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: 86-139-10575315
Tel: +86 15632961819
Tel: +86 18233902561
Tel: +86 15717685612
Tel: +86 16630923639
Tel: +86 18732968538
Tel: +86 18833033983
Tel: +86 19831957301
Mobile: +86 19831957301
Tel: 86-139-10575315
Fax: 4001020630
URL: https://www.nengqianchemical.com/
Province/state: Hebei
City: Handan
Street: Congtai District, La Defense North
MaxCard:
Ms.AnnaCAS NO.60-51-5
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 | 229.26 |
| Density | 1.281 |
| Melting Point | 52-52.5°C |
| Boling Point | 107°C (0.05 torr) |
| Flash Point | 107°C |
| Water Solubility | Slightly soluble. 2.5 g/100 mL |
| Vapor Presure | 2.5 x 10-4 Pa (25 °C) |
| Appearance | solid |
| Merck | 13,3246 |
| BRN | 1785339 |
| pKa | 14.40±0.46(Predicted) |
| Storage Condition | 2-8°C |
| Refractive Index | nD65 1.5334 |
| Physical and Chemical Properties | Density 1.281 melting point 52-52.5°C boiling point 107°C (0.05 torr) water-soluble clear solution. 2.5g/100 mL |
| Use | It is a kind of disinfectant and acaricide, which can control a wide spectrum of pests and mites on a variety of crops, and is especially effective for health pests |
| toxicity | the acute oral LD50 of pure products to rats is 500~600 mg/kg, and that of industrial products is 320~380 mg/kg(94% ~ 96%). The acute percutaneous LD50 in male rats was 650mg/kg. The acute oral LD50 was 15mg/kg for male ducks and 40mg/kg (30mg/kg) for female ducks. Carp LC50 was 40mg/L(48h). The LD50 of bees is 0.09 μg/bee. |
| use | systemic insecticide and acaricide, with contact killing and certain gastric toxicity, no fumigation effect. It can be used to prevent and control pricking mouthpart pests on a variety of crops, and is efficient against aphids, mites and latent leaf pests. It is used in rice, cotton, vegetables, fruit trees and other crops. For example, to control cotton aphid, cotton red spider and cotton bridge-building insect, spray 7.5~9kg of water with 40% emulsifiable concentrate of 7.5~10.5mL/100 m2, or spray 225~300g of 1.5% powder. It is used to control rice leafhopper, rice planthopper and rice thrips. 40% emulsifiable concentrate 7.5mL/100 m2 is used to spray 5.6~7.5kg of water. For leaf hoppers and planthoppers that produce antibodies, 50% rice blast net emulsifiable concentrate is increased by 5mL, which can improve the control effect. In addition, it can also be used to control aphids on vegetables, soybeans, rape, and astragalus crops, citrus fruit flies, scale insects, leaf-minding flies, vegetable ground cutworms, pear stink bugs, pear aphids, apple red spiders, mole crickets and other pests. It is better to use it above 20 ℃ with a residual effect of 5~7 days. It is a systemic contact killer and acaricide, which can control broad-spectrum pests and mites on a variety of crops, and is particularly effective against sanitary pests It is a contact killer and systemic insecticide, acaricide, mainly used to control pests of cotton, vegetables and other crops used to control aphids, red spiders, leaf jumping insects and other pests dimethoate is a high-efficiency broad-spectrum insecticide with contact and systemic acaricide. It has a higher toxic effect on a variety of pests, especially thorn and suction device pests, and has a wide range of insecticides. It can control aphids, red spiders, leaf miner flies, thrips, fruit flies, leaf bees, planthoppers, leafhoppers, and scale insects. Dimethoate can sneak into plants to maintain the efficacy for about a week. The oral LD50 of mice is 156.3 mg/kg, the percutaneous LD50 is 700-1150 mg/kg, and the intraperitoneal LD50 is 184 mg/kg. |
| production method | industrial production methods of dimethoate mainly include chloroacetylmethylamine method and post-amine solution method. The latter method was developed after the chloroacetylmethylamine method. This method has few side reactions, the product purity can reach more than 90%, and the crude product yield is about 90%. the preparation of O,O-dimethyl dithiophosphoric acid (methyl thio for short) usually adopts the interaction of P2S5 and CH3OH, the methanol is appropriately excessive, the reaction temperature is 55~60 ℃, which is a strong exothermic reaction, and special attention should be paid to safety during operation. The reaction process is more complicated, and a series of side reactions occur at the same time. The yield and content of O,O-dimethyldithiophosphoric acid 75% ~ 80%. Using appropriate catalyst, the yield and content can reach about 90% at (55±2)℃. Preparation of O,O-methyl dithiophosphate O,O-dimethyl dithiophosphate reacts with sodium carbonate (ammonium) or sodium bicarbonate at room temperature to control the end-point pH to form a salt. Preparation of O,O-dimethyl-S-(methyl acetate) dithiophosphate O,O-dimethyl-S-(methyl acetate) dithiophosphate is prepared by the action of sodium O,O-dimethyl dithiophosphate and methyl chloroacetate. The raw material ratio is 1:1.7, and the reaction temperature is 55 ℃. If continuous production process is adopted, the preheating temperature is 60~70 ℃, and the reaction temperature is (80±5)℃. The synthesis of dimethoate O,O-dimethyl-S-(methyl acetate) dithiophosphate reacts with monomethylamine, the raw material ratio is 1:(1.2~1.3), the reaction temperature is -5~0 ℃. At the end of the reaction, benzene (or trichloroethylene) is added to extract dimethoate in the reaction solution, hydrochloric acid is added to adjust the pH value to 7, and an appropriate amount of water is added to promote stratification. |
| category | pesticide |
| toxicity classification | highly toxic |
| acute toxicity | oral-rat LD50: 60 mg/kg; Oral-mouse LD50: 60 mg/kg |
| flammability hazard characteristics | thermal decomposition of toxic phosphorus oxide, sulfur oxide, nitrogen oxide gas |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; separate from food raw materials storage and transportation |
| fire extinguishing agent | sand, dry powder, foam |
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.