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Table 1 Chemical composition (% of weight) of the four mineral wools studied

From: Biosolubility of high temperature insulation wools in simulated lung fluids

  RCF AES 1 AES2 PCW
SiO2 50–58 61–67 70–80 27
Al2O3 42–50 < 1 ≥72
Fe2O3 < 0.6
MgO 2.5–6.5 > 18–27
CaO 27–33