Sodium Hexametaphosphate ( SHMP ) 68%
| 
					 items  | 
				
					 Industrial grade  | 
				
					 Food grade  | 
			
| 
					 Total phosphate (P2O5)  | 
				
					 68% min  | 
				
					 68% min  | 
			
| 
					 Inactive phosphate(P2O5)  | 
				
					 7.5% max  | 
				
					 7.5% max  | 
			
| 
					 Iron (Fe)  | 
				
					 0.05% max  | 
				
					 0.05% max  | 
			
| 
					 PH value(1% solution)  | 
				
					 5.8-7.3  | 
				
					 5.8-6.5  | 
			
| 
					 solubility  | 
				
					 Qualified  | 
				
					 Qualified  | 
			
| 
					 Heavy metals (Pb)  | 
				
					 --------  | 
				
					 0.001% max  | 
			
| 
					 Arsenic (As)  | 
				
					 --------  | 
				
					 0.0003% max  | 
			
| 
					 Fluoride (F)  | 
				
					 --------  | 
				
					 0.003% max  | 
			
| 
					 Water insoluble  | 
				
					 0.05%max  | 
				
					 0.06% max  |