甲苯-2,4-二异氰酸酯 
  
                                        
                                         
				Reference Material
				
					This certificate is designed in accordance with ISO 17034 and ISO Guide 31. This reference material
					(RM) was designed,produced and verified in accordance with ISO/IEC 17025, ISO 17034 and a registered
					quality management system ISO 9001.
				
			 
			
			
				
					Product Name(产品名称)
					
					
					
						
						
							Tolylene 2,4-Diisocyanate in n-Hexane,1000μg/mL
						
					
				
			 
			
				
					
						Part Number(产品编号)
						91945a
					
					
						Lot Number(产品批号)
						22050266
					
						
							CAS No.
							584-84-9
						
					
						
							Mol. Formula(分子式)
								
										C9H6N2O2
								
						
					
						
							Mol. Weight(分子量)
							
								
									
									
										174.16
								
							
						
						
							Storage Temp(存储条件)
							
								
									(-18±5)℃,Keep in the shade
								
							
						
				 
						
			 
			
			
				
				
			
			
				
					
					| QC Test Results | 
				
					
					| Item | Test Results | 
						
						| Analysis method(分析方法) | GC/FID | 
						
						
						| Concentration(浓度) | 1000μg/mL | 
						
							| Uncertainty | 2% | 
				
					
					
					| Expiry Date(失效日期) | 2023-May-28 | 
			
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			Uncertainty
				
					The certified value(s) and uncertainty(ies) are determined in accordance with ISO 17034 with an 95%
					confidence level (k=2). Uncertainty is based on the Total Combined Uncertainty, including
					uncertainties of preparation, purity of neat materials, homogeneity, stability testing.
				
			 
			
				Traceability
				
					The balances used for gravimetric measurements are calibrated with weights traceable to the national
					standards. The calibration of the balances is verified annually by an external accredited
					calibration service. This analysis method has been verified using an approach consistent with ISO 17034:2016 & ISO 17025:2017.
				
			 
			
				
			
				
					
						| CERTIFICATE    ON | QC    SIGNATURE |  | 
					
						| 2022-May-29 |   | RM Release |