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Originally Posted by DAK723
I might add that solvents such as Turpenoid Natural have sparked a good deal of debate on these forums regarding whether or not they are really much safer. Since I am not a chemist, I can not answer the question, but there have been quite a few members over the years that have had backgrounds in chemistry that have suggested that there are chemicals in Turpenoid Natural that are unhealthy. So a "non-toxic" label does not necessarily mean that it is OK to use during pregnancy.
Don
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Natural turpenoid can contain small quantities of hazardous chemicals. So do a lot of natural - or synthetic - substances. Smoked sausages for example. The question is: is the amount high enough to be troublesome?
Here (here being Germany in my case) substances have to be labelled if they are considered hazardous. Used to be black symbols on orange ground and S- and R- sentences that list risk and safety measures. This system is replaced now by an international one, with black symbols on white ground and H- and P-sentences listing risks and precautions.
For example, a substance that may hurt the unborn for sure would be labelled with H360, if such risk is only suspected with H361.
http://en.wikipedia.org/wiki/GHS_hazard_statement
Both the old and the new system have codes that warn against risk to the unborn, fertility or health. That information must be on the label and further information must be provided by the producer; for example if there is only a suspicion about a risk for humans.
Since I am not in the US, I can't confirm that the same system is in place there, too, but considering the fact that the risk labeling system has been internationalized and the the US usually is very concious about proper labelling, I believe it very likely. On the other hand, I would be very surprised and shocked if - after the first decade of the 21st century is over - a manufacturer would not be punished for placing a non-toxic label on a substance that would cause harm to the unborn.
In short, I would consult the safety sheet of the solvent and colour manufacturer. I had to contact a manufacturer recently because of a similiar question and found the telephone service very helpful and fast. Within minutes I had pdfs with the information I needed.
If in doubt - for example when using an old supply of solvents or colours - replace those with unclear risks and replace them with those categorized according to modern standards. I had to do that recently with some of the chemicals we keep in our school, that might have been contaminated.