分类
纯度
全部 更多 ≥98.0% 见证书 纯品型,有证书 100 μg/mL in Isooctane 35 μg/mL in Isooctane >95% 10 μg/mL in Isooctane 10 μg/mL in Cyclohexane 100μg/mL ≥97.0% 100 μg/mL in MeOH 土壤基体 100 µg/mL in Methanol 1000μg/mL 1000 μg/mL in MeOH 98.00% 95.00% 有COA 100 μg/mL in Methanol 10 μg/ml in Acetonitrile 100 μg/mL in Acetonitrile 1000 µg/mL in Methanol ≥98% ≥95.0% 5.0 mg/mL in MeOH 0.1 mg/mL in Acetonitrile 50ug/ml in methanol 0.2 mg/mL in MeOH 2.0 mg/mL in MeOH 50 μg/mL in Isooctane 97.00% ≥95% 99.00% >97.0% 10 μg/mL in Methanol 100 μg/mL in Cyclohexane 复合肥料基体 1000mg/L ≥96.0% 固体废物基体 0.5 mg/mL in Acetonitrile 1000 μg/mL in Acetone 有机肥料基体 1000 μg/mL in MeOH:AcCN (95:5) (as deriv.) 2000 µg/mL in Methanol 3μg/mL(以醛酮计) 50 μg/ml in Isooctane 1000 μg/mL in Acetonitrile 99.90% Varied conc. in Acetonitrile 50 μg/mL in Toluene 90.00% >95.0% 不同浓度 有COA,100 ug/ml in Methanol 100 μg/mL in Dichloromethane 2.0 mg/mL in CH2Cl2 2000μg/mL 50μg/mL >96.0% ≥90.0% 工业固废基体 0.2 mg/mL in CH2Cl2 100 µg/mL in n-Hexan 1000 μg/mL in Dichloromethane 5000 μg/mL in Methanol 100 µg/mL in Acetonitrile 2.0 mg/mL in Dichloromethane:Benzene (50:50) 2.0 mg/mL in Dichloromethane 5.0 μg/mL in Acetone Varied conc. in AcCN 城市污水处理污泥基体 有COA,100 ug/ml in Acetonitrile 水溶肥料基体 10 μg/mL in Hexane 100 μg/mL in Acetone 100 μg/mL in Hexane 100μg/mL(以醛酮计) 2000 μg/mL in Methanol 99.60% Varied conc. in Isooctane 肥料基体 0.1 mg/mL in Acetone 0.2 mg/mL in Methanol 0.5 mg/mL in Acetone 1000 μg/mL in Hexane 1000 μg/mL in Methanol 10μg/mL 200 µg/mL in Methanol 2000 μg/mL in Dichloromethane 2000 μg/mL in Methyl-tert-butyl ether 2μg/mL 50 μg/ml in Isooctane 94.00% >90% 定性 有COA,1000 ug/ml in Acetonitrile 0.5 mg/mL in MtBE 10 μg/mL in Acetonitrile 100 μg/mL in Toluene 1000 µg/mL in Acetone 1000 μg/mL in Cyclohexane 1000 μg/mL in Isooctane 100mg/L 20μg/mL 3000μg/mL 93.00% 99.40% 99.50% 99.70% >98% Varied conc. in CH2Cl2 Varied conc. in Hexane 城市生活固废基体 无COA 0.1 mg/mL in AcCN 0.2 mg/mL in Acetone 0.2 μg/mL in Acetone 1.0 μg/mL in Acetone 10 µg/mL in n-Hexan 1000 μg/mL in AcCN 1000 μg/mL in CH2Cl2 1000 μg/mL in Water 2.0 mg/mL in Hexane 20 μg/mL in n-Hexane 2000 μg/mL in Acetonitrile 2500 μg/mL in Acetone 3.0 mg/mL in Isooctane 35 μg/mL in Toluene 40μg/mL 500 μg/mL in Dichloromethane 5000μg/mL 50μg/ml in toluene 96.00% >98.0% ≥92.0% ≥99.0% 土壤调理剂基体 城市污泥基体 水溶性肥料基体 生活固废基体 生活垃圾基体 0.1 μg/mL in Acetone 0.15 mg/mL in MeOH 0.2 mg/mL in Dichloromethane 0.25 mg/mL in Acetone 0.5 mg/mL in Acetone 0.5 mg/mL in MeOH 0.98 1 μg/mL in Isooctane 1.6 μg/mL in Isopropanol 10 mg/mL in Water 10 μg/mL in Acetone 10 μg/mL in CH2Cl2 10.0 mg/mL in Acetone 10.0 μg/mL in Acetone 100 µg/mL in Cyclohexane 100 µg/mL in Isopropanol 100 µg/mL in Toluene 100 μg/mL in Ethyl acetate 100 μg/mL in Water 1000 µg/mL in Acetone:Dichloromethane 1000 µg/mL in Acetone:n-Hexane 1000 µg/mL in Dichloromethane 1000 µg/mL in Toluene 1000 µg/mL in n-Hexan 1000 μg/mL in Carbondisulfide 1000 μg/mL in Isopropanol 1000 μg/mL in MtBE 1000 μg/mL in Toluene 1000 μg/mL in p-Dioxane 15 μg/mL in Acetonitrile 15μg/mL 16 μg/mL in Isopropanol 160 μg/mL in Isopropanol 2.5 μg/mL in Isooctane 2000 μg/mL in Acetone:Benzene 2000 μg/mL in CH2Cl2 2000 μg/mL in Methylene chloride 2000 μg/mL in Toluene 25 μg/mL in CH2Cl2 250 μg/mL in AcCN 2μg/mlinmethanol 3.0 μg/mL in Isooctane 3.0% w/w in Isooctane 35 μg/mL in MeOH 5.0 mg/mL in Isooctane 5.0 μg/mL in Hexane 50 μg/ mL溶于甲醇 50 μg/mL溶于甲醇:水 (50:50) 500 μg/mL in Acetonitrile 500μg/mL 50ug/mlinmethanol 92.00% 97.50% 97.80% 98.91% 99.16% >80% >85% HPLC≥98% Varied conc. in Methanol ≥80.0% ≥85.0% ≥93.0% 以醛酮计:200ug/ml溶于乙腈 城市生活垃圾基体 复合微生物肥料基体 尿素基体 底泥基体 当前批次浓度 有COA,100 ug/ml in Methylene chloride 有COA,2000 ug/ml in Methanol 有COA,2000 ug/ml in Methylene chloride 有机-无机复混肥料基体 有机无机复混肥基体 有机无机复混肥料基体 有机肥基体 污水处理污泥基体 鸡粪基体 >95% >98% (冰袋运输80邮费) 0.0001 Wt% in Toluene 0.1 % wt/wt in Chloroform 0.1 mg/mL in Acetonitrle 0.1 mg/mL in Dichloromethane 0.1 mg/mL in MeOH:CH2Cl2 (50:50) 0.182mg/kg;土壤基体 0.515mg/kg;土壤基体 0.2 mg/mL in CH2Cl2:MeOH (50:50) 0.25 mg/mL in Toluene 0.288mg/kg;土壤基体 0.521mg/kg;土壤基体 0.316mg/L(需稀释) 0.326mg/L 0.314mg/L(需稀释) 0.318mg/L(需稀释) 0.394mg/L 1.21mg/L(需稀释) 6.66mg/L 1.16mg/L 6.90mg/L 1.17mg/L(需稀释) 6.67mg/L(需稀释) 1.15mg/L(需稀释) 0.410mg/L 0.398mg/L左右 0.5 mg/mL in Isooctane 0.50mg/mL溶于40%乙醇 0.75 0.77%;有机肥料基体 0.40%;有机肥料基体 0.819mg/L 0.844mg/L 0.847 0.955 0.95 0.975 0.978 1.0 μg/mL in AcCN 1.08%;复混肥料基体 0.65%;复混肥料基体 1.23mg/L左右 0.801mg/L 0.911mg/l 2.51mg/L(需稀释) 0.942mg/L 1.44mg/L 1.21mg/L 0.817mg/L 1.42mg/L 0.550mg/L 0.51mg/L左右 0.524mg/L 0.856mg/L 0.808mg/L(需稀释) 1.24mg/L(需稀释) 0.409mg/L(需稀释) 1.43mg/L(需稀释) 1.34×10⁴mg/kg;土壤基体 5.87×10³mg/kg;土壤基体 6.42×10³mg/kg;土壤基体 1.496mg/kg;固体废物基体 1.152mg/kg;固体废物基体 4.935mg/kg;固体废物基体 1.55mg/L(需稀释) 10.5mg/L 1.67mg/L 50.2mg/L(需稀释) 1.70mg/L(需稀释) 4.40mg/L 10.2mg/L(需稀释) 90.8mg/L(需稀释) 4.43mg/L(需稀释) 2.49mg/L(需稀释) 1.64mg/L 1.60mg/L左右 4.09mg/L 4.14mg/L 1.69×104mg/kg;沉积物基体 622mg/kg;沉积物基体 1.72×10³mg/kg;土壤基体 1.99mg/kg;土壤基体 15.3mg/kg;土壤基体 10 mg/mL in MeOH 10 μg/mL in Ethyl acetate 10 μg/mL in Methanol/Water 10 μg/mL in isooctane 10 μg/mL in n-Hexane 10.00mmol/kg;土壤基体 26.04mmol/kg;土壤基体 10.5μg/mL(需稀释) 2.22μg/mL 10.2μg/mL 46.5μg/mL 4.62μg/mL(需稀释) 2.21μg/mL 45.9μg/mL 100 mg/L 100 µg/mL in Acetone 100 µg/mL in Dichloromethane 100 µg/mL in Isooctane 100 µg/mL in Methanol:Dichloromethane 100 µg/mL in Methanol:Water 100 µg/mL in n-Hexane:Toluene 100 µg/mL(以醛酮计) in Acetonitrile 100 μg/mL in 40% Toluene 60% Isooctane 100 μg/mL in AcCN 100 μg/mL in Ethyl Acetate 100 μg/mL in Toluene:Isooctane=75:25 100 μg/mL in isooctane 100 μg/mL in n-Hexane 100 μg/mL in n-hexane 100 μg/mL 溶于正己烷 100 μg/mL溶于正己烷 100 μg/mL溶于甲苯 100-500 μg/mL in Methanol 1000 ppm Perchlorate for IC H2O 1000 ug/mL溶于甲醇 1000 µg/mL in Isooctane 1000 µg/mL in Isopropanol 1000 µg/mL in Toluene:n-Hexane 1000 µg/mL溶于二氯甲烷 1000 µg/mL溶于甲醇 1000 μg/ mL溶于甲醇 1000 μg/mL Isooctane 1000 μg/mL in PT Methanol - 100% 1000 μg/mL in n-Hexan 1000 μg/mL溶于乙酸乙酯 1000 μg/mL溶于二氯甲烷 10000 µg/mL in Methanol 10000 μg/mL in Methanol 1000mg/L溶于乙腈 1000μg/mL溶于0.02mol/LNaOH 1000μg/mL溶于H2O 1000μg/mL(以NO2计) 1000μg/mL(以磷化氢计) 1000μg/ml in methanol 100?g/mL 100mg/L于乙腈(以甲醛计) 100mg/L于乙腈 100mg/L(以碘计) 100µg/mL(以醛酮计) 100μg/mL左右 16μg/mL左右 100μg/mL溶于5%乙醇 106mg/kg;土壤基体 1234mg/kg;土壤基体 11.2mg/kg;土壤基体 11.6mg/kg;土壤基体 20.7mg/kg;土壤基体 11.8mg/kg;土壤基体 20.6mg/kg;土壤基体 112mg/kg;肥料基体 0.67mg/kg;肥料基体 33.6mg/kg;肥料基体 12.1mg/kg;土壤基体 3.43mg/kg;土壤基体 12.2mg/kg;肥料基体 13.9mg/kg;肥料基体 34.5mg/kg;肥料基体 1200μg/mL 13.1mg/L 19.6mg/L 13.8mg/kg;土壤基体 9.15mg/kg;土壤基体 1340mg/kg;土壤基体 653mg/kg;土壤基体 1350mg/kg;土壤基体 931mg/kg;土壤基体 137mg/kg;土壤基体 117mg/kg;土壤基体 330mg/kg;土壤基体 15 µg/mL(以醛酮计)in Acetonitrile 15.4g/kg;土壤基体 9.2g/kg;土壤基体 5.1g/kg;土壤基体 15.86mg/kg;固体废物基体 15.8mg/kg;土壤基体 150mg/kg;土壤基体 180mg/kg;土壤基体 156mg/kg;固体废物基体 64.7mg/kg;固体废物基体 1583mg/kg;土壤基体 2649mg/kg;土壤基体 16.7mg/kg;土壤基体 7.68mg/kg;土壤基体 1638mg/kg;土壤基体 3806mg/kg;土壤基体 177mg/kg;土壤基体 596mg/kg;土壤基体 184mS/m;土壤基体 34.1mS/m;土壤基体 24.4mS/m;土壤基体 19.6mg/kg;肥料基体 103mg/kg;肥料基体 0.99mg/kg;肥料基体 1930mg/kg;工业固废基体 1480mg/kg;工业固废基体 194mg/kg;土壤基体 199ng/g-201ng/g 1μg/mL 2 μg/mL in Acetonitrile 2 μg/mL in Methanol 2-1000 μg/mL in Methanol 2.0 mg/mL in Isooctane 2.0 μg/mL in Isooctane 2.0mg/mL 2.14%;餐厨垃圾基体 1.80%;餐厨垃圾基体 1.41%;餐厨垃圾基体 2.15×10³mg/kg;土壤基体 1.35×10³mg/kg;土壤基体 1.14×10³mg/kg;土壤基体 2.32mg/L(需稀释) 4.17mg/L(需稀释) 2.76mg/L 2.45mg/L(需稀释) 3.39mg/L(需稀释) 2.78mg/L(需稀释) 4.03mg/L 2.90mg/L 6.55mg/L(需稀释) 12.9mg/L 2.68mg/L 4.68mg/L(需稀释) 1.42mg/L(需稀释) 6.49mg/L左右 6.40mg/L(需稀释) 2.74mg/L(需稀释) 2.67mg/L 2.32mg/L 2.30mg/L 2.31mg/L(需稀释) 2.36g/ml;土壤基体 2.57g/ml;土壤基体 2.38mg/kg;肥料基体 0.74mg/kg;肥料基体 2.5 mg/mL in Acetone 2.5 mg/mL in Acetonitrile 2.5 μg/mL in n-Hexane 2.67%;土壤基体 1.60%;土壤基体 3.34%;土壤基体 2.71%;土壤基体 1.18%;土壤基体 20 μg/mL in Hexane 20 μg/mL in MtBE 20-2000 μg/mL in Methanol 20.0 μg/mL in Isooctane 20.9mg/kg;固体废物基体 16mg/kg;固体废物基体 28.1mg/kg;固体废物基体 4.14mg/kg;固体废物基体 200 μg/mL in Acetonitrile 200 μg/mL in Methanol 2000 µg/mL in Dichloromethane 2000 µg/mL in n-Hexan 2000 μg/mL in Acetone 2000 μg/mL in Dichloromethane:Benzene (3:1) 2000 μg/mL in Methanol/Acetonitrile 200μg/mL 20g/L 20~200μg/mL in Nonane 21.05%;掺混肥料基体 21.2mg/kg;肥料基体 5.82mg/kg;肥料基体 21.5mg/kg;固体废物基体 210mg/kg;土壤基体 133mg/kg;土壤基体 23.1mg/kg;土壤基体 55.8mg/kg;土壤基体 23.2mg/kg;土壤基体 23.3mg/kg;土壤基体 25 mg/mL in CH2Cl2 25 μg/mL in Isooctane 250 μg/mL in Methanol 2500 µg/mL in Methanol 2500 μg/mL in Methanol 250μg/mL 267μg/mL 243μg/mL 257.4g/kg;土壤基体 286.3g/kg;土壤基体 297.1g/kg;土壤基体 260mg/kg;土壤基体 1020mg/kg;土壤基体 2ng/ml~4ng/ml in nonane 2µg/ml~4µg/ml in nonane 3.0mg/mL 3.52mg/kg;固体废物基体 2.87mg/kg;固体废物基体 1.04mg/kg;固体废物基体 3.56mg/L 6.23mg/L 1.90mg/L 0.900mg/L 2.54mg/L 4.23mg/L 5.37mg/L 3.88mg/kg;土壤基体 30.80%;复合肥料基体 10.50%;复合肥料基体 32.7mg/kg;土壤基体 3373mg/kg;土壤基体 6535mg/kg;土壤基体 35 μg/mL in Isooctane:Acetone (98:2) 36.6mg/kg;土壤基体 9.53mg/kg;土壤基体 12mg/kg;土壤基体 36.8mg/kg;土壤基体 153mg/kg;土壤基体 378mg/kg;土壤基体 39.8g/kg;土壤基体 95.5g/kg;土壤基体 27.8g/kg;土壤基体 4.0 mg/mL in CH2Cl2 4.00mg/L 0.213mg/L 0.209mg/L左右 4.1mg/L 0.219mg/L(需稀释) 4.2cmol/Kg;土壤基体 6.1cmol/Kg;土壤基体 11.2cmol/Kg;土壤基体 4.40×104mg/kg;土壤基体 9.46×104mg/kg;土壤基体 4.92×104mg/kg;土壤基体 4.52μg/mL 12.59μg/mL 4.38μg/mL 11.9μg/mL 4.58μg/mL 4.88mg/kg;土壤基体 8mg/kg;土壤基体 9.85mg/kg;土壤基体 4.58mg/kg;土壤基体 6.86mg/kg;土壤基体 40.2mg/kg;土壤基体 102mg/kg;土壤基体 25.6mg/kg;土壤基体 4000 μg/mL in Dichloromethane 4000μg/mL 400NTU溶于H2O 41.8mg/kg;固体废物基体 77.2mg/kg;固体废物基体 37.6mg/kg;固体废物基体 42.9mg/kg;土壤基体 439mg/kg;土壤基体 443mg/kg;土壤基体 1138mg/kg;土壤基体 641mg/kg;土壤基体 44mg/kg;土壤基体 14.9mg/kg;土壤基体 46.1mg/kg;土壤基体 112mg/kg;土壤基体 306mg/kg;土壤基体 49.9mg/kg;土壤基体 80.1mg/kg;土壤基体 34.2mg/kg;土壤基体 4mg/kg;污泥基体 18.4mg/kg;污泥基体 5 μg/mL in Methanol 5 μg/mL in Nonane 5 μg/mL in Toluene 5 μg/mL in Water 5.18%;土壤基体 3.27%;土壤基体 4.23%;土壤基体 1.16%;土壤基体 5.55×10³mg/kg;土壤基体 50 μg/mL in Acetone 50 μg/mL in Acetonitrile 50 μg/mL in CH2Cl2 50 μg/mL溶于(壬烷和甲苯,各50%) 50-250 μg/mL in Methanol 50.0 µg/mL 500 ppm in Transformer Oil 500 ppm w/w in Transformer oil 500 µg/mL in Methanol:Dichloromethane 500 µg/mL in Methanol 500 μg/mL in Acetone 500 μg/mL in Dichloromethane:Benzene(50:50) 500 μg/mL in Isooctane 500 μg/mL in MeOH 500 μg/mL in Toluene 500-2000 μg/mL in Methanol 500-5000 µg/mL in Methanol:Dichloromethane 5000 μg/mL in MeOH 500mg/L于乙腈(以醛酮计) 500度溶于10%HCL 50mg/L 50μg/ml in Toluene 51mg/kg;土壤基体 30.7mg/kg;土壤基体 526mg/kg;土壤基体 570mg/kg;土壤基体 6.50%;固体废物基体 9.50%;固体废物基体 6000μg/mL 61.5μg/mL 58.6μg/mL 59.7μg/mL(不稀释) 62.5mg/kg;污泥基体 14.6mg/kg;污泥基体 64.5mg/kg;土壤基体 41.46mg/kg;土壤基体 650mg/kg;土壤基体 360mg/kg;土壤基体 65μg/mL左右 660mg/kg;土壤基体 109mg/kg;土壤基体 69.5mg/kg;土壤基体 75.5mg/kg;土壤基体 182mg/kg;土壤基体 69.6mg/kg;土壤基体 130mg/kg;土壤基体 15.9mg/kg;土壤基体 7.15cmol/kg;土壤基体 3.02cmol/kg;土壤基体 7.62cmol(+)/kg;土壤基体 10.8cmol(+)/kg;土壤基体 7.99mg/kg;土壤基体 71.6μg/L 5.19mg/L 74.0μg/L 5.21mg/L 73.9μg/L 73.30%;固体废物基体 6.71%;固体废物基体 45.90%;固体废物基体 74.3μg/mL 75~10000 μg/mL in Triacetin 79.1mg/kg;土壤基体 47.8mg/kg;土壤基体 8.06g/kg;土壤基体 25.8g/kg;土壤基体 60.2g/kg;土壤基体 8.63mg/kg;水溶性肥料基体 4.72mg/kg;水溶性肥料基体 5.31mg/kg;水溶性肥料基体 6.26mg/kg;水溶性肥料基体 80.00% 80.3μg/L 5.32mg/L (需稀释) 79.7μg/L 35.4mg/L 93.8μg/L 5.20mg/L(需稀释) 35.3mg/L (需稀释) 0.205mg/L 92.5μg/L(需稀释) 0.208mg/L(需稀释) 85.00% 858mg/kg;土壤基体 1147mg/kg;土壤基体 310mg/kg;土壤基体 126mg/kg;土壤基体 86.50% 89.00% 89.8mg/kg;土壤基体 7.36mg/kg;土壤基体 60.3mg/kg;土壤基体 9.27mg/kg;固体废物基体 8.67mg/kg;固体废物基体 3.84mg/kg;固体废物基体 9.48%;水溶性肥料基体 9.84mg/kg;土壤调理剂基体 9.99mg/kg;土壤基体 29mg/kg;土壤基体 900mg/kg;土壤基体 92.50% 94.50% 96.4mg/L 12.4mg/L左右 96.68% 96.90% 97.20% 97.60% 97.70% 97.90% 97.93% 99.80% 98.40% 98.50% 98.52% 98.56% 98.61% 98.62% 98.70% 98.75% 98.80% 98.90% 98.92% 99.06% 99.13% 99.20% 99.30% 99.4% 99.44% 99.49% 99.51% 99.53% 99.6% 99.65% 99.67% 99.9% >95%, 1000 μg/mL in Hexane >99% >99.0% Ethyl acetate:Acetonitrile 96:4 HPLC≥95% Isooctane:Ethyl acetate 80:20 Varied Concentration in Acetonitrile Varied conc. in Acetonitile Varied conc. in MeOH Varied conc. in Methanol:Dichloromethane (50:50) certified reference material, 1000 μg/mL in acetonitrile (as the aldehyde), ampule of 1 mL certified reference material, ampule of 5 × 1 mL ≥50.0% ≥70.0% ≥75.0% ≥90% ≥94.0% ≥97% ≥99.5% 中氯复合肥料基体 低氯澳特尔复合肥料基体 低氯加美复合肥料基体 低氯矿能复合肥料基体 农村生活固废基体 农用污泥基体 含有机质肥料基体 52.0g/kg;土壤基体 21.6g/kg;土壤基体 7.5g/kg;土壤基体 4.5g/kg;土壤基体 7.71%;土壤基体 1.01%;土壤基体 城市市政污泥基体 复混肥料基体 大量元素水溶肥料基体 微量元素叶面肥基体 无机肥料基体 有COA, density = 0.876 有COA,100 ug/ml In Methanol 有COA,100 ug/ml in Hexane 有COA,100 ug/ml in Toluene 有COA,1000 ug/ml in Isooctane 有COA,1000 ug/ml in Isopropanol 有COA,1000 ug/ml in Methanol:Acetonitrile (80:20) 有COA,1000ug/mL in Acetonitrile 有COA,1000ug/mL in Methanol:Acetonitrile (80:20) 有COA,100ug/mL in Acetonitrile 有COA,100ug/mL in Methanol 有COA,200 ug/ml in Methanol 有COA,500 ug/ml in Acetone 有COA,density = 1.019 松针基体 榕树干叶(干态计)基体 氯化钾基体 氯化铵基体 水溶性肥基体 沉积物基体 河流沉积物基体 浓度10ppm 猪粪基体 生物有机肥基体 白菜(干态计)基体 石灰性土壤基体 硫酸钾基体 碱化土壤基体 碱性土壤基体 磷酸二氢钾基体 缓释肥基体 羊粪基体 芒果树枝(干态计)基体 见证书,土黄色/粉末 analytical standard 见详情 非洲苦楝树叶基体 风化程度中等土基体 质地轻的土壤基体 高氯复合肥料基体 低氯纯硝态氮三禾高塔复合肥基体 >99%
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(S)-(+)-2-丁醇

1 2 3-三氯苯

1,1,1-三氯乙烷

1,1-二氯乙烯