1.1 本规范涵盖甲苯二异氰酸酯(TDI)原料的甲苯。 1.2 以下内容适用于本规范中的所有规定限度:为了确定是否符合本规范，应根据实践中的四舍五入方法，将观察值或计算值四舍五入至表示质量标准限度时使用的最后一位右手数字中的最接近单位 E29什锦 . 1.3 有关本规范中使用的所有材料，请参考OSHA法规和供应商的安全数据表。 1.4 以SI单位表示的值将被视为标准值。括号中给出的值仅供参考。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers toluene for toluene diisocyanate (TDI) feedstock. 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 E29 . 1.3 Consult OSHA regulations and supplier’s Safety Data Sheets for all materials used in this specification. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.