二      规格:99.0%    产地:日本/韩国     包装:25/250kg/桶    价格:2850元/吨

二

Dichloromethane

Cas号: 75-09-2  

分子式    CH2Cl2

分子量    84.93

别名       甲叉二氯,氯化次甲基,亚甲基二氯,亚甲基氯,甲撑氯

Methyledichloride

Methylene chloride

分子结构式   

性状       无色透明易挥发液体，具有类似醚的刺激性气味。溶于约50倍的水，溶于酚、醛、酮、冰醋酸、磷酸三乙酯、乙酰乙酸乙酯、环己胺。与其他氯代烃溶剂和乙醇、 醚及N,N-二甲基甲酰胺混溶，临界温度245℃，临界压力6.171MPa。

沸点:40℃

密度:1.325

熔点:-97℃

折光率:1.4244

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      

      GB/T　16983-1997

项目Item　　                                   分析纯　化学纯

                                               （AR）  （CP）

含量（CH2Cl2）Assay,%                        ≥ 99.5   99.0

色度，黑曾单位Color                          ≤ 10     20

密度(20℃)Density,g/mL                    1.320-1.330  1.320-1.330

蒸发残渣Evaporation residue,%                ≤ 0.002  0.004

酸度（以H+计）Acidity,mmol/100mg             ≤ 0.002  0.004

游离氯（Cl)Free chlorine,%                   ≤ 0.0001 0.0002

铁(Fe)Iron,%                                 ≤ 0.0001 0.0002

水分（H2O）Water,%                           ≤ 0.05   0.10

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)

氯仿chloroform                         ≤0.01%  (GC)

四氯化碳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 inpidual 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

贮存       密封避光保存。

用途      

联合国编号    1593

Risk：    R40-

Safety :   S23- S24/25- S36/37-

Hazard : Xn -