Selecting L-Methionine for Industrial Chemicals: mechanism, companions and pitfalls
L-Methionine (CAS 63-68-3) isn't a “buy and it works” material. In Industrial Chemicals, its compatibility with the rest of the system and the dosing rhythm usually matter more than the nominal assay.
Basic specifications
| Name | L-Methionine |
|---|---|
| English name | L-Methionine |
| CAS No. | 63-68-3 |
| Formula | C5H11NO2S |
| Molecular weight | 149.05 g/mol |
| Applications | Industrial Chemicals |
| Standard purity | per batch COA |
| Packaging | confirmed per order |
| Storage | keep sealed in a cool, dry place |
Figures above are published / typical information; final values follow the batch COA and order confirmation.
Key physical data: molecular formula C5H11NO2S, molecular weight 149.05 g/mol, CAS 63-68-3, melting point 283 °C, boiling point 181 °C. Sourced from public chemical databases such as PubChem, ChemSpider and the CAS Registry; the CAS number is the authoritative registry identifier. Purity and packaging follow the batch COA and order confirmation.
What it actually does here
Put plainly,Industrially, the value of L-Methionine (CAS 63-68-3) is rarely on the spec sheet — it is whether it stably meets your process window. In Industrial Chemicals, its purity, impurity profile and batch consistency usually matter more than a single 'assay' number, because what really moves the finished result is often the ignored impurities and physical properties. Comparable grades:
- Magnesium Chloride (CAS 7786-30-3)：a comparable grade often evaluated alongside。
- Zinc Citrate (CAS 546-46-3)：a comparable grade often evaluated alongside。
- L-Threonic Acid Calcium (CAS 70753-61-6)：a comparable grade often evaluated alongside。
- Calcium Citrate Malate (CAS 159771-97-8)：a comparable grade often evaluated alongside。
- Calcium Citrate (CAS 813-94-5)：a comparable grade often evaluated alongside。
- Calcium acetate (CAS 62-54-4)：a comparable grade often evaluated alongside。
- edta iron(iii) sodium salt (CAS 15708-41-5)：a comparable grade often evaluated alongside。
- ferric citrate (CAS 3522-50-7)：a comparable grade often evaluated alongside。
How to get the choice right
- The one I weigh most: Define the end use and process window first, then work back to required purity and impurity limits — not the other way around.
- Check compatibility with other materials in the system; run a trial when unsure.
- Match packaging and feeding method to on-site equipment so the material is usable on arrival.
- Retain samples of critical lots and run third-party checks; do not rely on the supplier COA alone.
A few common pitfalls
Comparing price but not impurity profile: same assay with different impurities can yield wildly different results.
Skipping samples and scaling up: going straight to volume most often fails on compatibility.
Ignoring transport and storage: most 'arrived-dead' cases trace back to loose handling.
Common buyer questions
When buying L-Methionine, which batch documents should I expect?
Standard flow: COA with each shipment, MSDS and TDS on request; if you have a target spec or customer acceptance criteria, list the key limits up front — the supplier will match to your grade, which beats a generic COA.
What should I compare between different batches of L-Methionine?
Beyond assay, the impurity profile and batch-to-batch consistency matter most — residual solvent, colour, heavy metals can shift significantly at the same nominal purity, and that is what moves the finished result. Hold samples of critical lots for third-party checks.
What usually goes wrong with L-Methionine in transport and storage?
Most 'arrived-dead' cases trace back to loose handling: moisture, over-temperature, or commingling. Keep sealed packaging in a cool, dry store, and verify lot numbers and arrival temperature before dosing.
What is the molecular formula and weight of L-Methionine?
For L-Methionine, the molecular formula is C5H11NO2S and molecular weight about 149.05 g/mol (CAS 63-68-3). These are published physical properties; exact purity, specification and packaging follow the batch COA and order confirmation.
Further reading
- Magnesium Chloride (CAS 7786-30-3)
- Zinc Citrate (CAS 546-46-3)
- L-Threonic Acid Calcium (CAS 70753-61-6)
- Calcium Citrate Malate (CAS 159771-97-8)
- Calcium Citrate (CAS 813-94-5)
- Calcium acetate (CAS 62-54-4)
See site search for L-Methionine or browse the Organic Chemicals directory.
How to get files & a quote
Jinan Shenghe Chemical Co., Ltd. supplies chemical raw materials and fine chemicals; a COA ships with every batch, with MSDS and technical data sheets available on request. In your enquiry include product name, CAS, target purity and packaging, and we will provide documents and a quote to the relevant standard.
Contact: info@chemsp.cn | +86-18553102138
Note: This page is for industrial raw-material technical discussion only. Products are supplied for industrial and research use, not for consumer or medical use. Drinking-water, food, cosmetic or pharmaceutical applications must meet applicable regulations and customer standards; specifications, compliance documents and transport requirements follow the batch COA and order confirmation.
Data source & notes
Physical data in this page (formula, molecular weight, etc.) is referenced from public chemical databases such as PubChem, ChemSpider and the CAS Registry — intrinsic published properties of the substance.The CAS number (63-68-3) of L-Methionine is the authoritative registry identifier from CAS, useful for precise cross-database verification.Purity, packaging, storage and transport follow the batch COA and order confirmation documents; application notes are general industry experience and any specific process must be validated and assessed for compliance.