ISO 8312:2015定义了用作橡胶工业复合成分的硬脂酸（包括硬脂酸和棕榈酸的混合物），并规定了描述其性能的试验方法。 附录L中给出了根据碘值和橡胶工业中使用的此类材料的典型化学和物理性质对硬脂酸和硬脂酸/棕榈酸混合物的分类。附录L仅供参考。 在本国际标准中，原子吸收光谱法是首选方法。

ISO 8312:2015 defines stearic acid (including blends of stearic and palmitic acid) for use as a compounding ingredient in the rubber industry and specifies the test methods for describing its properties. Classification of stearic acid and stearic acid/palmitic acid blends according to iodine value and typical chemical and physical properties for such materials for use in the rubber industry are given in Annex L. Annex L is given for information only. In this International Standard, the atomic absorption spectrometric method is the preferred method.