美女久久久久,国产色婷婷精品免费视频,久久99免费视频,精品久久久久久久中文字幕 91丝袜诱惑一区,在线一区免费在线观看,伊人久久五月天网噜噜,免费日韩视频线

產品名稱：           尿素

詳細說明：    河南平頂山和海南富島尿素.

化學名稱:碳酰二胺

分子式:CO(NH2)2

分子量:60.06

物理性質:為無色、無味、無臭的針狀或棱柱狀結晶。易深于水和液氨中。容易吸濕，當空氣中的相對濕度大于尿素的吸濕點時，它就吸收空氣的水份而潮解。溫度高于130度時，水溶液會直接分解為氨和二氧化碳。  尿素的化學名稱叫碳酰二胺。分子式為CO(NH₂)₂，分子量為60.06，含氮量為46.65%，是含氮量*的固

尿素國家標準（GB2440—2001）

總氮(N)(以干基計)                            ≥       46.5%    46.3 %   46.3 %   46.4%    46.2%    46.0%

縮二脲                                            ≤       0.5%     0.9 %    1.0 %    0.9%     1.0%     1.5%

水（H₂O）分                                    ≤       0.3 %    0.5 %    0.7 %    0.4%     0.5%     1.0%

鐵（以Fe計）                                ≤       0.0005 % 0.0005 % 0.0010 %                                

堿度（以NH₃計）                   ≤       0.01 %   0.02%    0.03 %                                  

硫酸鹽(以SO₄^2-計)                           ≤       0.005 %  0.010%   0.020 %                                 

水不溶物                                         ≤       0.005 %  0.010%   0.040%                                  

亞甲基二脲(以HCHO計)                    ≤                                                        0.6 %    0.6 %    0.6%

顆
粒   δ0.85mm-2.80mm                      ≥       90%      90%      90%       93%      90%      90%

      δ1.18mm-3.35mm                      ≥                                                            

      δ2.00mm-4.75mm                      ≥                                                            

      δ4.00mm-8.00mm                      ≥                                                            

注：1、若尿素生產工藝中不加甲醛，可不做甲亞甲基二脲含量的測定。
2、指標中粒度項只需符合四檔中任一檔即可，包裝標識中應標明

體氮肥。通常為白色粒狀；不易結塊、流動性好、易于使用。