| Chromotropic acid(indicator)  
            
              | Molecular Formula: C10H8O8S2 |  
              | Molecular Weight: 320.30 |  
              | Properties:  white needle-like crystal or powder; soluble in water; color will change with exposure to the air. |  
              | Use: In the photometry of chrome, titanium and formaldehyde,  or in the determination of chrome, titanium,  formaldehyde, nitrate etc. |  
              | Storage and transport: closed tight and avoid light. |  
              | Sensitivity | Qualified |  
              | Water solubility test | Qualified |  
              | Hcl solubility test | Qualified |    
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