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4-tert-octylphenol

CAS Number
140-66-9
EC Number
205-426-2
Chemical Formula
C14H22O
Molecular Weight
206.32 g/mol

Description

4-tert-Octylphenol (CAS 140-66-9 ), also known as 4-(1,1,3,3-tetramethylbutyl)phenol, is an alkylphenol intermediate used across industrial synthesis and formulation chemistry. It functions primarily as a building block for nonionic surfactants and phenolic resins. The chemical is also essential for antioxidant systems. In coatings and adhesives, it serves as a reactive intermediate in the production of alkylphenol-ethoxylate surfactants and tackifying resins that influence adhesion and film formation. Lubricant and metalworking formulators incorporate it into antioxidant and extreme-pressure additive packages to extend fluid service life. This ensures high performance in demanding industrial environments and mechanical systems. In plastics and polymer processing, it contributes to UV stabilizer and antioxidant formulations. These protect against thermal and photo-oxidative degradation during compounding, maintaining the structural integrity of the final plastic products. Printing ink manufacturers use it as a resin modifier to adjust viscosity, adhesion, and drying performance in solvent-based systems. This versatility makes it a staple component in high-quality industrial printing applications. 4-tert-Octylphenol is supplied as a white to off-white solid in flake or molten liquid form, depending on logistics requirements. Technical grade is the standard commercial offering, with purity specifications typically at 99% or above. Packaging options generally include drums and bulk containers suited to industrial procurement volumes. Our logistics team ensures that all shipments meet the necessary safety and handling requirements for chemical distribution. Contact us for supply of 4-tert-octylphenol Request Quote

Other Names (Synonyms)

4-t-Octylphenol | 4-(2,4,4-trimethylpentan-2-yl)phenol | 4-(1,1,3,3-TETRAMETHYLBUTYL)PHENOL | p-tert-Octylphenol | Phenol, 4-(1,1,3,3-tetramethylbutyl)- | p-Terc.oktylfenol | p-(1,1,3,3-Tetramethylbutyl)phenol | para-tert-Octylphenol

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point84-85 °C
Boiling Point158 °C @ Press: 20 Torr
Density0.89 g/cm³ @ Temp: 90 °C
Flash Point145 °C
Appearancewhite powder
ColorWhite flakes
Formneat
Water Solubility7mg/L at 20℃
Vapor Pressure2Pa at 38℃
Refractive Index1.5003 (estimate)
Log P4.8 at 22℃

Safety & Handling

Danger
GHS05· CorrosiveGHS09· EnvironmentGHS07· IrritantGHS08· Health Hazard

Hazard Statements

H312Harmful in contact with skin
H314Causes severe skin burns and eye damage
H315Causes skin irritation
H318Causes serious eye damage
H319Causes serious eye irritation
H336May cause drowsiness or dizziness
H361Suspected of damaging fertility or the unborn child
H373May causes damage to organs through prolonged or repeated exposure
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects

Precautionary Statements

P203Obtain, consult and follow expert instructions for use.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P271Use only outdoors or in a well-ventilated area.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P318IF exposed or concerned, get medical advice.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P363Wash contaminated clothing before reuse.
P391Collect spillage.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P233Store in a well-ventilated place. Keep container tightly closed.
P331Rinse mouth. Do NOT induce vomiting.
P354IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29071300
Storage Class3 - Flammable liquids
WGK (Germany)2