Formaldehyde carpenters

The so-called El-emission class describes a wood panel presenting formaldehyde emission which is low enough to prevent any danger, irritation or inflammation of the eyes, nose and mouth mucous membranes. However, it is important that not only the boards themselves, but also the veneering and carpenter s adhesive resins, laquers, varnishes and other sources of formaldehyde are under control, since they also might contribute to the mixture steady state formaldehyde concentration [9]. Table 3 gives an overview on some European regulations. However, it is necessary here to introduce the principal types of composite wood products, especially panels, that are produced in this industry ... 

Alexandersson et al. studied the effects of exposure of carpenters to formaldehyde, terpenes, and dust particles. The mean formaldehyde levels were far below the threshold value. The terpenes levels were very low and... 

Poindexter and Carpenter (2972) reported the isolation and identification of 9//-pyrido[3,4-/>]indole (norharman) and l-methyl-9//-pyrido[3,4-/>]indole (barman) from CSC. They reported that the yield of the total barmans in hurley and flue-cured MSSs was between 15 and 20 xg/gram of tobacco smoked, values which were 40 to 50 times that of the barmans in the unsmoked tobacco. Since the weight of tobacco in cigarettes sold at that time approximated 1 gram, the yield of these two compounds was about 15-20 Xg/cig. Poindexter and Carpenter concluded from experiments with radiolabeled tryptophan that the barmans (found to be radiolabeled in the smoke) were generated pyrogenetically from a reaction between aldehydes (formaldehyde for norharman, acetaldehyde for barman) and the tryptophan in tobacco. 

Hatchfield, P. Carpenter, J. Formaldehyde How Great is the Danger to Museum Collections Harvard University Art Museums Cambridge, 1987. 

Radiochemical sterilization (RCS) is an emerging technology. It is based on low-dose radiation sterilization in a dry environment at low temperatures in conjunction with the use of radiolytically and controllably generated formaldehyde gas at low levels. Details of the RCS process are described in the following excerpt from Shalaby, S.W., Doyle, Y., Anneaux, B.L., Carpenter, K.A., Schiretz, F.R. Radiochemical Sterilization and its use for Sutures (Nuclear Instruments and Methods in Physics Research B (2003) 110-114) ... 

Alexandersson et al. [19] studied the effects of exposure of carpenters to formaldehyde, terpenes, and dust particles. The mean formaldehyde levels were far below the threshold value. The terpene levels were very low and frequently undetectable and dust levels were about one-tenth of the threshold levels. At the concentration levels recorded, no respiratory effects would be expected, yet dyspnea (shortness of breath), nose and throat irritation, chest tightness, and productive cough were observed. These results were reported without explanation. 

Evostik Wood Adhesive Humbrol Carpenter s Wood Glue Unibond Woodworker Adhesive HMG PVA Adhesive HumbrolCascamite U rea/formaldehyde type, one part, mix with water. 

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