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| Product Name: |
DL-Methionine
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| Supply Ability: |
10000tons |
| Related proudcts |
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| Specifications |
25kg net paper bag |
| Price Term: |
FOB |
| Port of loading: |
QINGDAO |
| Minimum Order |
25 Kilograms |
| Unit Price: |
US $20-70 / Kilogram |
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CAS No.: 59-51-8
FEMA No.: 3301
CE No.: 569c
EC No.: 200-432-1
Formula: C5H11NO2S
Molecular weight: 149.21
Appearance: Colorless or white crystal
or white crystalline powder
GENERAL PROPERTIES & CHARACTERISTICS
State of solution(transmittance):Clear 98.0% min.
Chloride(Cl): 0.020% max.
Ammonium(NH4): 0.02% max.
Sulfate(SO4): 0.020% max.
Iron(Fe): 10ppm max.
Heavy metals (Pb): 10ppm max.
Arsenic(As2O3): 1ppm max.
Other amino acids: Chromatographically not ***ectable
Loss on drying: 0.30% max.
Residue on ignition(sulfated):0.05% max.
Assay: 99.0% min.
PH: 5.6 to 6.1
Introduction
As an essential amino acid, methionine is not synthesized in humans, hence we must ingest methionine or methionine-containing proteins. In plants and microorganisms, methionine is synthesized via a pathway that uses both and . First, a***rtic acid is converted via ¦Â-a***rtyl-semialdehyde into homoserine, introducing the pair of contiguous methylene groups. Homoserine converts to O-succinyl , which then reacts with cysteine to produce , which is cleaved to yield . Subsequent methylation of the group by affords methionine. Both and require as a , whereas requires as a cofactor
Package: In 25kg net paper bag or cardboard drum
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| Company: |
Qingdao Yidingyuan chemical Co., LTD
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| Contact: |
Ms. Lisa zhang |
| Address: |
Room 1602 of Unit No.2, Build 10#, No 117, Yanji Road |
| Postcode: |
266000 |
| Tel: |
86-532-58975989 |
| Fax: |
86-532-55672669 |
| E-mail: |
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