AC-MET-OH
N-Acetylmethionine
CAS: 65-82-7
Molecular Formula: C7H13NO3S
AC-MET-OH - Names and Identifiers
| Name | N-Acetylmethionine |
| Synonyms | NAM AC-MET-OH N-AC-L-MET Ac-L-Met-OH AC-METHIONINE N-ACETYL-L-MET N-AC-L-METHIONINE N-Acetylmethionine ACETYL-L-METHIONINE N-Acetyl-L-methionine N-acetyl-L-methionine (2S)-N-ACETYL-L-METHIONINE N-ALPHA-ACETYL-L-METHIONINE N-alpha-Actetyl-L-methionine L-Methionine-15N, N-Acetyl Derivative (2S)-2-(acetylamino)-4-(methylsulfanyl)butanoate |
| CAS | 65-82-7 |
| EINECS | 200-617-7 |
| InChI | InChI=1/C7H13NO3S/c1-5(9)8-6(7(10)11)3-4-12-2/h6H,3-4H2,1-2H3,(H,8,9)(H,10,11)/p-1/t6-/m0/s1 |
| InChIKey | XUYPXLNMDZIRQH-LURJTMIESA-N |
AC-MET-OH - Physico-chemical Properties
| Molecular Formula | C7H13NO3S |
| Molar Mass | 191.25 |
| Density | 1.2684 (rough estimate) |
| Melting Point | 103-106°C(lit.) |
| Boling Point | 235 °C(Press: 12 Torr) |
| Specific Rotation(α) | -20 º (c=4 H2O) |
| Flash Point | 228.1°C |
| Solubility | methanol: soluble100mg/mL, clear, colorless |
| Vapor Presure | 1.72E-09mmHg at 25°C |
| Appearance | Solid |
| Color | White to Off-White |
| Merck | 14,96 |
| BRN | 1725552 |
| pKa | 3.50±0.10(Predicted) |
| Storage Condition | Sealed in dry,Room Temperature |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Refractive Index | -21 ° (C=1, H2O) |
| MDL | MFCD00064441 |
| Physical and Chemical Properties | Melting point 103-106°C(lit.) specific optical rotation -20 ° (c = 4 H2O) refractive index -21 ° (C = 1, H2O) storage conditions 0-6°C Merck 14,96 BRN 1725552 |
AC-MET-OH - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S24/25 - Avoid contact with skin and eyes. S36 - Wear suitable protective clothing. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| WGK Germany | 3 |
| RTECS | PD0480000 |
| TSCA | Yes |
| HS Code | 29309070 |
| Hazard Class | IRRITANT |
| Toxicity | 可安全用于食品(FDA，§172．372，2000)。 |
AC-MET-OH - Reference Information
| identification test | take 250mg of sample, dissolve it in 2.5ml of isopropanol, and dilute it to 25ml with water. Take this fluid. 10ml is diluted with water to 100 m1. Take 0.5, 30 and 50 μ1 of the liquid and drop it 2cm away from the bottom edge of the thin layer chromatography plate. The chromatography plate is coated with silica gel (I .e., 20cm × 20cm Brinkman silica gel 60.250nm, or equivalent). In a sealed and balanced thin layer chromatography spreading groove, the chromatography is expanded by 10cm. The spreading agent consists of n-butanol, acetic acid and water at 75:20=20. The chromatography plate was dried overnight. The chromatographic plate was sprayed with 3ml of 10% hexachloroplatinic acid, 97ml of water and 100ml of 6% potassium iodide solution. The sample should form a separate stain with Rf value of 0.67~0.1. |
| content analysis | accurately weigh the sample about 250mg, move it into a glass stopper flask, and add 100ml of water, 5g of dipotassium hydrogen phosphate, 2g of potassium dihydrogen phosphate and 2g of potassium iodide. After fully mixing and dissolving, add 0. 1mol/L iodine solution 50.0 m1, plug and mix well. Let stand for 30 minutes and titrate excess iodine with 0.1mol/L sodium thiosulfate. At the same time, blank titration test was carried out. 0.1mol/L iodine solution per Ml is equivalent to 9.563mg of this product (C7H13NO3S). |
| toxicity | can be safely used in food (FDA, 172.372,2000). |
| Use limit | accounts for 3.1% of the total protein content in food (based on free L-methionine). It shall not be used in infant food and foods containing nitrite/nitrate (FDA,§ 172.372,2000). |
| maximum allowable usage of food additives maximum allowable residue standard | ▼ ▲ additive Chinese name food Chinese name additive function maximum allowable usage (g/kg) maximum allowable residue (g/kg) L-methionine (L-methionine) infant and larger infant formula powder nutrition fortifier 150-400mg/100g |
| chemical properties | colorless or shiny white crystals or white powder. Odorless or almost odorless. Melting point 103~106 ℃,[α]D20-20 0.5. Soluble in water, ethanol, alkaline solution and dilute inorganic acid, almost insoluble in ether. |
| use | nutritional supplement. |
| Production method | It is formed by acetylation of L-methionine with excess acetic acid or acetic anhydride. |
| category | toxic substances |
| toxicity classification | low toxicity |
| acute toxicity | vein-mouse LD50: 435 mg/kg |
| flammability hazard characteristics | flammability; heating decomposition releases toxic nitrogen oxides and sulfur oxide smoke |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| fire extinguishing agent | dry powder, foam, sand, carbon dioxide, mist water |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
Last Update：2024-04-09 21:11:58
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