n-Octadecane,
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Octadecyl Silane
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Octanesulfonic Acid Sodium Salt
(Sodium 1-octanesulfonate),
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1-Octanol
(Alcohol C8; Capryl Alcohol; Octyl Alcohol),
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Octanophenone,
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Assay
Mobile phase
Prepare a filtered and degassed mixture of acetonitrile and water (7:3).
Procedure
Inject about 20 µL into a suitable liquid chromatograph (see Chromatography
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Refractive index
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(p-tert-Octylphenoxy) nonaethoxyethanol,
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[NoteA suitable grade is available commercially as Tergitol Nonionic NPX, and as Triton N101, from reagent suppliers. ]
(p-tert-Octylphenoxy)polyethoxyethanol
Use a suitable grade.
[NoteA suitable grade is available commercially as Triton 100 from reagent suppliers. ]
Octyl Sulfate, Sodium Salt,
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Solubility
A 2-g portion dissolves in 100 mL of water.
Melting range
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Olefin Detector Tube
A fuse-sealed glass tube so designed that gas may be passed through it and containing suitable absorbing filters and support media for the indicator in a stabilized form of permanganate.
Measuring range:
0.06 to 3.2 Vol.% Propylene, 0.04 to 2.4 Vol.% Butylene.
[NoteAvailable from Draeger Safety, Inc., www.draeger.com. ]
Oligo-deoxythymidine
Polymeric length: 18. Use a suitable grade.
[NoteA suitable grade is available from BD Biosciences, www.bdbiosciences.com. ]
Orange G
(the sodium salt of azobenzene-betanaphthol disulfonic acid),
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Orcinol
(5-Methylresorcinol),
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Assay
Transfer about 60 mg, accurately weighed, to a 100-mL volumetric flask, dissolve in methanol, dilute with methanol to volume, and mix. Transfer 5.0 mL of this solution to a 50-mL volumetric flask and dilute with methanol to volume, and mix. Using a suitable spectrophotometer, 1-cm cells, and methanol as the blank, record the absorbance of the solution at the wavelength of maximum absorbance at about 273 nm. From the observed absorbance, calculate the absorptivity (see Spectrophotometry and Light-scattering
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Melting range
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Osmium Tetroxide
(Osmic Acid; Perosmic Anhydride),
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Oxalic Acid,
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3,3¢-Oxydipropionitrile,
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Boiling range:
between 174
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Oxygen Certified Standard
A suitable NLT 99.99% oxygen certified standard is available from most suppliers of specialty gases.
21% Oxygen Certified Standard
A suitable certified standard mixture of 21.0 ± 0.3% absolute oxygen in nitrogen is available from most suppliers of specialty gases.
93% Oxygen Certified Standard
A suitable certified standard mixture of 93.0 ± 0.1% absolute oxygen in nitrogen is available from most suppliers of specialty gases.
Oxygen-Helium Certified Standard
A mixture of 1.0% oxygen in industrial grade helium. It is available from most suppliers of specialty gases.
Auxiliary Information
Please check for your question in the FAQs before contacting USP.
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