1.1本规范涵盖使用沸石催化剂工艺制造的异丙苯（异丙苯）。 1.2以下规定适用于本规范中的所有规定限值:为了确定与本规范的一致性，应根据实施规程E 29的舍入方法，将用于表示规范限值的最后一个右位中的观察值或计算值舍入到“最接近的单位”。 1.3本规范中使用的所有材料，请参阅现行OSHA法规和供应商的材料安全数据表以及当地法规。

1.1 This specification covers cumene (isopropylbenzene) manufactured using a zeolite catalyst process. 1.2 The following applies to all specified limits in this specification: for purposes of determining conformance with this specification, an observed value or a calculated value shall be rounded off "to the nearest unit" in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E 29. 1.3 Consult current OSHA Regulations and Supplier's Material Safety Data Sheets, and local regulations for all materials used in this specification.