What do naphthalene depleted and ultra-low naphthalene mean?
ExxonMobil Chemical offers grades with reduced napthalene content to meet classification and labeling requirements. Naphthalene depleted (ND) indicates a naphthalene content of less than 1.0 weight percent, while ultra-low naphthalene (ULN) indicates a content of less than 0.1 weight percent. In early 2002 IARC (International Agency for Research on Cancer) classified naphthalene as a category 2B carcinogen (possibly carcinogenic to humans). In the U.S. products containing greater than 0.1 weight percent naphthalene are required to reflect this classification on the Material Safety Data Sheet (MSDS). To address this requirement, ExxonMobil Chemical has commercialized two grades, Aromatic 150 ULN and Aromatic 200 ULN. The naphthalene depleted versions of these grades continue to be offered, which have naphthalene concentrations less than 1.0 weight percent. In Europe it is expected that a similar ruling will be made, and that products containing greater than 1.0 weight percent naphthalen
