Shanghai Ruifu Chemical Co., Ltd. is the leading manufacturer and supplier of DL-Methionine (H-DL-Met-OH) (CAS: 59-51-8) with high quality, production capacity 1000 Tons per year. Ruifu Chemical supplys a series of amino acids & derivatives. We can provide COA, worldwide delivery, small and bulk quantities available. If you are interested in DL-Methionine, Please contact: alvin@ruifuchem.com
| Chemical Name |
DL-Methionine |
| Synonyms |
H-DL-Met-OH; Dextro, Laevo-Methionine; (±)-Methionine; (±)-2-Amino-4-(Methylmercapto)butyric Acid; DL-2-Amino-4-(Methylthio)butanoic Acid; (±)-2-Amino-4-(Methylthio)butyric Acid |
| Stock Status |
In Stock, Production Capacity 1000 Tons per Year |
| CAS Number |
59-51-8 |
| Molecular Formula |
C5H11NO2S |
| Molecular Weight |
149.21 |
| Melting Point |
270.0~280.0℃(dec.)(lit.) |
| Boiling Point |
306.9±37.0℃ |
| Density |
1.340 g/ml |
| Sensitive |
Light Sensitive |
| Solubility in Hot Water |
Almost Transparency |
| Solubility |
Soluble in 5M HCl (100 mg/ml), Water (56.6 mg/ml at 25℃), Acetic Acid, and Warm Dilute Alcoho. Insoluble in Ether, Acetone, Benzene |
| Storage Temp. |
Sealed in Dry, Store at Room Temperature |
| COA & MSDS |
Available |
| Classification |
Amino Acids & Derivatives |
| Brand |
Ruifu Chemical |
| Hazard Codes |
Xi |
RTECS |
PD0457000 |
| Risk Statements |
33-36/37/38 |
F |
10-23 |
| Safety Statements |
24/25-36-26 |
TSCA |
Yes |
| WGK Germany |
2 |
HS Code |
2930400000 |
| Items |
Inspection Standards |
Results |
| Appearance |
White Crystals or Crystalline Powder |
Conforms |
| Identification |
Infrared Absorption Spectrum |
Conforms |
| Specific Rotation [α]20/D |
-33.5° to -35.2°(C=2, H2O) |
-33.8° |
| State of Solution (Transmittance) |
Clear and Colorless ≥98.0% |
99.52% |
| Chloride (Cl) |
≤0.020% |
<0.020% |
| Sulfate (SO4) |
≤0.020% |
<0.020% |
| Ammonium (NH4) |
≤0.020% |
<0.020% |
| Iron (Fe) |
≤10ppm |
<10ppm |
| Heavy Metals (Pb) |
≤10ppm |
<10ppm |
| Arsenic (As2O3) |
≤1.0ppm |
<1.0ppm |
| Other Amino Acids |
Chromatographically Not Detectable |
Conforms |
| Loss on Drying |
≤0.30% |
0.16% |
| Residue on Ignition (Sulfated) |
≤0.10% |
0.04% |
| Assay |
98.5 to 101.0% (Titration: Anhydrous Basis) |
99.7% |
| pH Value |
5.6 to 6.1 (1.0g in 100ml of H2O) |
5.8 |
| Conclusion |
This Product by Inspection Accords with the Standard of AJI97 |
| Main Uses |
Amino Acids; Food Additives; Pharmaceutical Intermediates |
DL-Methionine (H-DL-Met-OH) (CAS: 59-51-8) AJI 97 Test Method
Identification: Compare the infrared absorption spectrum of the sample with that of the standard by potassium bromide disc method.
State of Solution (Transmittance): 0.5g in 20ml of H2O, spectrophotometer, 430nm, 10mm cell thickness.
Chloride (Cl): 0.7g, A-4, ref: 0.40ml of 0.01mol/L HCl
Ammonium (NH4): A-2
Sulfate (SO4): 1.2g, (1), ref: 0.50ml of 0.005mol/L H2SO4
Iron (Fe): 1.5g, ref: 1.50ml of Iron Std. (0.01mg/ml)
Heavy Metals (Pb): 2.0g, dissolve by warming, ref: 2.0ml of Pb Std. (0.01mg/ml)
Arsenic (As2O3): 2.0g, (1), ref: 2.0ml of As2O3 Std.
Other Amino Acids: Test Sample: 50μg, B-1-a, control; DL-Met 0.25μg
Loss on Drying: at 105℃ for 4 hours.
Residue on Ignition (Sulfated): AJI Test 13
Assay: Dried sample, 150mg, (1), 3ml of formic acid, 50ml of glacial acetic acid, 0.1mol/L HCLO4 1ml=14.921mg C5H11NO2S
pH Test: 1.0g in 100ml of H2O
Package: Fluorinated Bottle, 25kg/bag, 25kg/Cardboard Drum, or according to customer's requirement.
Storage Condition: Store in sealed containers at cool, dry and ventilated warehouse away from incompatible substances. Protect from light and moisture.
How to Purchase? Please contact Dr. Alvin Huang: sales@ruifuchem.com or alvin@ruifuchem.com
15 Years Experience? We have more than 15 years of experience in the manufacture and export of a wide range of high quality pharmaceutical intermediates or fine chemicals.
Main Markets? Sell to domestic market, North America, Europe, India, Korea, Japanese, Australia, etc.
Advantages? Superior quality, affordable price, professional services and technical support, fast delivery.
Quality Assurance? Strict quality control system. Professional equipment for analysis include NMR, LC-MS, GC, HPLC, ICP-MS, UV, IR, OR, K.F, ROI, LOD, MP, Clarity, Solubility, Microbial limit test, etc.
Samples? Most products provide free samples for quality evaluation, shipping cost should be paid by customers.
Factory Audit? Factory audit welcome. Please make an appointment in advance.
MOQ? No MOQ. Small order is acceptable.
Delivery Time? If within stock, three days delivery guaranteed.
Transportation? By Express (FedEx, DHL), by Air, by Sea.
Documents? After sales service: COA, MOA, ROS, MSDS, etc. can be provided.
Custom Synthesis? Can provide custom synthesis services to best fit your research needs.
Payment Terms? Proforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T (Telex Transfer), PayPal, Western Union, etc.
H
DL-Methionine (H-DL-Met-OH) (CAS: 59-51-8) is used