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
78-50-2
Chemical name
Trioctylphosphine oxide
Molecular formula
C24H51OP
Molecular weight
386.6 g/mol
Synonyms
Tri-n-octylphosphine oxide; TOPO; Phosphine oxide, trioctyl-; Cyanex 921; Hostarex PX 324; Trioctyl phosphine oxide; 1-(dioctylphosphoryl)octane; tri-n-octylphosphineoxide; EC 201-121-3; (OCT)3PO; Trioctyl(oxo)-lambda~5~-phosphane; Trioctylphosphine oxide, Selectophore(TM)
InChIKey
ZMBHCYHQLYEYDV-UHFFFAOYSA-N
PubChem CID
65577
Hazard / GHS Reference
Signal word
Danger
Catalog reference cue; confirm supplier documentation before use.
Hazard statements
H315, H318, H412
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: nitrogen-purged, 2-8°C
- If exposed to a harmful environment, use a P95 (US) or P1 (EU) particulate respirator. For higher level protection, use an OV/AG/P99 (US) or ABEK-P2 (EU) gas mask. Respirators must be tested and approved by government standards such as NIOSH (US) or CEN (EU).
- Dispose of remaining and non-recyclable solutions to a licensed company. Contact a professional agency with a waste disposal license to handle this substance. Burn in a chemical incinerator with post-combustion and cleaning functions if soluble or mixed with flammable solvents. Burn contaminated packaging. Dispose of contaminated packaging as per unused product.
First Aid / Accidental Release
- Do not give anything to an unconscious person. Rinse mouth with water. Consult a physician.
- If inhaled, move the person 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.
- Do not generate dust when collecting and disposing. Sweep and shovel up. Place in a suitable closed container for disposal.
- 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 drains.
- Dispose of remaining and non-recyclable solutions to a licensed company. Contact a professional agency with a waste disposal license to handle this substance. Burn in a chemical incinerator with post-combustion and cleaning functions if soluble or mixed with flammable solvents. Burn contaminated packaging. Dispose of contaminated packaging as per unused product.
Firefighting / Stability
- If necessary, wear a self-contained breathing apparatus for firefighting.
- and reactivity
- Carbon monoxide, carbon dioxide, phosphorus oxide
Physical and Chemical Reference
Appearance
White solid; [Sigma-Aldrich MSDS]
Catalog reference value; verify against supplier SDS before use.
Melting Point
52.0 °C
Catalog reference value; verify against supplier SDS before use.
XLogP
9.6
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.