Clothes made in China often contain formalin - are there manufacturers who do not use formalin?

I have heard that many Chinese clothing manufacturers lace the material in Formaldehyde (Formalin) so the clothes are less likely to crease. Formalin is a poison and the amounts that are being used in the clothing is many times above the safe limit (is there a safe limit?). 5 parts per million causes skin irritation, 20 ppm can lead to cancer and in one New Zealand study, it was found that the levels in some clothing was between 8000ppm and 18000ppm. What other manufacturers use formalin and are there brands that we can feel sure that formalin has not been added? I have also heard that some shampoo companies have formalin in their ingredient list. Is this true? What other poisons do we consume or wear without knowing?