L-Lysine Base
L-Lysine
CAS: 56-87-1
Molecular Formula: C6H14N2O2
L-Lysine Base - Names and Identifiers
| Name | L-Lysine |
| Synonyms | Lys Lysine L-Lysine L-Lys-OH laiansuan Lysine acid L-Lysine Base (S)-(+)-Lysine NEODIMIUM STAND Arginine EP Impurity A (2S)-2,6-Diaminocaproic acid, (2S)-2,6-Diaminohexanoic acid |
| CAS | 56-87-1 |
| EINECS | 200-294-2 |
| InChI | InChI=1/C6H14N2O2/c7-4-2-1-3-5(8)6(9)10/h5H,1-4,7-8H2,(H,9,10)/t5-/m0/s1 |
| InChIKey | KDXKERNSBIXSRK-YFKPBYRVSA-N |
L-Lysine Base - Physico-chemical Properties
| Molecular Formula | C6H14N2O2 |
| Molar Mass | 146.19 |
| Density | 1.1360 (rough estimate) |
| Melting Point | 215°C (dec.)(lit.) |
| Boling Point | 265.81°C (rough estimate) |
| Specific Rotation(α) | D20 +14.6° (c = 6.5); D23 +25.9° (c = 2 in 6.0N HCl) |
| JECFA Number | 1439 |
| Water Solubility | Soluble in water. Insoluble in ethanol, ethyl ether, acetone, benzene and common neutral solvent. |
| Solubility | Easily soluble in water, slightly soluble in ethanol, almost insoluble in ether |
| Appearance | Powder or Crystals |
| Color | White to light yellow |
| Merck | 14,5636 |
| BRN | 1722531 |
| pKa | 2.16(at 25℃) |
| Storage Condition | Keep in dark place,Inert atmosphere,Room temperature |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Sensitive | moisture absorption |
| Refractive Index | 26 ° (C=2, 5mol/L HC |
| MDL | MFCD00064433 |
| Physical and Chemical Properties | Melting Point: 215°C |
| Use | Used as food Fortifier and feed additive, also used in medicine |
L-Lysine Base - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Safety Description | 24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| RTECS | OL5540000 |
| TSCA | Yes |
| HS Code | 29224110 |
L-Lysine Base - Upstream Downstream Industry
| Raw Materials | Starch potato Charcoal Urea Sodium hydroxide Hydrochloric acid Ammonia |
| Downstream Products | lisinopril |
L-Lysine Base - Reference Information
| FEMA | 3847 | L-LYSINE |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| trait | white powder |
| Introduction | lysine is one of the essential amino acids, which can promote human development and enhance immune function, and improve the function of the central nervous tissue. Lysine is an essential basic amino acid. Because the lysine content in cereal food is very low, and is easily damaged and deficient during processing, it is called the first limiting amino acid. |
| Use | 1. Lysine is mainly used in food applications for flavor enhancer in milk powder, children's health care products, nutrition tonic (mainly used to strengthen L-lysine), because the smell is less than L-lysine hydrochloride, so the effect is better. 2, lysine can be used as a flavoring agent. For alcohol, cool drinks, bread, starch, and other products. 3, lysine can be used as a business additive. nutritional supplements. For the fortification of lysine in foods. Plant proteins are generally low in lysine. The lysine contained in Rye, rice, corn, peanut flour and the like is a limiting amino acid, and the lysine contained in wheat, sesame, oat and the like is a first limiting amino acid. In Japan, the amount (in terms of L-lysine) to be fortified is 150mg/100g for wheat flour, pasta, instant noodles, etc.; 100mg/100g for bread, biscuits, etc.; And 50mg/100g for instant noodles. Can be used for mayonnaise, milk powder, milk, convenience food. Adult daily minimum requirements (based on L-lysine): about 0.8g for men, about 0.4g for women, young people 12~32mg/kg, young children 1.25 mg/kg(1gL-lysine equivalent to L-lysine hydrochloride g). used in biochemical research, medically for malnutrition, loss of appetite and hypoplasia. lysine is one of the essential amino acids for human and animal growth, and has important uses in infusion, nutrition medicine, food and feed additives. used as food Fortifier and feed additive, also used in medicine mainly used as food fortifier, nutritional supplement, but also can improve the performance of some drugs, improve the efficacy. used as amino acid drug |
| preparation | preparation of Free L-lysine solids: weigh 1.00kgL-lysine hydrochloride and add it to 5.0L of purified water, stir and dissolve it for clarification, then add the solution to 7.20kg activated strong acid cation exchange resin column, rinse the resin column slowly, after 2-3H rinse, continue to wash with purified water until neutral and chloride-free (0.1mol/L silver nitrate monitoring and extensive pH test paper). Add 11.1kg of 5%v/v ammonia water to the resin column, rinse the resin column slowly for about 2-3H. When the pH value is greater than 10, collect the alkaline eluent, collection was stopped until the pH was reduced to around 10. Concentrate the collected solution under reduced pressure at 60 ℃(-0.10 ~-0.08Mpa), concentrate the water and ammonia until no liquid drops out, and continue to concentrate to white solid, add 8L of anhydrous ethanol to the system, continue beating and crystallization, beating for 3H, precipitate all solids, centrifuge and filter out the solids until no liquid drops, lay the filter cake on the enamel tray, vacuum drying (60±5 ℃,-0.08 ~-0.1Mpa)8h, the product is cooled to room temperature, sealed bag sealed in a cool place to store, Free L-lysine solid 776G, yield 96.95% |
| production method | L-lysine is generally supplied to the market as L-lysine hydrochloride [657-27-2], free L-lysine is easy to deliquescence, and is easy to yellow deterioration due to free amino group, and has a stimulating smell, which is difficult to store for a long time. L-lysine hydrochloride is relatively stable, not easy to deliquescence, easy to save. However, the demand for L-lysine is also increasing for some applications, such as polypeptide synthesis chemistry, biochemical research, preparation of lysine derivatives, etc. Free L-lysine can be prepared from L-lysine hydrochloride. with red blood cells as raw material, suspended in sulfuric acid solution, with calcium hydroxide precipitation, washing, picric acid dissolution, crystallization to obtain the product. It is generally prepared by a fermentation method, including a two-step method via diaminopimelic acid and a one-step method for direct preparation from sugars. There are two kinds of synthetic methods which take caprolactam as raw material and furfural as raw material. It is obtained by hydrolyzing blood meal, casein and defatted soybean and separating them with ion exchange resin. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 20:45:29
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Raw Materials for L-Lysine Base
Downstream Products for L-Lysine Base