二氯甲烷*

品级Grade                               ACS级  
                                    （ACS reagent, ≥99.5%）
外观Appearance                          Colorless liquid
红外光谱鉴别Infrared spectrometry       Conforms
含量（CH2Cl2）Assay  ≥99.5%
色度，黑曾单位COLOR TEST                 ≤10 APHA
蒸发残渣Residue after evaporation       ≤0.002%
可滴定酸Titrable acid                   ≤0.0003meq/g
游离卤素Free halogens                   Passes test
水分Water                               ≤0.02%
稳定剂stabilizer                        50ppm amylene

品级Grade                               ACS级  
                      （ACS reagent, ≥99.8% （GC）, ≤0.001% water）
含量assay                              ≥99.8% （GC）
游离氯free chlorine （Cl）               ≤0.00002%  
甲醛formaldehyde                       ≤0.0005%  
非蒸发物non volatile matter            ≤0.0005%
游离酸free acid （as HCl）               ≤0.001%
水分water                              ≤0.001%  （Karl Fischer）
chloroform                         ≤0.01%  （GC）
*tetrachloromethane             ≤0.01%  （GC）
氯chloride （Cl-）:                      ≤0.5 ppm
cation traces by ICP Atomic emission
  Al:                                  ≤0.5 ppm
  B:                                   ≤0.02 ppm
  Ba:                                  ≤1 ppm
  Ca:                                  ≤0.5 ppm
  Cd:                                  ≤0.05 ppm
  Co:                                  ≤0.02 ppm
  Cr:                                  ≤0.02 ppm
  Cu:                                  ≤0.02 ppm
  Fe:                                  ≤0.1 ppm
  Mg:                                  ≤0.1 ppm
  Mn:                                  ≤0.02 ppm
  Ni:                                  ≤0.02 ppm
  Pb:                                  ≤0.1 ppm
  Sn:                                  ≤0.1 ppm
  Zn:                                  ≤0.1 ppm
suitability complies for reaction against H2SO4
稳定剂stabilizer                      ~25 mg/L amylene

品级Grade                                      色谱纯  
                                          （for HPLC, ≥99.9%）
含量                                          ≥99.9%（GC）
色度                                          ≤10Hazen
外观                                          Colorless liquid
λ H2O reference
UV absorption
  λ: 235 nm                                   ≤1.0
  λ: 240 nm                                   ≤0.10
  λ: 250 nm                                   ≤0.02
  λ: 300 nm                                   ≤0.005
  λ: 400 nm                                   ≤0.005
游离酸（HCI）                                   ≤0.001%
游离氯                                         合格
不挥发物                                      ≤0.001%
水分                                          ≤0.02%
稳定剂stabilizer                             50-150 ppm amylene

品级Grade                                      农残级                    
                                          （for residue analysis , ≥99.9%）
纯度Purity                                    ≥99.9%（GC）
七氯环氧化物Heptachlor epoxide                ≤10 ng/L
色度                                          ≤10Hazen
外观                                          Colorless liquid
蒸发残渣Residue after evaporation             ≤0.0001%
不挥发物                                      ≤0.001%
水分                                          ≤0.01%（KF）
稳定剂stabilizer                              50-150 ppm amylene

品级Grade                               多肽合成级  
                                   （grade for peptide synthesis）
含量assay                                ≥99.9% （GC）
水分water                                ≤0.01%
多肽合成之胺试验amine test               Pass

品级Grade                               气相色谱级  
                                 （for gas chromatography，≥99.8%）
纯度Purity （GC）                         ≥ 99.8 %
红外光谱鉴别Identity （IR）               conforms
蒸发残渣residue on evaporation          ≤ 5.0 mg/l
水分Water                               ≤ 0.01 %
色度Colour                              ≤ 10 Hazen
GC/ECD （retention range 1,2,4-trichlorobenzene to decachlorobiphenyle individual signals （lindane standard））  ≤ 3 pg/ml
suitable for residue analysis           Pass

品级Grade                               光谱级  
                                （for spectroscopy, ≥99.9% （GC））
纯度Purity （GC）                        ≥ 99.9 %
色度Color                              ≤ 10 Hazen
酸度Acidity                            ≤ 0.0005 meq/g
碱度Alkalinity                         ≤ 0.0002 meq/g
Fluorescence
as quinine at 254 nm                 ≤ 1 ppb
as quinine at 365 nm                 ≤ 1 ppb
透光度Transmission
at 235 nm                            ≥ 10 %
at 240 nm                            ≥ 50 %
at 245 nm                            ≥ 80 %
at 248 nm                            ≥ 90 %
from 255 nm                          ≥ 98 %
Evaporation residue                   ≤ 0.0005 %
Water                                 ≤ 0.01 %
稳定剂stabilizer                      50ppm 2-Methyl-2-butene

品级Grade                              超干级
                               dried （max. 0.004% H2O）  
Purity （GC）                           ≥ 99.9 %
Identity （IR）                         conforms
Colour                                ≤ 10 Hazen
Acidity                               ≤ 0.0005 meq/g
Alkalinity                            ≤ 0.0002 meq/g
Chloroform （GC）                       ≤ 0.01 %
Carbon tetrachloride （GC）             ≤ 0.01 %
residue on evaporation                ≤ 10 mg/l
Water                                 ≤ 0.004 %
stabilizer                           50ppm 2-Methyl-2-butene