The Complete List of Suppliers for Polymethylene polyphenyl polyisocyanate

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate_

Assay:99.0% Appearance:White powder Package:IN 25kg drums Storage:Room temperature Transportation:BY SEA Application:For Organic Synthesis use  

Min. Order:1Kilogram

Supplier:HENAN NEW BLUE CHEMICAL CO.,LTD [ China (Mainland)]

CAS No.9016-87-9 Polymethylenepolyphenylisocyanate

Assay:99% Appearance:powder or liquid Package:according to customer requirements Storage:store in dry dark and ventilated place Transportation:By Sea/Air/Courier Application:Pharmaceutical industry 

Min. Order:10Gram

Supplier:Zibo Hangyu Biotechnology Development Co., Ltd [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate Manufacturer/High quality/Best price/In stock

Assay:98% Appearance:brown liquid Package:according to the clients requirement Storage:Store in dry, dark and ventilated place. Transportation:by sea or by air Application:It is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals and Dyestuff. 

Min. Order:1Kilogram

Supplier:Dayang Chem (Hangzhou) Co.,Ltd. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate manufacture

Assay:Detailed see specifications Appearance:Brown transparent liquid Package:According client's requirements Storage:Sealed and preserved Transportation:By sea/By air/By courier Application:Used for making foam plastics, adhesives et 

Min. Order:1Kilogram

Supplier:Hangzhou ZeErRui Chemical Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate Manufacturer/High quality/Best price/In stock

Assay:99% Appearance:white powder Package:According to the customer's requestment Storage:Store in dry dark and ventilated place Transportation:Fast! Safe! Promise 100% safe and successful transportation. Door to door transportation services. Application:Pharmaceutical intermediates 

Min. Order:1Metric Ton

Supplier:RongNa Biotechnology Co., Ltd [ China (Mainland)]

CAS No.9016-87-9 Factory supply Polymethylene

Assay:99.%  Appearance:white or almost white crystalline powder Package:Pack & Store:25kg cardboard barrels lined with plastic bags; or otherwise customized Storage:In cool ,dry place Transportation:Preservce in well-closed containers, prptected from light, Application:USP34 Or EP STANDERUsed as Antibiotic and Antimicrobial Agents 

Min. Order:1Kilogram

Supplier:Lonwin Chemical Group Limited [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99%min. Appearance:white powder Package:1kg/Export worthy packing; 25kg/drum Storage:In well-closed container, protected from light and in cool & dry place. Transportation:By Air, By Sea, By courier (door to door, DHL/FedEx/UPS) Application:R&D and production for pharmaceuticals and chemicals 

Min. Order:1Gram

Supplier:LIDE PHARMACEUTICALS LIMITED [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate CAS:9016-87-9

Assay:99% Appearance:Brown powder Package:According to customer requirements Storage:Sealed and preserved Transportation:Sea or Air Application:Medical research field 

Min. Order:1Gram

Supplier:Qingdao Beluga Import and Export Co., LTD [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Appearance:powder Package:Inside plastic outside Storage:Store in Dry and Ventilated place with the Room Temperature, Preserved in Original Tight Closed containers, Keep Away from Light and Heating. Transportation:We will pack and ship according to your requirements Application:The pharmaceutical industry; Food additives; Catalyst; Agrochemical industry; Organic chemicals; Inorganic chemical 

Min. Order:1Kilogram

Supplier:Hebei Nengqian Chemical Import and Export Co., LTD [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99.00% Appearance:White Powder Package:25KG/Drum Storage:Preserve in tight, light-resistant containers Transportation:By Air& By Sea Application:Pharmaceutical 

Min. Order:1Kilogram

Supplier:Golden Pharma Co., Limited [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Appearance:Powder Package:Glass bottle, customizable Storage:Store at room temperature Transportation:Air Shipping  Application:Pharmaceutical Industry 

Min. Order:1Kilogram

Supplier:Shanghai Wibson Biotechnology Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay: 98%Min Appearance:Detailed in specifications Package:According to customer  Storage:Store in dry, dark and ventilated place Transportation:By air or by sea  Application:An important raw material and intermediate used in organic Synthesis, Pharmaceuticals  

Min. Order:1Kilogram

Supplier:TAIZHOU ZHENYU BIOTECHNOLOGY CO., LTD [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Appearance:powder Package:Ex-factory package Storage:Keep in dark place,Sealed in dry,Room Temperature Transportation:1.Stock products are normally shipping within 3 working days. 2.For rush delivery, please contact our sales team for particular arrangement. Shipping Details: 1.We ship goods via DHL, Application:Pharmaceutical raw materials 

Min. Order:1Gram

Supplier:HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD [ China (Mainland)]

CAS No.9016-87-9 Polymethylenepolyphenylisocyanate

Assay:99.0% Appearance:liquid Package:Grams, Kilograms Storage:Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials. Transportation:According to customer request Application:For R&D and commerical use 

Min. Order:100Gram

Supplier:Chemlyte Solutions [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate CAS. NO.9016-87-9

Assay:99% Appearance:White Powder Package:25kg/drum, also according to the clients requirement Storage:Store In Dry, Cool And Ventilated Place Transportation:By Sea Or By Air Application:Pharmaceutical field 

Min. Order:1Kilogram

Supplier:EAST CHEMSOURCES LIMITED [ China (Mainland)]

CAS No.9016-87-9 Isocyanic acid,polymethylenepolyphenylene ester

Assay:99% Appearance:white powder Package:25kg/drum, or as per your request. Storage:Stored in cool, dry and ventilation place; Away from fire and heat Transportation:as per your request. Application:Used as Pharmaceutical Intermediates 

Min. Order:1Kilogram

Supplier:HANGZHOU YUNUO CHEMICAL CO.,LTD [ China (Mainland)]

CAS No.9016-87-9 Isocyanic acid,polymethylenepolyphenylene ester

Assay:99% Appearance:White fine powder Package:according to the clients requirement Storage:Sealed dry storage Transportation:Transportation by express, air, sea; port mainly to Qingdao / Tianjin / Shanghai, or according to customer needs to send different ports and aviation. Application:Pharmaceutical 

Min. Order:1Kilogram

Supplier:Shandong Hanjiang Chemical Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:鈮?8% Appearance:powder Package:BAG Storage:In cool ,dry place Transportation:Air or sea freight Application:for pharma use 

Min. Order:1Kilogram

Supplier:Qingdao Chengyuan Kaisheng Industry and Trade Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Reliable Quality Polymethylene polyphenyl polyisocyanate

Assay:98% Appearance:Detailed see specifications Package:Foil bag or Drum or Barrel or as customers requirements Storage:Store in dry dark and ventilated place Transportation:By courier/by air/by sea/by train Application:Pharmaceutical intermediates,custom synthesis and others 

Min. Order:0

Supplier:Jiangsu Qianyu Molecular Technology Co., LTD. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:98% Package:5kg 25kg According to clients' requirement Application:Used for making foam plastics, adhesives et 

Min. Order:0Metric Ton

Supplier:Hangzhou Keyingchem Co.,Ltd [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Appearance:see detailed specifications Package:bottle/drum Storage:keep in dry and cool condition Transportation:By Courier/Air/Sea Application:pharmaceutical use,food use,Raw materials for the synthesis of new sweeteners and certain chiral pharmaceutical intermediates. 

Min. Order:0

Supplier:Hebei Mujin Biotechnology Co.,Ltd [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99.9%min Appearance:A white or almost white crystalline powder Package:25kg net/paper drum Storage:Dry and cool Transportation:By courier, air or sea. Application:Wide use in industry 

Min. Order:0

Supplier:Hangzhou Dingyan Chem Co., Ltd [ China (Mainland)]

CAS No.9016-87-9 Isocyanic acid,polymethylenepolyphenylene ester

Assay:0.98 Appearance:Off white to slight yellow solid Package:1L 5L 10L 25L bottle Storage:Stored in shaded, cool and dry places Transportation:Handle with cares to avoid damaging the packages. Protect them from sunshine or rain. We can send by Fedex, by ship or by plane according to international rules. Application:pharma intermediate 

Min. Order:0

Supplier:Antimex Chemical Limied [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:HPLC鈮?8% Appearance:powder Storage:Sealed in dry,Room Temperature Transportation:by express or by sea Application:for pharma use 

Min. Order:0

Supplier:Hangzhou Shanyi Biotechnology Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Transportation:By sea Application:Pharmaceutical industry 

Min. Order:0

Supplier:Hebei KuiSheng Trading Co., LTD [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Appearance:Powder Package:25kg/drum,or as per customers'demand Transportation:air,sea,courier Application:Pharmaceutical Industry 

Min. Order:0

Supplier:GIHI CHEMICALS CO.,LIMITED [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:98% Application:intermediate 

Min. Order:0

Supplier:HANGZHOU TIANYE CHEMICALS CO., LTD. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate_ CAS NO.9016-87-9

Assay:99% Appearance:crystal, powder Package:as your request Storage:stay in dry, cool and well-sealed Transportation:EMS,HK EMS,FEDEX,DHL,TNT Application:Pharmaceutical intermediates 

Min. Order:1Metric Ton

Supplier:Hebei yanxi chemical co.,LTD. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:98%min Appearance:Off-white to light yellow powder Package:According to the clients requirement. Storage:Keep in cool place. Transportation:Sea/air/courier Application:Pharmaceutical intermediates 

Min. Order:0

Supplier:Hangzhou J&H Chemical Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 CAS 9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Appearance:Yellow to Orange Oil Package:A variety of packing ways for your choice Storage:Keep it in dry,shady and cool place Transportation:by Sea, by Air, by Land/EMS/TNT/DHL/ Application:Pharma;Industry;Agricultural;chemical reaserch 

Min. Order:1Kilogram

Supplier:Hubei Jiutian Bio-medical Technology Co., Ltd [ China (Mainland)]

CAS No.9016-87-9 High purity Isocyanic acid,polymethylenepolyphenylene ester 9016-87-9 CAS NO.9016-87-9 CAS NO.9016-87-9

Assay:99% Appearance:White Powder Package:10g,20g,50g,100g,500g,1kgs,5kgs,10kgs,25kgs per bag / drum / bottle Storage:Store in Cool and dry .place, keep away from strong light, high temperature Transportation:Buy sea,buy air 

Min. Order:20Metric Ton

Supplier:Jilin Artel New Materials Co., LTD [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99.0% min Appearance:Highest quality appearance Package:25kgs/drum锛?00kg/drum锛汭BC TANK Storage:Keep in dry and well ventilated warehouse, keep sealed Transportation:By air and by sea Application:Extremely good quality, widely used in Pharmaceutical Industry, Food Industry, agricultural industry etc. 

Min. Order:1Kilogram

Supplier:Hangzhou Johoo Chemical Co., Ltd [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate CAS. NO.9016-87-9

Assay:99% Appearance:White powder or granule Package:25kg drum/bag Storage:Keep in dry and cool place Transportation:by Sea, air and express Application:Used as a calcium booster in the food industry 

Min. Order:1Metric Ton

Supplier:KAISA GROUP INC [ United States]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Package:box or opp package Storage:cool drum  Transportation:air or sea Application:Polymethylene polyphenyl polyisocyanate 

Min. Order:1Milligram

Supplier:weifang yangxu group co.,ltd [ China (Mainland)]

CAS No.9016-87-9 Isocyanic acid,polymethylenepolyphenylene ester

Assay:99% Package:drum Transportation:By Sea/Air/DHL Application:chemical 

Min. Order:0

Supplier:Henan Wentao Chemical Product Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99 Appearance:powder, or liquid Package:Bottle, barrel, cargo, container, etc. Storage:Stored in room temperature, ventilated place Transportation:By air, ship, express, etc. Application:Pharmaceuticals, intermediates, APIs, custom synthesis, chemicals 

Min. Order:0

Supplier:LEAP CHEM Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Application:API 

Min. Order:0

Supplier:Wuhan Bright Chemical Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Application:Used for manufacturing polyurethane adhesives. It can also be directly added to rubber adhesive to improve the bonding performance between rubber and nylon or polyester thread. 

Min. Order:0

Supplier:Jilin Tianyun New Materials Co., Ltd [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Application:API 

Min. Order:0

Supplier:DB BIOTECH CO., LTD [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Application:API 

Min. Order:0

Supplier:Xian Changyue Biological Technology Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate Manufacturer Factory CAS 9016-87-9 PMDI

Assay:99% Haccp,,Halal,SC US FDA GMP ISO14001 Appearance:As per Certificate of analysis and our TDS, MSDS Package:Export standard and according to the clients requirement Storage:Store in dry, dark and ventilated place;ISO / Kosher /GMP licence commercial bulk capacity factory in China Transportation:By AIR or by SEA GMP licence / US-FDA,South Korea-KFDA Application:It is an important raw material and intermediate for chemical industry. 

Min. Order:5Kiloliter

Supplier:Chemwill Asia Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate CAS: 9016-87-9

Assay:99% Appearance: Brown Liquid Package:25kg/drum Storage:Store in cool and dry place, away from sun light. Transportation:By sea Application:Agrochemical Intermediates 

Min. Order:5Metric Ton

Supplier:Henan Sinotech Import&Export Corporation [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:98% Appearance:detailed see specifications Package:according to the clients requirement Storage:Store in dry, dark and ventilated place Transportation:transport by sea or by air Application:Pyridine series; Halides; Pyridines; Fluorine series; custom synthesis molecular; API Intermediates. 

Min. Order:1Gram

Supplier:Shanghai Massive Chemical Technology Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Wholesale price CAS 9016-87-9 with best price

Assay:99% Appearance:White powder Package: [Packaging]20mg, 50mg,100mg,1g,10g,100g,according to customers' requirements Storage: should be stored in a well-closed container at low temperature, keep away from moisture, heat and light. Transportation:1. Samples 1kg-10kg are shipped by international express. 2. 50kg-100kg of goods are transported by dedicated line logistics. 3. Cargo 100kg-1ton is transported by dedicated line logistics. Application:Chemical raw materials, pharmaceutical intermediates, cosmetic raw materials, etc. 

Min. Order:1Kilogram

Supplier:Zhuozhou Wenxi import and Export Co., Ltd [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate---009

Assay:99% Appearance:Oily liquid  Package:seal drum  Storage:Cool dry and dark place  Transportation:by sea  Application:Used in the manufacture of foam plastics, adhesives, etc. 

Min. Order:5000Kilogram

Supplier:Shandong Baiding Chemical Co., LTD [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Appearance:liquid Package:According to client's requirements Storage:Store in dry, dark and ventilated place. Transportation:by sea/by air/by express Application:pharmaceutical intermediates 

Min. Order:1Gram

Supplier:Hangzhou KieRay Chem Co.,Ltd. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate CAS. NO.9016-87-9

Assay:99% Appearance:liquid or powder  Package:according to the clients requirement Storage:Dry and Cool Place  Transportation:UPS FedEx ,DHL,EXPRESS LINE Application:healing drugs 

Min. Order:1Gram

Supplier:Shandong Mopai Biotechnology Co., LTD [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate CAS. NO.9016-87-9

Assay:99% Appearance:white powder Package:drum or based on customers' requirement Storage:normal temperature storage Transportation:by sea, by air Application:We have different specifications for different applications 

Min. Order:1Metric Ton

Supplier:Bluecrystal chem-union [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:98+% Appearance:off-white to white solid Package:As customer request Storage:Store in a cool,dry place and keep away from direct strong light Transportation:As customer request Application:Used for Synthesis API and Research 

Min. Order:0Metric Ton

Supplier:Triumph International Development Limilted [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Min Appearance:white powder Package:1kg/Aluminum foil bag with one plastic-bags inside.10kg/Carton Box with plastic-bags inside.25kg/Paper-drum with two plastic-bags inside. Storage:in sealed air resistant place Transportation:by air, by sea, cargo Application:healing drugs 

Min. Order:1Metric Ton

Supplier:Falcon Life Sciences Pvt. Ltd [ China (Mainland)]

CAS No.9016-87-9 POLY[(PHENYL ISOCYANATE)-CO-FORMALDEHYDE]

Assay:99% Appearance:White to light yellow to light orange fluffy powder Package:according to your requirement Storage:White to light yellow to light orange fluffy powder Transportation:by air /by train/by sea Application:lab 

Min. Order:1Kilogram

Supplier:Jiangsu Xinsu New Materials Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Acmec Polymethylene polyphenyl polyisocyanate 2.5kg

Assay:98% Appearance:See the datasheet Package:2.5kg Storage:RT Transportation:By Express, Air and Road Application:Analytical reagent, biochemical reagent, standard 

Min. Order:1bottle

Supplier:Shanghai Acmec Biochemical Technology Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Isocyanic acid,polymethylenepolyphenylene ester

Assay:99% Package:According to the customer request Transportation:According to the customer request Application:intermediate of Antimicrobial agent and Antioxidant  

Min. Order:100Gram

Supplier:SHANGHAI SYSTEAM BIOCHEM CO., LTD [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Appearance:Colorless transparent liquid Package:1KG Storage:Store sealed at 2~8 degrees Celsius Transportation:2~8 degrees low temperature transport Application:API intermediate 

Min. Order:1Gram

Supplier:Shanghai Huici Pharmaceutical Technology Co., LTD [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:white powder Appearance:Keep it in dry,shady and cool place Package:Transit could be DHL,UPS,TNT,EMS,Fedex,and so on. For mass orders, it will be delivered by air or sea. For small order, please expect 3-7 days by UPS DHL EMS. For mass order, please allow 5-8 days... Storage:Pharma;Industry;Agricultural;chemical reaserch Transportation:Any port in China Application:25kg,50kg,180kg,200kg,250kg,1000kg锛宑ustomization 

Min. Order:0

Supplier:Shandong Baimao Chemical Co., Ltd [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate CAS No.9016-87-9

Assay:99.90% Appearance:solid or liquid Package:As customer's requested Storage:sealed in cool and dry place Transportation:by courier/air/sea Application:Pharma Intermediate 

Min. Order:0

Supplier:Guangdong Juda Chemical Industrial Co.,Limited [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:98.5% Appearance:white/off-white or light yellow Package:aluminum bottle,glass bottle,PTFE bottle,cardboard drum Storage:Store in cool and dry place, keep away from strong light and heat. Transportation:by courier, by air, by sea Application:This product can be used in food/pharmaceutical/cosmetical industry 

Min. Order:0

Supplier:Suzhou Health Chemicals Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:99% Application:Industrial use 

Min. Order:0

Supplier:Yinglang Chemical Company [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:98% Application:it's used for for pharmaceutical intermediates, organic chemicals 

Min. Order:0

Supplier:SHANDONG BENRITE NEW CHEMICAL MATERIALS CO.,LTD. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate CAS. NO.9016-87-9

Assay:99% Application:Polymethylene polyphenyl polyisocyanate CAS. NO.9016-87-9 

Min. Order:0

Supplier:Wuhan 90000 Lithium Industry and Trade Co., Ltd. [ China (Mainland)]

CAS No.9016-87-9 Polymethylene polyphenyl polyisocyanate

Assay:98% Package:According to the demand of customer Storage:Sealed, dry, microtherm , avoid light and smell. Transportation:by air or by sea Application:Organic synthesis 

Min. Order:0

Supplier:Henan Allgreen Chemical Co.,Ltd [ China (Mainland)]

• Dayang Chem (Hangzhou) Co.,Ltd.