The scent and feel of a fresh load of laundry instantly lifts the spirits. However, soft laundry can be surprisingly hard to ...
苦精颜色和性质:苦精为白色结晶性粉末, 熔点163~170℃, 无嗅,有苦味,苦精极易溶于水、乙醇、乙二醇等,其水溶液呈中性。 用途:苦精是世界上已知最苦的物质,在溶液中的度达0.003%时便使人难以忍受,在日用品和工业品中用作苦味剂(或厌恶剂),可以防止 ...