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Chemical Properties

CAS Registry Number: 84-75-3

Selected information from two of the National Library of Medicine's databases: ChemIDPlus2 and HSDB3.

Names 1

  • 1,2-Benzenedicarboxylic Acid, Dihexyl Ester
  • Di-(n-hexyl)phthalate
  • Dihexyl phthalate

Structure

Chemical Structure for Chemical Abstracts Service Registry Number 84-75-3 from NLM

Synonyms (Sources: NTP,HSDB,RTECS,MESH)2

  • 1,2-Benzenedicarboxylic acid, dihexyl ester
  • 1,2-Benzenedioic acid dihexyl ester
  • 4-09-00-03179 (Beilstein Handbook Reference)
  • AI3-04274 (USDA)
  • BRN 1886839
  • Bis(n-hexyl) phthalate
  • Di-n-hexyl phthalate
  • Dihexyl 1,2-benzenedicarboxylate
  • Dihexyl phthalate
  • Dihexylester kyseliny ftalove [Czech]
  • HSDB 4490
  • Hexyl phthalate, 1,2-
  • Phthalic acid, dihexyl ester

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Other Registry Numbers2

  • None Found

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Chemical Properties3

Property Description
Boiling Point
  • 210 deg C at 5 mm Hg
Color/Form
  • Clear, oily liuid
Corrosivity
  • None Found
Critical Temperature & Pressure
  • None Found
Density/Specific Gravity
  • 1.010-1.016 at 20 deg C/20 deg C
Dissociation Constants
  • None Found
Heat Of Combustion
  • None Found
Heat Of Vaporization
  • None Found
Melting Point
  • -58 deg C
Molecular Weight
  • 334.450
Odor
  • Slightly aromatic
Other Chemical/Physical Properties
  • ... Resistance to migration from polymers, low temperature flexibility ... compatibility with polar polymers and additives over a wide range of compositions. /Phthalate esters/
  • Acidity (as phthalic acid) 0.01% max
  • CONVERSION FACTORS: 13.65 MG/CU M= APPROX 1 PPM
  • Henry's Law constant = 2.57X10-5 atm-cu m/mol at 25 deg C (est)
  • Hydroxyl radical reaction rate constant = 1.49X10-11 cu cm/molec-sec at 25 deg C (est)
  • Phthalate esters are soluble to various extents in many common organic solvents and oils, but have a relatively low solubility in water. /Phthalate esters/
  • Phthalate esters would be expected to have UV maxima in the 230 nm and 270 nm regions. /Phthalate esters/
Relative Evaporation Rate
  • None Found
Solubilities
  • In water, 0.05 mg/L at 25 deg C
Spectral Properties
  • IR: 197 (Sadtler Research Laboratories IR grating Collection)
  • MASS: 15515 (NIST/EPA/MSDC Mass Spectral database, 1990 version)
  • Raman: 482 (Sadtler Research Laboratories Spectral Collection)
  • UV: 297 (Sadtler Research Laboratories Spectral Collection)
Surface Tension
  • None Found
Taste
  • None Found
Vapor Density
  • 11.5 (Air = 1)
Vapor Pressure
  • 1.4X10-5 mm Hg at 25 deg C
Viscosity
  • None Found
log P (octanol-water)
  • log Kow = 6.82
pH
  • None Found

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Uses3

  • DnHP is used in the making of plastisols that are subsequently used in the manufacture of automobile parts (air filters, battery covers) and dip-molded products (tool handles, dishwasher baskets). Commercial phthalate substances containing DnHP may be added to the PVC utilized in the manufacture of flooring, canvas tarps, and notebook covers. Substances containing DnHP may also be used in traffic cones, toys, vinyl gloves, weather stripping, flea collars, shoes, and conveyor belts used in food packaging operations. **PEER REVIEWED**
  • Plasticizer for cellulose ester and vinyl plastics. **PEER REVIEWED**

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Notes (Sources: NTP,HSDB,RTECS,MESH)2

  • None Found.

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Superlist Classes2

  • None Found

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Links to Additional Information2

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Footnotes

1 Source: the NTP's CEBS database.

2 Source: the National Library of Medicine's ChemIDPlus, 02/28/2017.

3 Source: the National Library of Medicine's Hazardous Substance Database, 02/28/2017.

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