本品为无色液体，为欧四柴油车尾气还原剂，质量符合德国din70070标准以及北京市地方标准db11/552-2008。指标如下;                                浓度（w%）：31.8%-33.3%                                密度（kg/m3):1087--1093                                碳酸盐（mg/kg): 小于 0.2                                磷酸盐(mg/kg): 小于 0.5                                氯化物(mg/kg): 小于 0.2                                甲醛(mg/kg): 小于 5.0                                缩二脲(w%): 小于 0.3                                碱度(w%): 小于0.2                                钾(mg/kg): 小于 0.5                                钠(mg/kg): 小于 0.5                                钙(mg/kg): 小于 0.5                                镁(mg/kg): 小于 0.5                                铁(mg/kg): 小于 0.5                                锌(mg/kg): 小于 0.2                                镍(mg/kg): 小于 0.2                                铬(mg/kg): 小于 0.2                                铜(mg/kg): 小于 0.2                                铝(mg/kg): 小于0.2两种技术路线的比较1.选择性催化还原scrscr 系统通过机内净化降低pm 排放，然后利用scr 系统降低nox 排放。2.废气再循环egregr 系统通过egr 将nox 排放降低到标准要求以下，通过doc（柴油氧化催化剂）或者doc+dpf（颗粒捕捉器）将tpm（总颗粒物）降低到排放标准

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