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.708-06-5
Pharmaceutical grade(1-50)KilogramPharmaceutical grade(51-99)Kilogram
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.
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.
| Molar Mass | 172.18 |
| Density | 1.1153 (rough estimate) |
| Melting Point | 76-80 °C (lit.) |
| Boling Point | 192 °C/27 mmHg (lit.) |
| Flash Point | 191-193°C/27mm |
| Water Solubility | Soluble in water (40 g/L at 20°C). |
| Solubility | Chloroform, Methanol |
| Vapor Presure | 0.002Pa at 20℃ |
| Appearance | Crystalline powder |
| Color | Yellow |
| BRN | 742777 |
| pKa | 8.27±0.50(Predicted) |
| Storage Condition | Keep in dark place,Sealed in dry,Room Temperature |
| Sensitive | Air Sensitive |
| Refractive Index | 1.5500 (estimate) |
| MDL | MFCD00004005 |
| Physical and Chemical Properties | Colorless needle-like or prismatic crystals. The melting point of 82 deg C, boiling point of 192 deg C (3.6kPa). Soluble in ethanol, ether and petroleum, insoluble in water, soluble in aqueous alkali solution, soluble in concentrated sulfuric acid yellow. Slightly volatile in the steam, iron chloride Brown. Preparation Method: from 2-naphthol and chloroform reaction derived. Ethanol and 2-naphthol were added to the reaction pot, and the mixture was heated to 40 ° C. And stirred for 0.5 hours. Then 30% sodium hydroxide solution was added, and the temperature was raised to 75 °c. Chloroform was added dropwise to control the reaction temperature to 78 °c. After the addition, the temperature was maintained at 78 °c for 2H. Then, the temperature was raised to 90 ° C., and ethanol and excess chloroform were distilled off. After steaming, the mixture was cooled to below 30 ° C., and allowed to stand for 6 hours. The filtrate was filtered, stirred with water, heated to 60 °c and neutralized with hydrochloric acid to a pH of 2-3. Cooling, filtration, drying of the filter cake below 60 °c, to obtain the finished product. Purposes: the product is an intermediate in organic synthesis, but also for the determination of palladium, beryllium Analytical reagents. The fluorescent whitening agent PEB can be synthesized by the ring formation of 2-hydroxy-1-naphthalene formaldehyde and diethyl malonate in the presence of acetic anhydride. Add 28 kg2-hydroxy -1-naphthalene formaldehyde, 29kg of diethyl malonate and 50kg of acetic anhydride into the reaction pot, stir, heat to 130 ℃, Reflux 8H. Heating was stopped and stirring was continued for 1H. It was cooled to 80 °c and allowed to stand for 24h. Filter with suction, wash the cake with 10% soda ash solution, and then wash the cake to Neutral with clear water. The filter cake was then added to 40kg of alcohol and dissolved by heating. Cooling, filtration. The filter cake was washed with a small amount of ethanol, dried at 60 ° C., and pulverized to obtain a standard of 36kg of fluorescent whitening agent PEB. The fluorescent whitening agent PEB is mainly used for the whitening of white materials such as selurolo White Material, polyvinyl chloride, acetic acid fiber and the brightening of coloring materials. |
| Use | Used as dye, fluorescent whitening agent Intermediate |
| purpose | This product is an intermediate in organic synthesis and an analytical reagent for the determination of palladium and beryllium. The fluorescent whitening agent PEB can be synthesized by the ring formation of 2-hydroxy-1-naphthalene formaldehyde and diethyl malonate in the presence of acetic anhydride. 28kg of 2-hydroxy-1-naphthalene formaldehyde, 29kg of diethyl malonate and 50kg of acetic anhydride were added into the reaction pot, stirred, heated to 130 ° C., and refluxed for 8 hours. Heating was stopped and stirring was continued for 1H. It was cooled to 80 °c and allowed to stand for 24h. Filter with suction, wash the cake with 10% soda ash solution, and then wash the cake to Neutral with clear water. The filter cake was then added to 40kg of alcohol and dissolved by heating. Cooling, filtration. The filter cake was washed with a small amount of ethanol, dried at 60 ° C., and pulverized to obtain a standard of 36kg of fluorescent whitening agent PEB. The fluorescent whitening agent PEB is mainly used for the whitening of white materials such as selurolo White Material, polyvinyl chloride, acetic acid fiber and the brightening of coloring materials. used as intermediate of dye and fluorescent brightener |
| production method | results from the reaction of 2-naphthol with chloroform. Ethanol and 2-naphthol were added to the reaction pot, and the mixture was heated to 40 ° C. And stirred for 0.5 hours. Then 30% sodium hydroxide solution was added, and the temperature was raised to 75 °c. Chloroform was added dropwise to control the reaction temperature to 78 °c. After the addition, the temperature was maintained at 78 °c for 2H. Then, the temperature was raised to 90 ° C., and ethanol and excess chloroform were distilled off. After steaming, the mixture was cooled to below 30 ° C., and allowed to stand for 6 hours. The filtrate was filtered, stirred with water, heated to 60 °c and neutralized with hydrochloric acid to a pH of 2-3. Cooling, filtration, drying of the filter cake below 60 °c, to obtain the finished product. Purposes: the product is an intermediate in organic synthesis, but also for the determination of palladium, beryllium Analytical reagents. The fluorescent whitening agent PEB can be synthesized by the ring formation of 2-hydroxy-1-naphthalene formaldehyde and diethyl malonate in the presence of acetic anhydride. 28kg of 2-hydroxy-1-naphthalene formaldehyde, 29kg of diethyl malonate and 50kg of acetic anhydride were added into the reaction pot, stirred, heated to 130 ° C., and refluxed for 8 hours. Heating was stopped and stirring was continued for 1H. It was cooled to 80 °c and allowed to stand for 24h. Filter with suction, wash cake with 10% soda ash solution, The filter cake was then washed with clear water until neutral. The filter cake was then added to 40kg of alcohol and dissolved by heating. Cooling, filtration. The filter cake was washed with a small amount of ethanol, dried at 60 ° C., and pulverized to obtain a standard of 36kg of fluorescent whitening agent PEB. The fluorescent whitening agent PEB is mainly used for the whitening of white materials such as selurolo White Material, polyvinyl chloride, acetic acid fiber and the brightening of coloring materials. |
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.
Packing:
1. Inner double plastic bags----25kg/Fiber drum (35*35*45cm, GW: 28kg, NW: 25kg);
2. Inner double plastic bags----5kg/Aluminum foil bag (GW: 6.5kg, NW: 5kg).
3. Inner double plastic bags----1kg/Aluminum foil bag (GW: 1.5kg, NW: 1kg).
P.S.: we accept packaging customization.
Delivery:
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, Fedex, UPS, TNT, China post, NL Post and other couriers, weight from 10g to 1000kg or even bulker.
2. Shipping details & shipping documents will be provided and sent by email.
3. We keep tracking the shippment until clients well received.
4. After years export shipping experience, with professional and experienced cooperated forwarders, we ensure that goods can be delivered in multiple ways safetly and efficiently.
About us
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,
We have compalete sales and service team , 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!
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.
You can send us your product specifications and requests,we will manufacture the products according to your requests.
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.