Lube-Tech PUBLISHED BY LUBE: THE EUROPEAN LUBRICANTS INDUSTRY MAGAZINE
No.76 page 4
Constituents of metalworking fluids In some cases it is not possible to identify specific molecules because there may be differences between the raw materials selected by individual manufacturers and some materials are naturally derived and do not consist of a single molecular formula. Many of the constituents of metalworking fluids are multifunctional, for example an emulsifier may contribute to anti-corrosive properties.
Relevant chemical lists exist, for example the List of Substances for Cooling Lubricants in accordance with DIN 51385 for Metalworking and the Global Automotive Declarable Substance List (GADSL).
24 LUBE MAGAZINE No.103 JUNE 2011
A word about safety data and hazard classification
Although any hazards associated with a given constituent must appear on its safety data sheet and defines the classi- fication of the substance, the classifi- cation may or may not carry through to that of a preparation containing the substance. This depends on the applicable concentration limits (which depend on the particular hazard classifi- cation).
Furthermore, the hazard classifications for Water-Mix Metalworking Fluids relate to the concentrate and not to the diluted fluid in use, normally within the range 2% to 10%.
In recent years, a number of substances have received newly-assigned hazardous classifications and in companies where I have worked a great deal of development effort has been devoted to modifying formulations, so as to eliminate such substances.
Whilst some raw materials are classified as being hazardous, I am not aware of any which are classified as respiratory sensitisers (R42).
D. J. Neadle February 2011
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