tributyltin) oxide, (C4H9)3Sn-0-Sn(C4H9>3, have been commercialized as antimicrobial agents in the paper, wood preservation, plastics and textile industries29. 

Yusuf, S., Imamura, Y., Takahashi, M. and Minato, K. (1995b). Physical and biological properties of albizzia waferboard modified with cross-linking agents. International Research Group on Wood Preservation, Doc. No. IRGAVP 95-40043. 

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