Hebei Nengqian Chemical Import and Export Co., LTD
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Assessed Supplier Enterprise Certification
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Country: 
China (Mainland)
Business Type:Trading Company
Tel: +86 13910575315
Tel: +86 19831957301
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Tel: +86 18233902561
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Mobile: +86 19831957301
Tel: +86 13910575315
Fax: 0310-8698866
URL: http://hbnq1.com/
Province/state: Hebei
City: Handan
Street: Congtai District, La Defense North
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CAS NO.147-85-3
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.
| Density | 1.2±0.1 g/cm3 |
|---|---|
| Boiling Point | 252.2±33.0 °C at 760 mmHg |
| Melting Point | 228 °C (dec.)(lit.) |
| Molecular Formula | C5H9NO2 |
| Molecular Weight | 115.131 |
| Flash Point | 106.3±25.4 °C |
| Exact Mass | 115.063332 |
| PSA | 49.33000 |
| LogP | -0.57 |
| Vapour Pressure | 0.0±1.1 mmHg at 25°C |
| Index of Refraction | 1.487 |
| Water Solubility | soluble |
| Chemical Properties | L-Proline, an amino acid, is colorless to white crystal or crystalline powder that has a slight, characteristic odor with a slightly sweet taste. It is soluble in water, insoluble in ethanol, diethyl ether and n-butanol, yellow in case of hydrated ninhydrin test solution, glacial acetic acid Red after acidification; pH=6.3, decomposition point is 220-222°C; specific optical rotation [α]20D-85° (0.5-2.0mg/ml, H2O), [α]20D-60.4° (0.5-2.0mg /ml, 5mol/LHCl). It is synthesized from L-glutamine and L-glutamate via L-ornithine in intestine, and from L-ornithine in liver. It is widely used as an ingredient in infusion and infant formula. |
| Occurrence | Reported found as a component in many proteins; also widely occurring as the free acid in natural products. A major constituent of collagen, the main fibrous protein found in bone, cartilage and other connective tissue. |
| Uses | L-Proline is used as asymmetric catalysts in organic synthesis and asymmetric aldol cyclization. It is involved in the Michael addition of dimethyl malonate to alfa-beta-unsaturated aldehydes. It is a precursor of hydroxyproline in collagen. It is an active component of collagen and involved in the proper functioning of joints and tendons. It finds uses in pharmaceutical, biotechnological applications due to its osmoprotectant property. Further, it is used with ninhydrin in the chromatography. |
| Uses | L-Proline is an amino acid and precursor (with vitamin C) for collagen, the building block of the structure of tendons, ligaments, arteries, veins and muscles. It is important in wound healing. |
| Preparation | Synthesis of L-proline: Using glutamic acid as a raw material, it is esterified with absolute ethanol under the catalysis of sulfuric acid, and triethanolamine is added to free the aminosulfate to obtain glutamic acid-δ-ethyl ester. The glutamic acid-δ-ethyl ester is then reduced with a metal reducing agent potassium borohydride to obtain crude proline, which is finally separated and purified to obtain crude L-proline. |
| Definition | ChEBI: L-proline is pyrrolidine in which the pro-S hydrogen at position 2 is substituted by a carboxylic acid group. L-Proline is the only one of the twenty DNA-encoded amino acids which has a secondary amino group alpha to the carboxyl group. It is an essential component of collagen and is important for proper functioning of joints and tendons. It also helps maintain and strengthen heart muscles. It has a role as a micronutrient, a nutraceutical, an algal metabolite, a Saccharomyces cerevisiae metabolite, an Escherichia coli metabolite, a mouse metabolite and a member of compatible osmolytes. It is a glutamine family amino acid, a proteinogenic amino acid, a proline and a L-alpha-amino acid. It is a conjugate base of a L-prolinium. It is a conjugate acid of a L-prolinate. It is an enantiomer of a D-proline. It is a tautomer of a L-proline zwitterion. |
| Biotechnological Production | Direct fermentation using analogue-resistant mutants of coryneform bacteria or Serratia marcescens is an economic production method. An isoleucine auxotrophic mutant of Brevibacterium flavum having resistance to sulfaguanidine and D,L-3,4-dehydroproline (DP) is able to accumulate 40 g/L L-proline. Brevibacterium flavum AP113 is claimed to produce 97.5 g/L L-proline; this mutant is characterized by isoleucine auxotrophy, resistance to DP, and osmotic pressure and incapable to degrade Lproline. A proline oxidase-less strain of Serratia marcescens, having resistance to DP, thiazoline-4-carboxylate and azetidine-2-carboxylate, overproduces 58.5 g/L L-proline into the culture medium. By amplification of the genes proA and proB in this type of regulatory mutant, a construct was obtained which yields 75 g/L L-proline. |
| benefits | L-proline is considered a non-essential amino acid as it can be synthesised from arginine via the urea cycle in liver, and from glutamine/glutamic acid in the intestinal epithelium. It has a number of beneficial properties including connective tissue strengthening, Stronger Connective Tissue, Decreased Risk Of Heart Disease, Maintenance Of Muscle Tissueand skin health. |
| General Description | L-Proline is a non-essential amino acid, which is a building block of proteins. Peptides bond to proline, making it a useful building block for proteins. It can be used as a cell culture media component for the commercial biomanufacturing of therapeutic recombinant proteins and monoclonal antibodies. L-Proline plays important roles in various biological processes. It is involved in the synthesis of collagen, which is one of the most abundant proteins in the human body and provides structural support to tissues such as skin, bone, cartilage, and tendons. |
| Biochem/physiol Actions | Proline is a cyclic, non-essential, hydrophobic amino acid. It is a proteinogenic amino acid which is crucial for primary metabolism. In peptide chains, proline residues confer structural constraints and enhance the susceptibility of proximal peptide bonds to protease activity. |
| Side effects | The only known side effects are reactions from taking too much L-proline, like all amino acids. It causes toxicity levels and amino acid imbalances in your body. |
| Purification Methods | A likely impurity is hydroxyproline. Purify L-proline via its picrate which is crystallised twice from water, then decomposed with 40% H2SO4. The picric acid is extracted with diethyl ether, the H2SO4 in solution is precipitated with Ba(OH)2, and the filtrate is evaporated. The residue is crystallised from hot absolute EtOH [Mellan & Hoover J Am Chem Soc 73 3879 1951] or EtOH/Et2O. Its solubility in H2O is >100%. It sublimes at 182-187o/0.3mm with 99.4% recovery and unracemised [Gross & Gradsky J Am Chem Soc 77 1678 1955]. It is hygroscopic and is stored in a desiccator. [Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 pp 2178-2199 1961, Beilstein 22 III/IV 8, 22/1 V 31.] |
| Structure and conformation | L-proline, also known as L-pyrrolidine-2-carboxylic acid, is a neutral amino acid. Although proline is classified as an amino acid, it is strictly speaking an imino acid, since it contains an imino group (carbon-nitrogen double bond). Due to its cyclic pyrrolidine side chain it is classified as a nonpolar aliphatic amino acid. |
| L-Proline Preparation Products And Raw 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.