Hebei Nengqian Chemical Import and Export Co., LTD
Assessed Supplier
- Assessed
Supplier - 4th
years
Assessed Supplier
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.67-03-8
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:
| Density | 1.3766 (rough estimate) |
| Melting Point | 250°C (dec.)(lit.) |
| Flash Point | 9°C |
| JECFA Number | 1030 |
| Water Solubility | 1 g/mL |
| Solubility | H2O: 0.1g/mL at20°C, clear, colorless |
| Appearance | Crystalline Powder |
| Color | White to almost white |
| Merck | 14,9295 |
| BRN | 3851771 |
| pKa | pKa 4.8 (Uncertain);9.0 (Uncertain) |
| PH | 2.7-3.3 |
| Storage Condition | room temp |
| Stability | Stable. Combustible. Incompatible with strong oxidizing agents, strong reducing agents. |
| Sensitive | Light Sensitive & Hygroscopic |
| Refractive Index | 1.6000 (estimate) |
| Physical and Chemical Properties | Melting point 250°C (dec.)(lit.) FEMA 3322 Storage Conditions 2-8°C solubility H2O: 0.1g/mL at 20°C, clear, colorless water solubility 1 g/mL sensitivity Light Sensitive & hygropic Merck 14,9295 BRN 3851771 |
| Use | For vitamin B1 deficiency |
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R39/23/24/25 - R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R11 - Highly Flammable |
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. S37/39 - Wear suitable gloves and eye/face protection S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37 - Wear suitable protective clothing and gloves. S16 - Keep away from sources of ignition. S7 - Keep container tightly closed. |
| Introduction | thiamine hydrochloride (VB1), also known as thiamine, is the first water-soluble vitamin purified by people, the chemical name is 3-[(4-amino-2-methyl-5-pyrimidinyl)-methyl]-5-(2-hydroxyethyl)-4-methylthiazolium chloride hydrochloride, it has the function of maintaining normal glucose metabolism, and is commonly used in clinical prevention and treatment of beriberi caused by lack of VB1, and is also used for adjuvant treatment of neuritis, dyspepsia and other diseases. |
| usage limit | GB 14880-94(mg/kg): cereals and their products, beverages, milk and milk drinks, 3~5; Infant food 4~8. GB 2760-2002(mg/kg): prepared wine 1~2; Instant breakfast cereals 7.5~17.5; Jelly 1.0~7.0; Fruit juice (fruit flavor) beverage 2~3; cocoa powder and other flavor nutritional solid beverages 10~22 (the corresponding nutritional milk drinks according to the dilution factor to reduce the use of). Gum base candy 16~33; Milk containing solid beverage 0.089~0.187; Soybean milk powder, soybean powder, 6~15; Soybean milk, soybean milk, 1~3. moderate limits (FDA,§ 184.1875,2000). FEMA(mg,Ikg): beverages, baked goods, meat, meat sausage, broth, milk and dairy products, spices, cereal products, all 50. |
| physiological function | thiamine hydrochloride is a form of vitamin B1, use: nutritional supplement. Vitamin B1 is involved in the intermediary metabolism of carbohydrates in the body. The deficiency of vitamin B1 in the body, the activity of supplementary carboxylase decreases, and the sugar metabolism is blocked, which affects the whole body metabolism process. The acetone was hindered in decarboxylation and could not enter the tricarboxylic acid cycle. It did not continue to oxidize and accumulated in the tissue. At this time, the nerve tissue is insufficient, so the corresponding neuromuscular symptoms can occur, such as multiple neuritis, muscle atrophy and edema, and can affect the function of myocardium and brain tissue in severe cases. Vitamin B1 deficiency can also cause indigestion, loss of appetite and constipation. |
| deficiency | vitamin B1 plays an important role in maintaining normal nerve conduction and normal activities of the heart and digestive system. Lack of susceptibility to beriberi or multiple neuritis and other symptoms. China's provisions can be used for infant food, the use of 4~8 mg/kg; In cereals and their products in the use of 3.0~5.0mg/kg; In the drink, the amount used in the milk drink is 1-2 mg/kg. This product can be strengthened with thiamine nitrate, and the specific dosage must be converted. This product plays an important role in sugar metabolism. The energy of nerve tissue is mainly used to supply sugar metabolism. Once the lack of vitamin B1 is produced, the energy supply is impaired, and the accumulation of lactic acid and pyruvate leads to polyneuritis, which shows abnormal sensation, weakness of limbs, neuromuscular soreness and atrophy, at the same time, myocardial metabolism disorder, heart palpitations, chest tightness, cardiac hypertrophy, liver blood stasis and peripheral edema and other symptoms of cardiac insufficiency. Retinin B1 mild lack tabulated inappetence and weight loss and weakness, etc. For vitamin B1 deficiency, high fever, hyperthyroidism, a large number of glucose infusion, systemic infection, diabetes and polyneuritis. |
| solubility | 1 g/mL water, 1g/18 mL glycerol, 1g/100 mL ethanol, 1g/315 of absolute ethanol, soluble in propylene glycol, practically insoluble in ether, benzene, hexane and chloroform. |
| content analysis | GB 14751-93 method arbitration method (GB 14751 93) accurate sample 0.05g, after dissolving 50ml of water, 2ml of hydrochloric acid was added and boiled, 4ml of 10% silicotungstic acid solution was added dropwise immediately, the solution was boiled for 2 hours, and filtered through a glass Crucible dried to constant weight at 80 °c. The precipitate was first washed in portions with boiling (1-20) hydrochloric acid (20 ml). It was washed once with 10ml of water and finally twice with 5ml of acetone each time, and dried to constant weight at 80 °c. Weighing. Vitamin B1(%)=(m1 × 0.1939 × 100)/m2 ×(1-X2) wherein m1-weight of precipitate after drying, g;m2-sample volume, g; x2 a sample loss on drying, Y; 0.1939 -- thiamine hydrochloride silicotungstate salt converted into thiamine hydrochloride factor. Non-aqueous titration method (GB 14751-93) accurately weigh about 160mg of sample, add glacial acetic acid 20ml, dissolve slightly hot, cool to room temperature, add 5% mercury acetate solution 5ml, 2 drops of quinaldine red-methylene blue mixed indicator (quinaldine Red 0.3g, methylene blue 0.1g, dissolved in 0.1 methanol), Titrate to sky blue with mol/L perchloric acid standard solution, strong shaking, half a minute does not fade as the end point, while the blank test. Vitamin B1(%)=(V-V0)×c× 0.1686 × 100/m3 ×(1-x2) the difference of perchloric acid standard solution consumed between the medium (V-V0)-Sample and blank, m1;c-perchloric acid standard solution concentration, mol/L;m3-sample volume, g;X2-Loss on drying,%;0.1686-per mL of 1.00mol/L perchloric acid standard solution is equivalent to the amount of vitamin B, g. FCC process special solution and solvent potassium chloride solution dissolve 250g potassium chloride (KCl) in enough water to make 1000ml. The acidic potassium chloride solution was added with 8.5ml of hydrochloric acid in 1000mL of potassium chloride solution. 1% potassium ferricyanide solution dissolve 1G potassium ferricyanide K3Fe(CN)6 in enough water to make it 100ml, and prepare it on the day of use. Oxidizing agent 4.0 mL l% potassium ferricyanide solution was mixed with enough 3.5mol/L sodium hydroxide to make mL. This solution was used within 4H. 10mg of quinine sulfate [(C20H24N2O2)2 H2SO4 2H2O] Dissolved in enough 0.1mo/L sulfuric acid to make 1000ml. Store this solution in the refrigerator in the dark. Quinine sulfate standard solution one volume of quinine sulfate mother solution was diluted with 39 volumes of 0.1mol/L sulfuric acid. The intensity of the fluorescence emitted by this solution is approximately the same as that obtained with 1 μg of thiamine hydrochloride, and the fluorometer should be calibrated frequently because the sensitivity changes at each reading within the detection range. The solution was prepared on the day of use. Preparation of thiamine hydrochloride standard mother liquor 25mg of reference standard thiamine hydrochloride of pharmacopoeia grade, pre-dried at 105 ℃ for 2H, was accurately weighed and transferred into a 1000ml volumetric flask for careful observation, avoid absorbing moisture when weighing dry standards. The weighed standard was dissolved in about 20% of dilute ethanol solution (4.0), the pH was adjusted to with dilute hydrochloric acid solution (TS-117), and acidified dilute ethanol was added to the mark. Stored in a light-shielded container in a refrigerator. This fresh mother liquor was prepared monthly. Preparation of the standard solution the absorption volume is exactly equivalent to 100 μg of the standard mother solution of the pharmacopoeia grade reference standard thiamine hydrochloride, transferred into a 100ml volumetric flask, and diluted to the mark with acidic potassium chloride solution. Take 10ml of this solution and dilute it accurately to 50.0ml with acidic potassium chloride solution. Each ml of the resulting standard solution contained 0.2 μg of the pharmacopoeia grade reference thiamine hydrochloride. Preparation of sample solution: weigh about 25mg of sample accurately, dissolve in enough acidic potassium chloride solution to 500ml, and mix well. 5ml of this solution was quantitatively and stepwise diluted with an acidic potassium chloride solution to a concentration of 0.2 μg of sample per ml. Four tubes (or other suitable containers) with a capacity of about 40ml or more are used for the measurement procedure. For three of these tubes, 3ml of oxidant was added rapidly (within 1 to 2s) with stirring, and 20ml of isobutanol was added within 30s, and the capped tubes were shaken by hand and mixed vigorously for 90s, or by air flow blowing through the mixture. A blank sample was prepared in the remaining standard test tube using an equal volume of 3.5mol/L sodium hydroxide instead of the oxidizing agent and operated in the same manner. 5ml of each sample solution was taken from four or more identical test tubes. The tubes were treated in the same manner as the tubes containing the standard solution. Add 2ml of absolute ethanol to each of the above eight test tubes, shake for a few seconds, separate the phases, and gently pour about 10ml of the transparent supernatant isobutanol solution into a standard cuvette, fluorescence is measured in a suitable fluorophotometer. A population filter having a maximum absorption transmission region at about 365nm and an exit filter having a maximum absorption transmission region at about 435nm were used. Calculate the thiamine hydrochloride (C12Hl 7C1N4OS mg number of HCI): mg number = 25(A-b)/(s-d) where A- average reading of fluorometer of sample solution treated with oxidant; B- fluorescence photometer reading of blank sample solution; s-average fluorescence photometry reading of standard solution treated with oxidant; d-fluorescence photometer reading of blank standard solution. |
| toxicity | LD50>7700-15000mg/kg (mouse, oral). GRAS(FDA,§ 182.5875,2000). |
| Use | vitamin B1 plays an important role in maintaining normal nerve conduction and normal activities of the heart and digestive system. Lack of susceptibility to beriberi or multiple neuritis and other symptoms. China's provisions can be used for infant food, the use of 4~8 mg/kg; In cereals and their products in the use of 3.0~5.0mg/kg; In the drink, the amount used in the milk drink is 1-2 mg/kg. This product can be strengthened with thiamine nitrate, and the specific dosage must be converted. biochemical research, fluorescence and phosphorescence analysis of phosphorus, clinical drugs belong to vitamin B family, for the Prevention of beriberi, multiple neuritis, central nervous system injury and other diseases. |
| production method | acetamidine and α-dimethoxymethyl-β-methoxypropionitrile in the presence of sodium alkoxide, the pyrimidine derivative is produced by condensation and hydrolysis, and the latter reacts with carbon dioxide and ammonia, and then condenses with acetic acid-gamma-chloro-Delta-acetyl propyl ester, acid hydrolysis and cyclization to obtain thiothiamine hydrochloride, after neutralization with ammonia, oxidation with hydrogen peroxide, ammonium nitrate is converted into thiamine nitrate, and finally hydrochloric acid is added. vitamin B1 is naturally found in rice bran, Bran, lean meat, peanut and other foods. Pure products are usually prepared by chemical synthesis. An excess of acetamidine hydrochloride is condensed with α-dimethoxy-β-methoxypropionitrile in basic (methanol and sodium methoxide) media to Form 3, 6-dimethyl-1, 2-dihydro-2, 4,5, 7-tetrahydronaphthalene was hydrolyzed at 98~100 ℃ and then ring-opened under alkaline condition to produce 2-methyl -4-amino -5-aminomethyl pyrimidine; then with carbon disulfide and ammonia, and then with acetic acid-gamma-chloro-gamma-acetyl propyl ester condensation, and then in hydrochloric acid, 75~78 deg C hydrolysis and ring synthesis of thiothiamine hydrochloride, finally, thiamine hydrochloride was obtained by neutralization with ammonia, oxidation with hydrogen peroxide and acidification with hydrochloric acid. Natural products exist in rice bran, germ, yeast and beans, and can be extracted from rice bran or yeast after hydrolysis. There are many synthetic methods. It can be prepared from 4-amino-2-methyl-5-acetylaminomethylpyrimidine by hydrolysis, addition condensation, cyclization hydrolysis, oxidation, substitution and the like. |
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.