Hebei Nengqian Chemical Import and Export Co., LTD
Assessed Supplier Enterprise Certification
- Assessed
Supplier - 4th
years
Assessed Supplier Enterprise Certification
Product Certification&
Enterprise Certification
Country: 
China (Mainland)
Business Type:Trading Company
Tel: +86 18233902561
Mobile: +86 18233902561
Tel: +86 18233902561
Fax: 4001020630
URL: https://www.nengqianchemical.com/
Province/state: Hebei
City: Handan
Street: No.1722, Block C, Yangguang Xinzhuo Plaza, 256 Renmin West Road, Fuxing District, Handan City, Hebei Province
MaxCard:
Ms.AnnaCAS NO.2746-19-2
medical grade(1-50)Metric Tonmedical grade(50-500)Metric Ton
Our Advantage
Rich Experience
Our products are sold all over Europe,North&South America, Sino-East, Asia and pacific area as well as Africa,we establish long term.
Quality service
Company cooperates with research institutes. We strictly control the process of raw materials up to finished product.
24 hour service
Quick and clear response to customers questions. Warm after sale service, we will help to solve the problems in your usage.
High quality
Dedicated to serving customers first, we provide reasonable prices, high quality products.
| Molecular Formula | C9H8O3 |
| Molar Mass | 164.16 |
| Density | 1.405±0.06 g/cm3(Predicted) |
| Melting Point | 140-145°C(lit.) |
| Boling Point | 331.1±42.0 °C(Predicted) |
| Flash Point | 163.8°C |
| Solubility | Chloroform |
| Vapor Presure | 0.00016mmHg at 25°C |
| Appearance | White white crystalline powder |
| Color | White to Off-White |
| Storage Condition | Inert atmosphere,2-8°C |
| Refractive Index | 1.583 |
| MDL | MFCD00630580 |
| Risk Codes | R37/38 - Irritating to respiratory system and skin. R41 - Risk of serious damage to eyes R42/43 - May cause sensitization by inhalation and skin contact. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S37/39 - Wear suitable gloves and eye/face protection S24 - Avoid contact with skin. S22 - Do not breathe dust. |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 29189900 |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Use | Cis-5-norbornene-outer -2, 3-dicarboxylic anhydride is also called exomethylene tetrahydrophthalic anhydride. Methylene tetrahydrophthalic anhydride is divided into inner and outer configurations, namely inner methylene tetrahydrophthalic anhydride and outer methylene tetrahydrophthalic anhydride. The two configurations have different Uses. Exomethylene tetrahydrophthalic anhydride is an important chemical raw material, which is widely used in electronics, synthetic resins, petroleum industry, pesticides and other fields. |
| preparation | weigh 98g of maleic anhydride and 26g of dicyclopentadiene, place them in a reaction kettle, add 100mL of dichloromethane, seal, stir, and raise the temperature to 150 ℃. after the reaction is complete, the obtained reaction solution is cooled, crystallizated, separated and dried to obtain shun -5-norbornene-outer -2,3-dicarboxylic acid anhydride crude product 47.5g (yield 72.35%). Take 500g of crude product (chromatographic purity 68.12%), add 500ml of propanol, heat to 85±5 ℃, reflux until dissolved completely, stir, cool to room temperature, cool to -25±5 ℃ for 5-6h, filter, and collect crystals; Add 250ml of propanol to the above crystals, heat to 85±5 ℃, reflux until dissolved completely, stir, cool to room temperature, it is placed at -5±5 ℃ for cooling and crystallization for 2h ~ 3h, filtration, crystal collection and drying to obtain 335.52g of cis-5-norbornene-outer -2, 3-dicarboxylic acid anhydride, melting point: 142.0 ℃ ~ 142.5 ℃, yield 98.51% and purity 99.91%. |
Our company specializes in processing and selling chemical raw materials, chemical products, pharmaceutical intermediates, veterinary medicine intermediates, dye intermediates, pigments, cosmetics raw materials and chemical reagents,
Our company has a number of sales team, service and information feedback vertical integration of a sound marketing network, products are sold throughout the country and exported to South Asia, Europe, America, Africa and other more than 20 countries and regions.
Companies adhering to the "pursuit of quality, innovation and development" business philosophy, to serve as a foundation, for the survival by the quality, seek development by science and technology, adhere to quilty comes first,fair price,good sense of customer service and responsibility. in the future hebei Nengqian import and export trade Co.,Ltd will always hold "integrity, innovation" business philosophy, to achieve honesty management, on the way of specialization, internationalization, Keep moving!
Superiority
As a reliable partner for Chinese market, we are specialized in chemical raw materials; consolidate sourcing, marketing, sales, distribution and after-sale services, providing our partners with sourcing evaluation, technology supports, toll/contract manufacture, investment solution and suitable partnership establishment in China.
Service we can provide:
1. provide costomers with "one-stop"packaging service,from manufacture ,research,development,production,export and so on
2. Quality control, before shipment.
3. Prompt shipment with professional documents
4. Packing as your request, with photo before shipment
5.Mix and different products in ONE PCL,increase the working efficiency for customers.
6.We can export from many China main ports,convenient for the customes provide logistics services.
Our advantages:
1, High quality with competitive price:
1) Standard:BP/USP/EP/Enterprise standard
2) All Purity≥99%
3) We are manufacturer and can provide high quality products with factory price.
2, Fast and safe delivery
1) Parcel can be sent out in 24 hours after payment.Tracking number available
2) Secure and discreet shipment.Various transportation methods for your choice.
3) Customs pass rate ≥99%
4) We have our own agent/remailer/distributor who can help us ship our products very fast and safe,
and we have stock in there for transferring.
Product Packaging：
1) 1kg/bag (1kg net weight, 1.1kg gross weight, packed in an aluminum foil bag)
2) 25kg/drum (25kg net weight, 28kg gross weight; Packed in a cardboard-drum with two plastic-bags inside; Drum Size: 510mm high, 360mm diameter)
Storage：
Stored in a cool and dry well-closed container. Keep away from moisture and strong light/heat.
Delivery：
Usually within3-5 working days after full payment.
transport：
EMS,DHL, TNT, UPS ,FEDEX, BY AIR, BY SEA
DHL Express, FedEx and EMS for quantity less than 50KG, usually called as DDU service;
Sea shipping for quantity over 500KG; And air shipping is available for 50KG above;
For high value products, please select air shipping and DHL express for safe;
Our Service:
1. Fast Delivery: We can delivery within 24 hours upon receipt of your payment.
2. Quality can be promised. Hot sell to Worldwide.
3. Payment Terms: T/T,, t/t
4. Free Sample available at any time.
5. Tracking your order at any time. Inform your order's further new situation at any time.
6. Package: Professional packing with professional materials.
FAQ:
1.Are you a trade company or factory
We are a factory with our own trading company.
2.How do you control the quality
Our factory is equipped with professional technicians to control quality, out inspectors take sample for testing every 2 hours to ensure the quality of our production. We also accept BV, SGS or any other Third-party inspection.
3.How long is lead time
We deliver goods within 3 days for small order, 7-10 days for bulk order.
4. Where is your factory located How can I visit the factory
Our factory located in HEBEI, China.
5.Can i get some samples
Yes, we can supply free sample, but the shipping cost be paid by our customers.
6.How to start orders or make payments
Proforma invoice will be sent first after confirmation of order, enclosed our bank information.Payment by T/T,
7. How to confirm the Product Quality before placing orders
You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples.
8. How long is lead time
We deliver goods within 3 days for small order, 7-10 days for bulk order.
9.How do you treat quality complaint
First of all, our quality control will reduce the quality problem to near zero. If there is a realquality problem caused by us, we will send you free goods for replacement or refund your loss.