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.
Documentation status
Preliminary safety reference
Available
Supplier-issued SDS
Available by request
COA
Available by RFQ / lot confirmation
Transport classification
Requires shipment review
Identity
CAS Number
3226-65-1
Chemical name
Methionine Sulfoxide
Molecular formula
C5H11NO3S
Molecular weight
165.21 g/mol
Synonyms
L-methionine sulfoxide; Methionine S-oxide; L-methionine S-oxide; (2S)-2-azaniumyl-4-methylsulfinylbutanoate; (2S)-2-azanyl-4-methylsulfinyl-butanoic acid; 2-Azaniumyl-4-methylsulfinylbutanoate; 2-amino-4-methanesulfinylbutanoic acid; 2-Amino-4-(methylsulfinyl)butanoic acid; 2-amino-4-methylsulfinylbutanoic acid; Butanoic acid, 2-amino-4-(methylsulfinyl)-; Uethionine, S-oxide; H-Met(O)-OH
InChIKey
QEFRNWWLZKMPFJ-YGVKFDHGSA-N
PubChem CID
158980
Hazard / GHS Reference
Signal word
Warning
Catalog reference cue; confirm supplier documentation before use.
Hazard statements
H315, H319, H335
Catalog reference cue; confirm supplier documentation before use.
Handling & PPE
- Keep container tightly closed and dry. Store in a well-ventilated place. Recommended storage conditions: sealed, dry, room temperature
First Aid / Accidental Release
- Do not give anything to an unconscious person. Rinse mouth with water. Consult a physician.
- If inhaled, move the patient to fresh air. If breathing stops, perform artificial respiration. Consult a physician.
- Rinse with plenty of water for at least 15 minutes and consult a physician.
- Wash with soap and plenty of water. Consult a physician.
- Use personal protective equipment and emergency procedures. Avoid dust generation. Avoid inhaling vapors, mists or gases. Ensure adequate ventilation. Evacuate personnel to a safe area. Avoid inhaling dust. See
- Do not allow the product to enter the sewer.
Firefighting / Stability
- If necessary, wear a self-contained breathing apparatus for firefighting.
Physical and Chemical Reference
Appearance
Solid
Catalog reference value; verify against supplier SDS before use.
Melting Point
232–234 °C
Catalog reference value; verify against supplier SDS before use.
XLogP
-4.1
Catalog reference value; verify against supplier SDS before use.
Transport / Shipment Review
Shipment review
Shipment details require review before fulfillment.
Transport classification must be confirmed using supplier SDS and shipment documentation before dispatch.
- Transport classification must be confirmed using supplier SDS and shipment documentation before dispatch.