以上描述，仅作参考，并不表示您收到的产品，与此项描述完全相符，产品的出厂标准，请参见质量标准。

无色或浅黄色透明或半透明等薄片或粉粒，。系高分子水溶性蛋白质的混合体，几乎无臭，无味，在冷水中吸水膨胀，能膨胀至原重量的5～10倍。溶于热水、甘油和乙酸，不溶于乙醇、乙醚、氯仿等有机溶剂。无味、无臭。溶于热水，冷却后，冻成凝胶状。在干燥情况下能长期储存，遇湿空气受潮后，很容易受细菌作用而变质。

项目Item                                         生化试剂    
                                                  (BC)
胶冻强度gel strength ，Bloom g                  ≥ 250 （按水份12%商品胶6.67%）      
臭气与水中不溶物Odour and insoluble matter         合格        
灰分Ash,%                                       ≤ 3.0        
亚硫酸盐(SO₃)Sulfite                               合格        
砷(As)Arsenic,%                                 ≤ 0.0003      
重金属(以Pb计)Heavy metals,%                    ≤ 0.01        
干燥失重loss on drying,%                        ≤ 17.0  

备注：生化试剂级适用于细胞培养。
  

项目                                            化学纯
                                                  CP
外观:                                           黄色或微黄色块状或半透明，微带光泽的粉粒
粘度(15%浓度):                                  ≥ 15 ° E
透明度:                                         ≥ 100mm
水份,%                                          ≤ 16
灰份,%                                          ≤ 2
PH 值(1%)                                       5.5-7.0
重金属(Pb),%                                    ≤ 0.008


品级Grade                                       药用级  
                                        (Ph Eur ，USP,BP)
水  份  %                                      ≤ 14.0
胶冻强度gel strength ，Bloom g                ≥ 240 （按水份12%商品胶6.67%）
勃氏粘度（按水份12%商品胶6.67%）mPa·S         ≥ 4.7  
粘度下降 %                                     ≤ 7.0
透明度  mm                                     ≥ 450  
透过率 450nm                                   ≥ 90  
灰  份   %                                     ≤ 0.8  
二氧化硫mg/kg                                  ≤ 40
PH  值 5.0～6.5
水不溶物  %                                   ≤ 0.2
铬含量   ppm                                  ≤ 0.2
砷含量   ppm                                  ≤ 0.8
重金属   ppm                                  ≤ 50
细菌总数 个/g                                 ≤ 800
霉菌     个/g                                 ≤ 100
大肠杆菌                                      不得检出
沙门氏菌                                      不得检出


品级Grade                                       照相级  
                                        (Photography class)
水分                                          ≤ 14.0  
胶冻强度gel strength ，Bloom g                ≥ 250 （按水份12%商品胶6.67%）
粘度 mpa-s                                    ≥ 4.0  
粘度下降 %                                    ≤ 10.0
冻点 ≥                                        26.5  
透过率 450nm                                  ≥ 80  
620nm                                         ≥ 95  
溶解时间 min                                  ≤ 20  
PH值 pn                                       5.5~6.5
灰 分 %                                       ≤ 1.0  
二氧化硫 ppm                                  ≤ 20  
活性硫 ppm                                    ≤ 2.0  
易变硫 ppm                                    ≤ 2.0  
等电点 ph                                     4.7~5.0
不溶物 %≤                                    0.2  
油脂凹点 个/dm2                                2  
铁 ppm                                        ≤ 10.0  
氯化物 %                                      ≤ 0.03  
铜 ppm                                        ≤ 3