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 18732968538
Mobile: +86 18732968538
Tel: +86 18732968538
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.4316-97-6
Industrial Grade(1-10)Metric TonIndustrial Grade(10-101)Metric TonIndustrial Grade(100-300)Metric Ton
With our good experience, we offer detailed technical support and advice to assist customers. We communicate closely with customers to establish their quality requirements.
Consistent Quality
Our plant has strict quality control in each manufacturing process. Guaranteed.
Meanwhile all the materials are tested before each shipment in our laboratory to double confirm the quality.
Most competitive pricing
Our company is committed to the production and development of titanium dioxide, we always offer the most competitive pricing to customers to help lower their cost in application.
Shortest delivery time
90% of orders are shipped within 7-10 days after receipt of the prepayment or workable L/C.
Respond in 24 hours to inquiry, feedback or other requirements
Our experienced staff is dedicated to answer all of your inquires, feedback or other requirements in 24 hours.
We welcome you to contact us for more information and look forward to working with yo
Product introduction:
| Molecular Formula | C5H4Cl2N2 |
| Molar Mass | 163 |
| Density | 1.404g/cm3 |
| Melting Point | 56-60 °C (lit.) |
| Boling Point | 235.399°C at 760 mmHg |
| Flash Point | 118.838°C |
| Solubility | soluble in Methanol |
| Vapor Presure | 0.077mmHg at 25°C |
| Appearance | powder to crystal |
| Color | White to Light yellow to Light orange |
| Storage Condition | Inert atmosphere,2-8°C |
| Refractive Index | 1.551 |
| MDL | MFCD01646112 |
| Application | 4, 6-dichloro-5-methylpyrimidine is a heterocyclic organic compound, which can be used as an intermediate in organic synthesis. |
| preparation method | the first step is to quickly mix 18.9g of methanol solution 28% sodium methoxide with 4.7g of formamide, and heat the mixture under reflux, and slowly drop 30ml of methanol solution containing 5g of ethyl methylmalonate within 3 hours. The mixture is further heated and refluxed with stirring for 10 hours, and then cooled to concentrate the suspension under reduced pressure. Then, add 10ml of water to the residue and acidify it with concentrated hydrochloric acid. The precipitate obtained was filtered by suction and dried under reduced pressure to obtain 4, 6-dihydroxy-5-methylpyrimidine. 4, 6-dihydroxy-5-methylpyrimidine, 2.8g. In the second step, 2.8g of 4, 6-dihydroxy-5-ethylpyrimidine, 5.00g of phosphorus trichloride and 3.3g of diisopropylethylamine were added to the reaction vessel at 0°C, and then stirred at 80°C for 2 hours. 4 hours. The mixture is then cooled and poured into ice water. The mixture was further stirred for 30 minutes and then extracted with ethyl acetate. The organic layers are combined and washed successively with saturated sodium bicarbonate aqueous solution and saturated sodium chloride aqueous solution, and then the organic layers are dried and concentrated with anhydrous magnesium sulfate. The residue was subjected to silica gel column chromatography to obtain 2.4g of 4, 6-dichloro-5-methylpyrimidine. |
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!
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.