L-Methionine
Preliminary reference disclaimer
This preliminary safety reference is generated from structured MolGraph catalog fields and public reference-style data. It is not a supplier-issued Safety Data Sheet and should not be used as a substitute for supplier-issued documentation, workplace safety review, transport classification, or regulatory compliance decisions. For supplier SDS or COA, submit a documentation request through MolGraph.
Preliminary safety reference
Available
Supplier-issued SDS
Available by request
COA
Available by RFQ / lot confirmation
Transport classification
Requires shipment review
CAS Number
63-68-3
Chemical name
L-Methionine
Molecular formula
C5H11NO2S
Molecular weight
149.21 g/mol
Synonyms
methionine; h-Met-oh; (S)-2-Amino-4-(methylthio)butanoic acid; Cymethion; L-(-)-Methionine; S-Methionine; L-Methioninum; Neo-methidin; Methilanin; (S)-methionine; (L)-Methionine; metionina
InChIKey
FFEARJCKVFRZRR-BYPYZUCNSA-N
PubChem CID
6137
Signal word
Warning
Catalog reference cue; confirm supplier documentation before use.
Hazard statements
H302
Catalog reference cue; confirm supplier documentation before use.
Appearance
Minute hexagonal plates from dilute alcohol. (NTP, 1992)
Catalog reference value; verify against supplier SDS before use.
Melting Point
283–284 °C
Catalog reference value; verify against supplier SDS before use.
Density
1.18 g/cm³
Catalog reference value; verify against supplier SDS before use.
pKa
2.28
Catalog reference value; verify against supplier SDS before use.
Vapor Pressure
Estimated very low; unit not specified
Catalog reference value; verify against supplier SDS before use.
XLogP
-1.9
Catalog reference value; verify against supplier SDS before use.
Shipment review
Shipment details require review before fulfillment.
Transport classification must be confirmed using supplier SDS and shipment documentation before dispatch.