性状  绿色粉末或暗绿色片状。本品除六合物外，尚含有多种不同结晶水，最多可达18分子结晶水。色泽由绿到紫不等含结晶水的可溶于水，其无水物则不溶。难溶于醇。
熔点：90ºC
   
备注:  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。
质量标准  
   CP,用于合成：

外观Appearance                          green to dark green powder,crystals
X-射线衍射分析X-Ray Diffraction         Conforms to standard
ICP Assay                               Confirms chromium component
Cr                                      18%-26%  (titration with sodium thiosulfate)                            typically 19%-21%
SO4                                     50%-73%(gravimetric with barium chloride)
                                        typically 55%-58%
PH                                      1.0-2.5 (5%, H2O)

技术指标                                   电镀级
Cr2(SO4)3·6H2O,%                          ≥98.0
水不溶物Insoluble matter in water,%        ≤0.02
氯化物(Cl)Chloride,%                       ≤0.01
铝(Al)Aluminum,%                           ≤0.05
铁(Fe)Iron,%                               ≤0.01
钙(Ca)Calcium,%                            ≤0.01
钠(Na)Sodium,%                             ≤0.05
钾(K)Potassium,%                           ≤0.05

99.99% metals basis:

外观Appearance                          green to black powder, crystals
X-射线衍射分析X-Ray Diffraction         Conforms to standard
纯度Purity                              ≥99.99% Based on Trace Metals Impurities
ICP Assay                               Confirms chromium and sulfur component
Cr                                      15% - 25% (titration with sodium thiosulfate)
痕量金属分析total metallic impurities   ≤200ppm by ICP Atomic emission
贮存  易吸潮
用途  三价铬钝化、电镀添加剂；用于制备含铬催化剂，印染工业用作媒染剂，用于玻璃和陶瓷釉彩和腐蚀阻抑剂。
联合国编号  NA9100
Risk：  
Safety :  
Hazard :